How to properly cover a roof with ