How to cover a flat roof with a profiled sheet. Installation of a profiled sheet on the roof: step by step instructions. Required additional items

07.03.2020

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Metal profiled sheet is quite popular among professional builders and architects, as well as among individual developers. The corrugated board, obtained from thin sheet steel by cold rolling, has a high bearing capacity and easily withstands even very large wind and snow loads. With proper installation, the roof covering with a corrugated sheet with an anti-corrosion coating is very reliable - such a roof will last 20-25 years without any operating costs.

An important advantage of corrugated board is the possibility of manufacturing sheets of great length. With a roof slope length of up to 12 m, the roof can be covered with corrugated board in one row without transverse joints. And any additional joint increases the likelihood of a violation of the tightness of the roofing.

Due to its low weight, roofing with corrugated board is often used when replacing old, worn-out roofing, since it is not necessary to reinforce the existing truss system under the corrugated board. Among other things, thanks to modern colored decorative coatings, the metal profiled sheet looks very attractive.

The small weight of the profiled sheet also allows you to cover the roof with corrugated board with your own hands without the involvement of builders. In addition, information on how to properly cover the roof with a profiled sheet is publicly available, and the process itself does not require many years of experience, special education and skills.

Below we will focus on the main features of the installation of this roofing material, which you need to get acquainted with before covering the roof with corrugated board.

Which profiled sheet to choose for roofing?

Before we dwell on how to properly cover the roof with corrugated board, let's briefly dwell on the rules for choosing a profiled sheet for the roof. Today, both wall corrugated board of grade C, intended for the manufacture of sandwich panels, cladding of building facades and the construction of various fences, and a special profiled sheet for mounting roofing are widespread.

Many are interested in whether it is possible to cover the roof with grade C corrugated board, which is several times cheaper than the bearing profiled sheet. On the whole, this question can be answered positively. However, the height of the trapezoid or profile wave must be at least 20 mm. For steep roofs of small buildings, you can even use C10 corrugated board, but under it you need to make a continuous crate.

However, the use of wall corrugated board, although economical, is not reliable enough. Since you are interested in exactly how to properly cover the roof with a profiled sheet, and not in the ability to save on the reliability and quality of the roof, I strongly recommend using a roofing profiled sheet. Especially if the building is being built in a region with high rainfall and high snow cover.

It differs from the wall one in that the width of the profile shelf is greater than the width of its crest. This facilitates the removal of water and snow from the roofing. In addition, corrugated roofing sheets often have additional stiffening ribs and a capillary groove along the edge of the sheet.

These design features increase the longitudinal rigidity of the profile and contribute to the removal of moisture that has fallen between the sheets of the roofing.

Having chosen a profiled sheet, you can start covering the roof with corrugated board.

How to start roofing with corrugated board?

To prevent accidental damage to the material, the transport and lifting of corrugated roofing must be carried out with the utmost precautions. After all, in case of deformation, it is almost impossible to return the original geometry to the profiled sheet. In addition, even the most minor damage to the protective coating can lead to premature corrosion of the corrugated board and reduce the life of the roofing.

If you purchased a profiled sheet in advance, then remember that you can store it in its original packaging for no more than a month. At the same time, it should lie horizontally on linings, with a height of at least 100 mm. If it is supposed to store the corrugated board for more than a month, wooden slats are laid between the individual sheets.

Before covering the roof with a profiled sheet, it is necessary to make ventilation gaps under the surface of the roofing with the help of bars of the counter-lattice. Properly performed ventilation prevents the accumulation of condensate on the inner surface of the roofing. The size of the ventilation gap should be 40-50 mm. To protect the under-roof space from drops of condensate, a waterproofing membrane is laid on the rafters, on top of which a counter-lattice is mounted.

Roof prepared for covering with corrugated board: sheathing is made, gable and cornice strips are installed

Strictly following the installation technology, two or three people can cover the roof with corrugated board with their own hands without special skills.

We begin the installation with the installation of a device for lifting corrugated board on the roof. We lift the profiled sheet from the ground to the roof along wooden logs, and only one sheet at a time.

The procedure for further work with corrugated board largely depends on the angle of the roof. Although, in theory, profiled sheeting can be used even for roofs with slopes of 2-3°, it is better that the roof slope exceeds 10-12°. In this case, we cover the roof with corrugated board with an overlap in just one wave. If the installation of the profiled sheet on the roof slope is carried out in several rows, the overlap between the rows should be from 100 to 200 mm, also depending on the angle of the roof.

Fitting corrugated sheets before roofing

Before you cover the roof of the house with corrugated board, you need to fit the coating sheets. For cutting sheets of corrugated board, it is ideal to use electric shears for metal, which accurately, evenly, without nicks and extra effort, allow you to make the desired cut. However, since we cover the roof with corrugated board with our own hands, therefore, there is no specialized tool, you can use both an electric jigsaw and a hand saw with fine teeth. To prevent edge corrosion, the edges of the cuts must be treated with anti-corrosion mastic.

It is strictly forbidden to use high-speed power tools with abrasive wheels for cutting corrugated board. Hot abrasive particles can seriously damage the polymeric protective coating of the profiled sheet.

How to properly cover the roof with corrugated board - cutting profiled sheet

In order to cover the roof with corrugated board with your own hands, you must also follow a few simple rules that will help you avoid injury during the work:

you need to work in soft shoes that will not damage the polymer coating and, at the same time, will not slip on its surface;
it is not recommended to work in windy weather due to the high windage of corrugated sheets;
it is also impossible to work in the rain, since the wet surface of the profiled sheet is very slippery and it is very difficult to stay on it even with a slight slope of the roof;
several sheets must not be lifted onto the roof at the same time, since if one of them slips off, serious injury can occur.

After laying out and fitting the profiled sheet, proceed to its fastening. Special attention should be paid to how to properly and securely fix the corrugated board.

How to properly cover the roof with corrugated board?

It is impossible to fasten a profiled sheet with nails, since such fasteners will gradually weaken under the influence of wind loads. Subsequently, this will lead to deformation of the profiled sheet and a violation of the tightness of the roof. Therefore, before you cover the roof with a profiled sheet, you need to purchase special roofing screws.

Roofing screws usually have a hex head with a press washer. The tip in the form of a drill makes it possible to fasten the corrugated board with roofing screws not only to a wooden, but also to a metal crate, and without pre-drilling holes.

The hex head allows you to tightly and securely press the profiled sheet to the crate using a screwdriver or an electric drill with adjustable rotation speed. Of particular importance are the sealing gaskets of roofing screws, made of special neoprene rubber.

In order to tightly press the corrugated board to the crate, the fastening is carried out through the bottom wave of the profile. But it is in this way that all the water from rain and snow melt flows from the roofing. Therefore, when we cover the roof with a profiled sheet, it is very important to ensure the tightness of the fastening points of the profiled sheet. The neoprene rubber of the protective pad self-vulcanizes when the roofing screw is tightened, completely eliminating the possibility of moisture penetrating under the roof. Self-tapping screws are screwed through the upper wave only when the ridge is installed.

Horizontally, the corrugated board is fixed to the crate through one wave. Vertically, self-tapping screws are installed through one board of the crate in a checkerboard pattern. On the gable overhang, fastening is carried out to each board of the crate. On the cornice overhang, self-tapping screws are screwed into each wave of the profile.

In each wave, the corrugated board is also attached in places of overlap between adjacent rows of coating. Cover sheets in places of longitudinal overlaps are recommended to be additionally fastened with special rivets.

When screwing self-tapping screws or drilling holes in the roofing, small metal chips are formed. Before the final tightening of the screws, it must be removed to avoid damage to the polymer protective coating. In addition, these shavings can interfere with a snug fit of the neoprene pad.

The great popularity of corrugated board is not unreasonable. This roofing material has a long list of advantages, where one of the main advantages is the simplicity of its installation on the roof structure. Doing it yourself is not a problem. Therefore, it is worth considering this construction process and pointing out some nuances and subtle points.

Stage number 1 - preparatory

To prepare for the installation of corrugated roofing, you need to purchase the roofing material itself. Here it is important to correctly calculate its quantity. Therefore, the area of \u200b\u200bthe roof slope is measured, and 10-15% is added to it, which can always go to waste in the process of cutting the material. But if everything is done wisely, then you can do without big waste.

To do this, the area of \u200b\u200bthe overhang of the corrugated board and the protrusions beyond the fronts of the structure are added to the area of \u200b\u200bthe slope. And if the length of the roof slopes is small, within 6 m, then each slope can be safely closed with one sheet. If the length is longer, then you can order the length of the corrugated board to the required size or carry out installation in two or three rows with material of small length.

In addition to the corrugated board itself, additional products will be needed:

Skate;
Cornice strips;
Front trims;
Planks for the valley (if present in the roof structure);
Planks adjoining to various structures located on the roofs (chimneys and so on).
Of the materials, a sealant, a waterproofing membrane (not always) will be needed.
From tools: metal scissors, screwdriver, tape measure, hammer or stapler with staples.

The preparatory stage includes the rise of corrugated board to the roof. With your own hands, this can be done quickly and easily. Why is it necessary to lay two boards on an edge so that with one edge they touch the roof parapet, with the second they rest against the ground. At the same time, the distance between them was such that the profiled sheet fell on them with upper waves in the second row.

Stage number 2 - the correct layout of profiled sheets

How to do it yourself so that the sheets of corrugated board are laid correctly? If, again, we say that one sheet will completely cover the roof slope with its length, then in this case there are no problems. You simply, starting from the edge of the roof, lay the profiled sheets on the crate.

Attention! An important point is to correctly set each sheet strictly along the line of the eaves with a ledge on the overhang.

It is sometimes problematic to do this with your own hands, therefore it is recommended to install a thread parallel to the eaves along the supposed overhang, stretched between the slats that are attached to the extreme rafters.

In the event that one sheet of roofing material does not cover the slope, then you will have to use an orderly installation. This is a more complex scheme, but you can handle it with your own hands. To do this, you will first have to lay three or four sheets in the first bottom row, and two or three sheets in the second top. All elements of the roofing must be set along the eaves and among themselves.

Stage number 3 - fixing the corrugated board

At this stage, the sheets of corrugated board are fastened to the elements of the crate. Firstly, it is necessary to indicate that the corrugated board is not fastened with nails. For this, special galvanized self-tapping screws with a press washer under a hex head are used. A rubber gasket must be installed with the composition of the self-tapping screw. They are made of neoprene rubber, which does not change its physical, technical and operational characteristics under the influence of temperature and humidity changes. And on the roof, natural loads change quickly, and besides, they are maximum at the top.

It is necessary to pay attention to the fact that the installation of self-tapping screws is carried out according to special rules and requirements. What?

At the edges of the sheets at the eaves and at the ridge, self-tapping screws are installed and screwed into each lower wave of the corrugated board. On the rest of the plane in a checkerboard pattern, while it is not necessary to attach to each row of waves, it is possible through one or even two.
The self-tapping screw must not be tightened too much, the neoprene gasket may break. You can’t screw it loose either, a loose fit of the cuff to the plane of the corrugated board is a high probability of leakage through the mounting hole.
When screwing in, the self-tapping screw must be located exactly perpendicular to the plane of the lower wave.
The corrugated sheets themselves are also connected to each other with self-tapping screws, because they are overlapped relative to their edges, but only the attachment point is the upper wave.
The number of fasteners per 1 m² is 5-8 pieces.

Stage number 4 - installation of additional elements

As you can see, it is not very difficult to cover the roof with corrugated board, and besides, with your own hands. But this is not the whole assembly process. In order for the roof structure to be considered completely ready for operation, it is necessary to install additional elements.

Cornice strips are installed directly along the cornice and are attached to the first lower element of the crate with self-tapping screws. The length of the plank is not enough to cover the entire junction line, so they are overlapped, where the displacement distance is 10-15 cm. The reason is to avoid the passage of moisture to the rafter system, if in some place water leaks through the corrugated board itself.

Mounting a skate also has its own nuances.

Firstly, it is mounted on top of profiled sheets and attached to their upper profiles.
Secondly, a solid crate must be laid under the ridge, it can be two or three boards.
Thirdly, at the place where the ridge is installed, additional waterproofing is applied to the crate in the form of a self-adhesive tape.
The elements of the ridge are overlapped relative to each other, the offset is 10-15 cm.

Installation of pediment strips is designed to close the gaps between the corrugated board and the rafter legs. The gap itself is formed by installing the elements of the crate, so its size is the height of the board (32-50 mm). The roof structure on the gables can be of two types, this is in terms of whether the sheets of corrugated board go beyond the edge of the roof. That is, whether they come out or not.

In the first case, the gable bar is a metal strip that is attached to the crate with self-tapping screws. It rests on the corrugated board with its upper edge. Usually, several planks are laid, which, like the rest of the additional products, are overlapped with the same offset. In the second case, the gable bar is a corner. It is installed in such a way that its horizontal strip covers the corrugated board.

Planks for valleys and junctions are a structure consisting of two parts: upper and lower. They are usually mounted with their own hands at the installation stage of the profiled sheets themselves. The lower one is attached to the crate, the upper one to the roofing material. At the same time, experts recommend laying waterproofing material under the corrugated board and the top bar. Some craftsmen also treat these places with bituminous mastic.

As for the elements for closing the junctions, most often ready-made metal structures are used here. For example, boxes or special caps are used for pipes, for walls, planks in the form of a corner. Installing all this with your own hands is easy.

When calculating the amount of corrugated roofing, it is necessary to take into account the working width of the sheet, and not the total, because the material is overlapped by one wave.
If roofing sheets are mounted in two or three rows along the length of the slope, then it is necessary to take into account the angle of the roof. It concerns the amount of overlap. For example, for flat roofs, the best option is 30 cm, for steep ones, 15 cm is also suitable.
It is possible to align the sheets not along the eaves, but along the ridge. Most often, craftsmen do this on steep roof slopes. It's just more convenient that way.
It is recommended to lubricate the overlapping areas with mastics or sealants on flat corrugated roofs.
If the protective coating of the corrugated board was scratched for some reason, then you should not leave the defect unattended. It is best to paint the place of the flaw with paint to match the entire plane of the roof.
Choose the color of the self-tapping screws in the color of the corrugated board, since there is such an opportunity today.

Material such as corrugated board has long been known to everyone and is used in construction in a variety of “roles” - fences are installed from it, garages and sheds are built, and roofs of outbuildings, small houses and even large mansions are covered. Decking is produced in a variety of colors, so you can see houses covered not only with sheets of the same color, but also with a combination of shades. which looks very original.

To know how to properly cover the roof with corrugated board, you need to carefully study the instructions, and then purchase high-quality roofing and consumables, prepare all the necessary tools.

It is very important that you do not need to have special professional skills to cover the roof with this material. The main thing is to follow the technological sequence of work and not make mistakes that can lead to roof leakage, which will require bringing the coating to perfection.

Advantages and disadvantages of corrugated board as a roofing material

Like any roofing material, corrugated board has its pros and cons that you need to know before purchasing it.

To positive qualities This material includes the following:

The light weight of corrugated board allows you to easily lift it to a height and, if necessary, level it at the installation site.
Optimum ratio of cost and service life of the material. With high-quality installation, the manufacturer sets a minimum operating period of 12 ÷ 15 years.
Ease of installation - the material is easily overlapped and screwed with special self-tapping screws.
Aesthetics of the coating - corrugated board, due to the variety of colors, makes the appearance of the house neat, gives it individuality.
In the relief of most sheet models, special capillary grooves are provided, which are designed to effectively drain water when laying overlapping sheets of material.

negative qualities corrugated board can be called:

High thermal conductivity of metal. Therefore, corrugated board will not protect the attic from overheating or low temperatures. If this coating is chosen, a good attic floor will be required, which implies additional costs for thermal insulation material and its installation.
In windy weather, when the wind speed is 15 m / s and above, any metal coating emits ultrasonic vibrations that adversely affect the human psyche. Therefore, in regions with constant windy weather, it is better to give preference to roofing that does not vibrate in the wind.
Low soundproofing. If the roof is not provided with heat and sound insulating material, the sounds of drops or hailstones falling on the floor will be clearly audible in the house.

Choice corrugated board for roofing

Decking can be made from galvanized metal sheets that do not have a color coating. Such sheets are most often used to create temporary or permanent sheds, or to cover outbuildings. It is also often used for building site fencing. Unpainted corrugated board has a fairly low cost, but is not very suitable for covering residential buildings, as it has low performance characteristics and is not very attractive in terms of aesthetics.

It is very popular, which has a decorative protective coating of polymer compositions. This material is more durable and able to withstand quite severe loads. Certainly this — with proper installation, which largely depends on the angle of the slope of the roof slopes.

Several types of corrugated board are produced with a protective and decorative polymer coating:

Bearing (H) - designed to cover the roof, floors and canopies.
Wall ( FROM) - used for the construction of a fence, hangars, garages.
Universal (NS) - suitable for roofing, installing fences, building garages, utility facilities, etc.

It is better to use a carrier to cover the roof, but last resort any of the above types can be used.

In addition, this material varies in height and number of waves. The height of the wave (corrugations) is indicated by a number, which is placed next to the marking of the type of corrugated board. For example, several models are presented in table:

Marking	Application	Corrugation height in mm	Metal thickness in mm	Usable width in mm
C10	wall	10	0,5; 0,6; 0,7	1100
C18	wall	18	0,5; 0,6; 0,7; 0,8	1000
C21	wall	21	0,5; 0,6; 0,7; 0,8	1000
	Roofing Wall	35	0,5; 0,6; 0,7; 0,8	1000
C44	wall	44	0,5; 0,6; 0,7; 0,8; 0,9; 1,0	1000
H60	roofing	60	0,7; 0,8; 0,9; 1,0	845

A metal sheet of corrugated board can have a one-sided or two-sided coating, but no matter what it is purchased for, it is better to choose a material that is protected on both sides.

The coating consists of numerous protective layers, the diagram below clearly shows which layers cover the outer and inner side.

External side of the roofing material:

The basis for corrugated board is a steel sheet.
Steel is coated with zinc.
Next comes the anti-corrosion coating.
A primer layer is applied to it, which serves as a preparation for the polymer.
Then comes the colored polymer coating.
A protective film (polyurethane) is often applied to the color polymer coating, which will keep it from fading and peeling.
For transportation and storage of corrugated board, it can be additionally covered with a film coating on top, which is removed after installation.

The inner side of the corrugated board is covered in the same sequence with exactly the same materials, but on some models there is no colored polymer film from the inside, while on others the sheet is covered equally on both sides. The latter, of course, have a higher cost, but their service life is much longer.

The color scale of a professional flooring is rather various. According to the most conservative estimates, the color range is represented by at least 30 shades, so choosing the right one will not be ore. The color layer on the surface can be applied by powder method or using a special polymer coating technology.

To summarize the selection criteria, we can list the following:

To make sure that the material is of high quality and produced in professional conditions, you should ask the seller for a product certificate. If it is missing, then it is better to contact another store.
The marking of the material is checked, indicating its purpose, thickness and wave height.
The appearance of the material is evaluated. It is necessary to pay attention to the evenness of the sheet, the absence of defects in the coloring and protective layer, the same shade of all sheets, the uniformity of the coating. The appearance can tell a lot about the quality of the corrugated board - if during the inspection a peeling of the coloring layer or burrs on the sections are found, then it is better to refuse the purchase.
Another criterion is to check the corrugated board for bending - high-quality material must be elastic, and if you try to bend it, it tends to return to its previous position. In this case, no trace of a fold should appear on the coating.
Type of external decorative coating - polymer or powder. The highest quality corrugated board coatings are matte and plain polyester and plastisol. Coating data must also be stated on the product certificate.
Material price. It must be remembered that you should not choose the cheapest material - it is unlikely to be of high quality. Moreover, all corrugated board has a very affordable price.

When the material is purchased, it is necessary to correctly deliver it to the construction site, as well as carefully, without damage, unload and lift it to a height.

Prices for various types of corrugated board

Decking

How to avoid damage during transport and installation of the material?

It is important to highlight this issue because damage to the corrugated board during its delivery, unloading and installation will significantly reduce the life of the future roof.

This material is made from steel sheet, which is embossed by cold rolling in special equipment.

Such material, laid as a roof, is able to withstand high wind and snow loads, but during its transportation, loading and unloading, the sheet coating can be subjected to unnecessary mechanical stress, which will lead to its damage. To prevent this from happening, you must follow certain rules for transporting, storing, carrying and lifting sheets.

Transportation of a professional flooring is made on trucks. The sheets must be stacked in piles on a rigid base of the body or on a special metal frame, which is fixed in the body at an angle.

After laying the roofing material in the car, it must be securely fastened with slings to avoid the sheets rubbing against each other when the car is moving, since this can lead to damage to the protective coating.
The car transporting the corrugated board must move at a speed of no more than 80 km / h.
It is very important to ensure that the unloading of the roofing is carried out with the utmost care. If unloading will be done manually, it is desirable that each of the sheets be removed from the stack separately, transferred and placed in the place prepared for them. It is best to prepare the flooring from boards and plywood, covered with polyethylene on top.
It is required to ensure that none of the sheets is bent during transportation, since it will not be possible to return it to its original state, which means that during coating, gaps form between the sheets that will violate the evenness and integrity of the roof.
To raise the corrugated board to the roof without harming it, you must also do it correctly:

- for accurate lifting of the material, logs will be required, which are installed at an angle to the roof - these will be a kind of "rails" for the convenience of lifting sheets;

- sheets rise to a height of only one piece;

- the laying of corrugated board on the roof itself can be done by two masters, but it is better to lift the roofing material to a height with three people - this is an additional insurance for the integrity of the material and the safety of work.

Now a few words about how not to damage the corrugated board during installation.

The maximum risk of damage to the material is added if a large area of the roof is covered, since during the installation and fastening process it will be necessary to walk on the already laid roof. Therefore, it is necessary to choose the right shoes for work - it should not only be comfortable, but also have a soft elastic sole that cannot damage the protective layer and will not slip on the roof surface. It is possible to step on the fixed roofing material only between the ribs and only in those places where the guides pass, especially if there is a large step between them.

In order for the installation to take place neatly, without unnecessary damage to the roofing material, you need to use only high-quality tools. For work you will need:

Screwdriver.
Roulette.
Scissors for cutting metal up to 0.6 mm thick.
Marker for marks.
Level.
Electric drill.
Rubber mallet.
Electric jigsaw or electric scissors.
Soft brush for sweeping away metal shavings.

It is forbidden to cut the corrugated board with a grinder. The best tool for this is electric scissors.

Features of the installation of corrugated board as a roof

In order for the installation of roofing material to be successful, it is necessary to take into account some features of the work.

Influence of roof slope on installation

Much in the process of covering with roofing material depends on the slope of the roof. It is very important to correctly position the boards or lathing bars, as well as observe the required amount of overlap of corrugated sheets.

If the slope of the slope is 5 ÷ 10 degrees, then the crate is made solid or the slats are nailed at a distance of no more than 5 ÷ 7 mm from each other.

The overlap of the sheets in this case should be horizontally in two waves, and the top to the bottom row should be at least 300 mm. And with such a small slope of the slope, the gaps between the sheets of corrugated board are most often filled with sealant, since there is still a risk of water leaking between them, especially in windy weather.

With a roof slope of 10 ÷ 15 degrees, the distance between the lathing bars is 400 ÷ 450 mm, and adjacent sheets are overlapped in one wave. The top row should overlap the bottom row by 200 ÷ 220 mm.
With a roof slope of more than 15 degrees, the lathing bars are fixed on the rafters distance of 550 ÷ 600 mm. The overlap of the sheets stacked next to each other is made in one wave, and the top row is superimposed on the bottom row by 170 ÷ 200 mm.

To make it convenient to mark and fasten the battens, it is cut out to the right size, for example, 600 mm, which will help to mount the frame under the roofing much faster.

Order of fixing sheets

It is very important to follow the sequence of laying sheets if the coating will consist of two or more horizontal rows of corrugated board.

Laying of roofing material starts from the eaves. The edge sheet is set strictly according to the building level, since the correct laying of all other elements of the roof will depend on its evenness. In addition, the stacked sheets are aligned along the lower edge of the overhang - if this method of alignment is excluded, then the lower edge of the roof will be uneven.

Upon completion of the installation of the first row, fixing the second one begins on the same side of the roof from which the first was mounted. However, some craftsmen also practice a different approach - with sequential laying of the bottom, and then the top sheet, or with the laying of a "ladder" - for example, two sheets from the bottom - one from above, that is, the top row constantly "lags behind" by 1 sheet.

The best option is if the length of the sheet is sufficient for the entire roof slope

If it is possible to purchase sheets equal to the length of the slope, then this option should be preferred - this will reduce installation time, and the roof will be more reliably protected from leakage, since there will simply be no horizontal overlaps of sheets.

Rules for fastening corrugated board

It is carried out using special self-tapping screws equipped with a press washer and a rubber gasket. To make the roof look aesthetically pleasing, self-tapping screws are usually matched to the color of the base material.

If the roof is covered with canvases that are solid along the length of the slope, then the first sheet is temporarily fixed at the top below the roof ridge by 50 mm and at the bottom, on the overhang. The sheet should protrude beyond the edge of the overhang by 40 ÷ 50 mm. The upper distance left open will become a ventilation gap and will later be covered from above with a ridge element.
The second sheet is overlapped with the first one or two waves, depending on the slope, aligned with the overhang of the first sheet and screwed with a self-tapping screw.

Subsequent canvases are laid and aligned also along the overhang and fastened together on the crest of the wave. Their fastening takes place from the eaves to the ridge with a screwing step of 500 mm.

When 3 ÷ 5 sheets of corrugated board are laid, and they are aligned along the edge of the overhang, their capital is fixed to the crate. The canvases are attached to the crate in the lower part of the wave, immediately after the overlap of the sheets, and then, passing one wave, along the bottom of the second.
If two or more horizontal rows are laid, then in the strip of their overlap with each other they are fixed with self-tapping screws along the bottom of each wave.

If polymer-coated corrugated board is installed, then after screwing in the screws, it is recommended to remove the formed metal chips in order to avoid damage to the protective coating of the roofing material. It is completely swept off the coating with a soft brush.

It is also necessary to stipulate the requirement that the corrugated board should in no case be fixed on the crate with nails or rivets, since such fasteners will not hold the canvas when a high wind load occurs. The wind can easily tear off the roofing, and the nails will remain in the bars of the crate.

Installation of additional elements

In addition to corrugated sheets, there are other elements in the roofing structure that help protect the building from the penetration of precipitation into the attic. It should be noted that the presence of even one formed or unclosed gap in the roof can seriously damage the ceiling, as well as the walls and ceiling of the house.

Additional elements of the roof include a ridge, valleys, lining of pipes passing through the roof, cornice boards and others.

Skate mount

After the installation of corrugated sheets is completed, at the highest point of the roof, its edges are covered with a ridge.

The ridge is fixed with the same self-tapping screws, through the top of the corrugated boarding waves, with a step of 200 ÷ 300 mm. In order for the fastening to become reliable, it is necessary to foresee two longitudinal boards on both sides of the ridge when installing the crate.

When installing the ridge, it must not be pressed closely to the highest point of the roof - there must be a ventilation gap between it and the inner surface of the ridge element.

If a semicircular type of ridge is installed, then special plugs are installed and fixed on its end sides.

Since the skate is assembled from separate elements, they are also overlapped. Simple skates, having the shape of an angle, should have an overlap of 120 ÷ 150 mm, and semicircular (tiled) - 100 ÷ 120 mm, with their alignment along the stiffeners.

Take advantage of our article.

Finishing the gable part of the roof from corrugated board

To exclude the possibility that the corrugated board will be torn off by the wind from the end side, the gap between the sheets and the crate is closed with wind angles or planks, which are superimposed on one side of the corrugated board, and on the other - on the first rafter facing the end of the building. The bar is also fixed with self-tapping screws with a pitch of 400 ÷ 500 mm.

Facing the end part of the roof. 1 - wind bar, 2 - self-tapping screws

Since the planks are also made up of individual elements, they are overlapped by 70 ÷ 100 mm.

Cornice fixing

The eaves are installed before the flooring of the main roofing material. It plays both a decorative role, closing the side connections of the truss system, and a functional one, preventing splashes from falling onto the wooden parts when water flows from the roof into the drain. In addition, brackets are attached under the cornice or on top of it for laying the gutter.

Most often, at first, the drain brackets are fixed to the crate with self-tapping screws at a distance of 500 ÷ 600 mm from each other. They are lowered below the crate by 100 ÷ 150 mm.
Then the gutter is installed on the brackets.
After that, a cornice strip is installed and nailed or screwed to the bottom board of the crate.

Sheets of corrugated board are laid on top of the cornice strip, and must be leveled so that the water draining from them directly falls into the fixed gutter

Valley installation

The installation of a valley is not required for every roof, but only where it has a complex configuration with profile fractures. If there is a conjugation of two planes, turned downwards, then mounting this element is indispensable.

The valley consists of two parts - internal and external.

The inner part of the valley is laid even before the roofing. It is fixed at the junction of two roof planes and fixed to the crate with roofing screws in increments of 350÷500 mm. Separate parts of a long valley are laid, starting from the eaves and rising to the ridge, with an overlap of 150 ÷ 200 mm.

After the sheets of corrugated board are laid (with a shift to the inside of the valley by 80 ÷ 100 mm), a layer of porous sealant is laid between them and the inside of the valley. This material will prevent leakage during rain. Then the corrugated board through the bottom of the waves with a step of 400 ÷ 500 mm, together with the lower part of the valley, is screwed to the crate with self-tapping screws.
After that, silicone sealant is applied to the edges of the sheets of corrugated board, and the outer part of the valley is laid on it. Just like the inner part, it is composite, so its parts are overlapped by 100 mm, starting installation from the cornice and anointing the joints with sealant.

After that, the outer part of the valley is screwed with screws to the corrugated board.

Fastening snow retainer

Snow guard- this is an element that will not allow a sharp descent of snow from the roof in the spring, delaying it and giving time to melt and drain with water or evaporate.

Snow guards There are two types - these are peculiar strips in the form of corners, scrolling in a checkerboard pattern, or horizontal tubular barriers installed in special brackets.

The brackets are attached to the corrugated board surface at a distance of 900 ÷ 1000 mm. Then, special tubes with threads along the edges are inserted into the holes in them, onto which, after their installation, metal plugs are screwed.

Both brackets and slats snow retainers fastened through the corrugated board to the crate. When fixing the planks, they are screwed through the top of the wave, so gaps are formed between the plank and the corrugated board, through which the melt water will leave.

Wall profile covering the joint between the wall and the corrugated board

If the corrugated roof is adjacent to the wall, then the joint between them must be closed to prevent leakage. For this, there is a special figured bar - a wall profile, which is mounted on the wall using anchor fasteners, and on the metal profile - with self-tapping screws screwed into the crest of the wave.

Silicone sealant can be used to seal the junction of the plank with the wall. It is also advisable to make a strobe in the wall in order to hide the upper curved edge of this profile into it. After installation, the strobe can be sealed, for example, with cement mortar or tile adhesive for outdoor use.

Seals for corrugated board

Sealers are used in roofing to close gaps at the joints of the coating with the wall, in places of "fractures" of hipped roofs and under the ridge.

Seals usually have an adhesive layer on one side, covered with parchment, which is removed before installation, and the material is glued in the right place.

Making the passage of the pipe through the corrugated board

If a chimney of a stove or fireplace, or a ventilation duct, passes through the corrugated board, you will have to work on it. But before do work on the external finish of the joints, it is necessary to install around chimney inner apron, which mounted before laying on the corrugated boarding crate.

An apron is installed around the pipe from separate metal adjoining profiles. On the walls of the chimney, using a marker, a line is marked along which a strobe will be punched to bend the upper edge of the adjacent profiles into it. Then it must be thoroughly cleaned of dust and rinsed with water.

After that, the so-called tie - stripe a metal sheet having flanges, which are mounted from the pipe to the eaves. A tie is needed to drain the water that accumulates behind the pipe during rain.

After that, the lower part of the apron must be fixed for sealant, on the crate and a tie laid on the sides of the pipe, and install the upper edge in a strobe, also on sealant. When installing the parts of the adjoining plank, they must overlap each other by 150 mm.

After the internal work is completed, the installation of corrugated board is carried out. When the roofing material is laid around the chimney pipe, the outer apron strips are mounted, which are fixed on the pipe and on the ridges of the corrugated board on the roof.

The general sequence of roofing with corrugated board

So, knowing how the installation of all additional elements and the corrugated board itself is carried out, we can consider the sequence of work on covering the roof with this roofing material.

The first step is to cover the truss system. It is laid from the cornice, horizontally overlapping the slope by 100 ÷ 150 mm. The film is fixed with a stapler with staples on the rafter legs.
On top of the film to the rafters are nailed the bars of the counter-lattice, which will create the necessary ventilation gap between the film and the roofing material. The size of the bars should be 400 × 500 mm, that is, the ventilation gap will be 400 mm.
A crate of slopes is arranged perpendicular to the counter-lattice. Here it is necessary to provide additional ridge boards - they are located on both sides of the roof ridge. Also, additional boards or bars are mounted around the chimney and at the joints of the roof planes to secure the valley (angle inward) or ridge element (angle outward).
Further, wind boards are fixed on the gable sides of the roof.
Then brackets for the drain gutter are fixed on the bottom board of the crate, and the gutter itself is laid.
A cornice plank is nailed to the extreme board of the crate.
The next step is to fix the inside of the valley, if necessary in the roof structure.
Then you can proceed to the arrangement of the waterproofing of the chimney pipe. A tie is laid along its edges, going to the cornice - it is fastened over the cornice strip. Next, install sealed elements of the inner apron adjacent to the pipe.
Having dealt with the internal additional elements, which should be under the roofing material, they proceed to the installation of corrugated sheets. To pass the pipe in one or two sheets, an opening of the required size is measured and cut out with the help of electric scissors. The edges of the corrugated board should cover the parts of the apron fixed on the crate and come close to the pipe. It is possible to leave a gap of 50 ÷ 70 mm.
Further, at the junctions of the two sections of the roofs, the outer part of the valley is fixed.
After that, metal elements of the ridge are fixed at the highest point of the roof.
The last step from the gable side to the corrugated board and the wind board is fixed windproof corner.

So, as you can see, there is nothing supernatural in laying such a roof. Having studied the sequence of work and the technology of their execution, enlisting the assistance of reliable assistants, acquiring the necessary material, preparing tools, you can safely start covering the roof with corrugated board on your own.

And at the end of the publication - a useful video with the intricacies of the process of corrugated roofing.

Video: important nuances when laying corrugated board as a roof

In recent years, for roofing, along with expensive materials, profiled flooring, or corrugated board, is increasingly being used, which is not only attractive and reliable, but also allows you to cover the roof yourself, without having special knowledge and skills for this. Decking is produced with a polymer coating of various colors, its cost is much lower than other analogues, which, however, does not affect the quality.

In our article we will tell you how you can cover with corrugated board, taking into account all the features of this process.

Transportation of corrugated board

This roofing material, despite its strength and durability, needs proper and careful transportation. If the profiled sheet is loaded incorrectly, it will deform during transportation, and this will lead to the fact that the cost of the work will increase.

It is possible to qualitatively block the roof with the help of corrugated board, taking a material with a thickness of half a millimeter. This will preserve all the necessary performance characteristics, the roofing will reliably protect the house from precipitation, strong winds, and heat loss.

In order to organize the correct transportation of corrugated board, use simple tips:

the material should be loaded only on a solid and solid base; ordinary wooden logs are excellent for this, which will be longer than the sheets themselves;
the cargo during transportation must be strengthened with slings so that there is no friction of the sheets during transportation;
the recommended speed of transport should be up to eighty kilometers per hour.

Subject to the above conditions, the corrugated board will be delivered undamaged. Care must also be taken when unloading. It is desirable that the sheet be carried by two people; it is strictly forbidden to drag it or bend it.

When covering, it is important to properly lift it up. It also has its own technology, which is as follows:

the material must not be lifted in windy weather to avoid damage;
logs stretch from the roof to the ground, along which the sheets rise up. It is desirable that this work be performed by three people;
lifting should be carried out exclusively on one sheet.

Materials and tools for laying corrugated board

Covering is quite simple, for this there is no need to purchase expensive tools, a lot of additional materials. We will only need metal scissors that can cut a sheet up to 0.6 mm thick, we will also need a hacksaw with fine teeth, a jigsaw, you can also use electric scissors.

But abrasive wheels and grinders are strictly prohibited, they can cause severe damage to the metal.

Features of laying corrugated roofing

The technology of corrugated board coating has some features, which we will now list:

The roof rafters are covered with a waterproofing membrane and heat insulators to prevent heat loss. This is especially true for residential attics, in which such losses can be significant.
On the inside of the house, it is necessary to hem a layer of vapor barrier and tightly seal all its joints. In general, during such work, it is necessary to ensure that there are no gaps, gaps, defects. If found, they should be carefully eliminated.
When covering with corrugated board, it is very important to create a "cold triangle", that is, to ensure the movement of cold and warm air flows.
When constructing a roof, it is important to remember the need to create through slots for air to escape, which are made in the eaves.

It is laid only on a layer of waterproofing. It is made from a wooden beam with dimensions of fifty to fifty or from a board 32x100, the whole tree must be treated with antiseptics.

Important! A counter-lattice of timber is nailed to the rafters, on top of which the boards are laid. Where important nodes pass, that is, valleys, chimneys, fences, a continuous crate should be made in increments of fifty centimeters.

Choose the angle of inclination

To cover the roof with corrugated board, it is necessary to accurately determine the angle of inclination in advance, it depends on what the overlap and fastening of the material will be:

An overlap of two hundred millimeters is recommended at an angle of up to fourteen degrees.
If the angle is up to thirty degrees, then horizontal and vertical overlaps are recommended to be treated with a waterproof silicone sealant. At angles of more than thirty degrees, the overlap is preferably within one hundred and seventy degrees.

Scheme for selecting the angle of inclination for rafters.

The type of crate also depends on the angle and height of the corrugation:

at angles up to fifteen degrees, you can use C21 corrugated board, the overlap will go in two waves, and the crate will be solid;
with the same angle and C35 corrugated board, the crate pitch is three hundred millimeters, the overlap goes into one corrugation;
sometimes, with corrugated board C44 and more, the step of the crate reaches five hundred millimeters. In general, in this case, the step can be up to 650 millimeters.

Roof covering

The process is quite easy, now we will talk about the main stages of this work.

First, you should purchase soft shoes so as not to damage the sheets of corrugated board. It is necessary to try to step only on the deflections of the wave at the points of attachment to the crate. You will also need protective gloves for your hands, which will protect them from cuts during work.

After the preparatory work for the installation of the crate and the heat and waterproofing of the roof, we begin. For this we use special self-tapping screws with rubber seals that will not damage the material.

The chips formed when tightening the screws should be removed immediately - this way it will begin to rust quickly, and this will lead to damage to the flooring. Self-tapping screws are screwed only into the wave.

The norm for fastening corrugated board is the use of six to eight fasteners per square meter of material. Follow the rules for installing a profile sheet for roofs:

when laying adjacent sheets, it is necessary to ensure the displacement of fasteners for joined elements (waves) by five millimeters;
fastening is carried out from the side of the wind slats in each individual crate;
the fastening step should not be more than five hundred millimeters, so that the roof is strong and reliable;
sheets must be attached to the upper and lower boards of the crate in each trapezoid (wave).

Nails cannot be used during installation, just like aluminum rivets, they cannot ensure the stability of the roof under strong wind loads. It is not recommended to use gas or electric welding when working with corrugated board.

When covering the roof with corrugated board, you need to know some of the subtleties of the work. Laying should be carried out parallel to the cornice, while the overhang is approximately forty millimeters. In the event that the sheet is shorter than the slope, it can be laid along the length of the roof in rows.

Before laying, the roof lathing is carefully treated with special tools (to protect the wood from mold, insects), after which it is necessary to perform work on hydro and thermal insulation.

The sheets are only overlapped here, all remaining gaps are filled with bituminous sealants. When fastening to the crate, it is necessary to use self-tapping screws with rubber seals, while the pitch of the crate depends on the angle of the roof slope in the region of twenty to forty millimeters. As the angle increases, the distance between the individual rails should also increase.

An important condition is the presence of a ventilated space between the stacked profiled sheet and the waterproofing layer of the roof. In addition, experts recommend that after cutting the sheet, treat the sections with a primer.

That's all the secrets of installing corrugated board. Such work can be done in a couple of days by two people who do not have special knowledge. Why not try it for you too!

For a comfortable stay in the house, it is important to make a high-quality and reliable roof with a good coating. To date, one of the best roofing is corrugated board. It reliably protects the roof from leaks, collapses, provides tightness in the under-roof space. And the most important thing is that it is environmentally friendly. However, the correct installation work plays an important role. Only in this case, the corrugated roofing will serve you for many years. This article will provide detailed instructions on how to cover the roof with corrugated board with your own hands, as well as video and photo materials.

As mentioned at the beginning of this article, corrugated board has a lot of advantages, which makes it an indispensable roofing material. You can also note other positive aspects of this material:

The profiled structure of the sheet has a high bearing capacity.
The lightness of the material greatly simplifies the work with it.
After laying the sheets on the roof, no joints are formed. This ensures the tightness of the coating.
Due to the special polymer coating, the material does not corrode, and as a result, its service life increases.

Note! Laying corrugated board on the roof should not cause any special problems, and at first glance, everything may seem extremely simple. However, during installation work, no flaws and inaccuracies should be allowed.

For the transportation of corrugated board, specialized transport is required. Sheets must only be laid horizontally. It is also recommended to tighten them with slings, after laying them on a hard and even surface. There are also special requirements for the driver. It is necessary to drive the car without sudden braking and turns. Failure to do so may result in damage to the material on the way to its destination.

In addition, it is important to ensure high-quality storage of corrugated board. The base must also be level and firm. If it's time to lift the sheets to the roof, then you need to do this with the help of a log. Their length should correspond to the height of the roof from the ground. You can lift several sheets at once.

Note! If the weather is windy, then it is impossible to lift the sheets onto the roof.

Today, such types of corrugated boards are known:

Mark C. The canvas has a sinusoidal or trapezoidal shape. If you decide to perform a decorative roof finish, then this option is just the way.
RS brand. It is used both for laying on a roof, and on walls.
Mark N. This model is equipped with additional stiffening ribs.

It is very important to know what slope angle is allowed for a particular product. Each manufacturer develops individual instructions. Therefore, when buying, you should ask for instructions, which is called the so-called "Installation of the roof from corrugated board instructions." Based on this, it is important to consider the future slope of the roof. Knowing the slope will help you calculate how much overlap each sheet should have. Below are some calculation options:

A slope of less than 15° will provide an overlap of 200 mm or more.
A slope of 15 to 30 ° will provide 150–200 mm and no more.
If the slope is less than 12 ° or the roof is flat, then each seam and joint should be carefully sealed. Otherwise, the roof will not cope with its functional responsibilities.

Calculation

Before buying material, it is important to calculate the number of sheets. This requires information regarding the width and length of the slope, as well as what brand of corrugated board will be used. To calculate, you can use a special program or draw a roof on a reduced scale. This will help to perform almost accurate calculations. It should not be forgotten that the sheets are overlapped. Depending on the angle of the slope and the grade of the profiled sheet, the overlap will differ. So you will find out how much the length and width of the sheet will be “eaten up”. Moreover, do not forget to add an overhang to the cornice, which can be up to 30 cm.

Note! It is necessary to purchase all additional elements in advance, for example, valleys and slats. They will be fixed in places where the slope has a certain kink, from the end, on the ridge and in other similar places.

Each sheet is attached to the crate with self-tapping screws. This is the only way to ensure reliable coverage. Fasteners are subject to special requirements. So, they must be made of galvanized steel. In this case, each self-tapping screw must have a special gasket made of elastomer or neopreon rubber. This rubber will provide a hermetic docking of the self-tapping screw with the profiled sheet. Due to this, moisture will not penetrate the wooden elements of the roof, which means that rotting of the supporting structure will be prevented.

The following technical parameters are presented for self-tapping screws:

Size 4.8x32mm, 4.8x60mm and 4.8x80mm.
The presence on the cap of a protective and decorative coating in the form of powder paint and a layer thickness of 50 microns.
The surface is treated with electrolytic galvanization with a thickness of 12 microns.
The presence of a protective gasket made of elastomer for profiled sheets and for valleys made of aluminum sheet.
Self-tapping screws should contain stabilizers that do not allow the negative effects of ultraviolet rays.

Note! When buying coating sheets, purchase one color and self-tapping screws. This will give the aesthetics of the entire roof.

It should also be mentioned about special seals, which are made of foamed polyethylene and polyurethane foam. The sealant is placed between the sheet and the crate. It is believed that a strip seal with a rectangular cross section is universal. But it will be much more effective to use those seals that repeat the shape of the profiled sheet.

The presence of a seal reduces the noise of a metal roof, increases the quality of the thermal insulation of the cake and increases the service life. A special adhesive is applied to the strips of the seal on both sides, so its installation is greatly simplified. It is very important that the sealant be perforated for ventilation in the under-roof space.

Note! The presence of a seal eliminates the large gaps resulting from the fit to the roof structure of the sheet. Birds, insects and cold air often get into these gaps. The special properties of the sealant material make it bioresistant and moisture resistant.

Immediately before the installation of profiled sheets, hydro and vapor barrier is laid. To make a vapor barrier, you can purchase a special film or roofing material, in extreme cases. The vapor barrier is attached to the crate. It is recommended to lay it from the lower edge of the roof. Due to this, each subsequent layer will be lower and moisture will not penetrate to the wood.

Note! If the brand of corrugated board S-8, S-10 or S-20 up to 0.5 mm thick is used, then the crate must be continuous. In all other cases, the step of the crate is selected individually from the characteristics of the roof.

Separately, it is worth mentioning about the layer of insulation, which will save 25% of heat. Those roofs on which corrugated board is mounted are advised to use matte insulation. The result is a roofing cake:

A layer of vapor barrier film.
Insulation.
The final waterproofing layer.

When making this “pie”, a “cold triangle” should be organized. Its presence will ensure a good passage of warm and cold air through the cracks in the cornice and ridge. So, natural ventilation will be created, which will prevent the formation of condensate.

The laid waterproofing layer will retain all the properties of the insulation. Otherwise, with strong moisture on the roof, an ice crust, dampness will form and, as a result, the process of wood decay is inevitable. For this reason, the material for each layer of the cake must be chosen carefully. It must be of high quality.

In order for all the work to go smoothly and without failures, take care of the availability of the necessary tools in advance:

rope;
roulette;
screwdriver;
a hammer;
metal scissors;
construction gun with sealant;
marker or pencils;
construction stapler;
drill.

Note! Profiled sheets are cut cold, as the polymer coating is not resistant to high temperatures. It is better to use scissors for metal or a jigsaw. At the same time, treat each cut with an anti-corrosion primer. This will increase the life of the coating.

Laying scheme

The sheets are overlapped on the lower edge of the roof, and the screws are twisted into the bend of the wave. Compliance with a specific installation scheme will create a reliable roof. First of all, under the valley plank at the level of the crate, a dense flooring is made from the groove at a distance of 60 cm from both sides. The lower boards of the valley are mounted with an overlap of 20 cm. The bottom plank is fixed from the edges with nails, and the final fastening is carried out together with the roof. If the slope is gentle, then sealing mastics should be used here.

Under the ridge, the bottom bar is wound up by 25 cm. A profiled or universal seal should be laid between the profiled sheet and it. As for the installation of end boards, it is better to fix them above the crate, then it will be possible to fix the end plate. This structure will be called the wind corner. After that, a cornice strip and filing with corrugated board are installed. It is mounted below the profiled sheet.

Installation of sheets will depend entirely on the type of roof. For example, if the slope is gentle, then a longitudinal seal is used and overlapped by one wave. If the slope is a steep compactor, it is not necessary to use.

Note! If you have a hip roof, then the installation begins with the hip itself. A cord is stretched along the cornice and each subsequent sheet is aligned along it. It is unacceptable to do this at the end of the ramp.

There are two methods for laying sheets of corrugated board on the roof:

Vertical direction. In this case, the first sheet with temporary fastening is laid below. Similarly, the sheet is mounted on the second row. Next, two sheets are stacked side by side, a square of 4 sheets is obtained. More sheets are stacked to it and so on. This method is in particular demand if the roof is equipped with a drainage groove.
Another method of stacking sheets is to make a block of 3 sheets. First of all, 2 sheets are laid on the first row. Between themselves, they are securely fixed, and the 3rd sheet of the 2nd row is joined last. This block can be fixed while aligning with the eaves.

Note! No matter which sheet stacking method you choose, it is important to pay special attention to each docking point. It is on this that the reliability and quality of the roofing will depend.

For each sheet of corrugated board, 7-8 self-tapping screws are required. They need to be twisted into the bottom wave. As mentioned above, the material is overlapped both vertically and horizontally. The overlap will depend on the angle of the slope. From what place should the sheets be laid? If the roof slope has a rectangular shape, then it is possible from any end along the cornice line. If the shape is a trapezoid and a triangle, then first of all it is important to think over the laying scheme. However, the first sheet is mounted in the center, and then the sheets are stacked symmetrically on both sides.

If a drainage system is planned, then the corrugated board is mounted along the eaves with an overhang of 60 cm. If it does not exist, then the overhang is carried out according to the material grade:

NS-20 - up to 10 cm.
S-44 and NS-35 - up to 30 cm.

So, align the first sheet along the cornice and the end of the roof. After that, it is fixed with a self-tapping screw at the top. Each next sheet is fastened along the longitudinal side of the sheet. It is pre-aligned with the eaves, and then fastened with the crate. According to this scheme, row after row is assembled.

The installation of the material is carried out so that a frontal overhang 7 cm wide is formed. At the eaves, the sheet is fixed at a distance of 30–40 cm, and the remaining rows of self-tapping screws can be staggered in increments of 1 m. . On a longitudinal overlap, fasteners are located at the top of the profile at a distance of 300 to 500 mm.

The next step is to install the ridge and the end plate. According to the standard, the end plate is 2 m long. If the length is not enough, then it overlaps. The fastening of the strap is carried out from the roof overhang to the ridge.

Note! When mounting the end strip, make sure that it overlaps at least one wave of the sheet. Self-tapping screws are twisted in steps of 1 m to the profiled sheet.

After that, it remains to make the last node of the roof - the ridge. Only smooth ridge elements should be used here. A number of experts recommend laying a special ventilated seal between them. If the sheets are corrugated, then a ridge seal is used.

At the end of the roofing work, a junction bar is installed with profiled sheets. They are an element with a length of 2 m. They overlap up to 20 cm. The fasteners are made with self-tapping screws from the side of the roofing sheets. Mounting pitch 40 cm.

Note! When organizing the adjoining of the roof to the wall, a special sealant should be used. It is laid between the joint strip and the upper edge of the corrugated board.

To prevent snow and rain from getting into the cracks, a longitudinal seal is also laid to the side junction. If the roof is steep, then such a seal is not needed.

In conclusion, let's summarize:

It is very important to pay attention to the transportation of roofing material.
The sharp edges of the sheets can cut your hands, so you need to work with protective gloves.
It is necessary for three people to lift the sheets to the roof. It uses two guides.
The installer must wear shoes with soft soles so as not to scratch the surface of the sheets.
If the surface is accidentally scratched, then these places must be treated with paint for polymer coatings.
You can step on the sheets only in places of the crate.

So, we are convinced that corrugated board is an excellent material for roofing. However, it is important to remember that it can serve for a long time and with high quality only if the installation and calculation technology is followed. If you have your own experience in this construction industry, then write comments at the end of this article. It will be equally useful to pay attention to the photos below. On them you can consider the intricacies of performing work on overlapping the roof with profiled sheets.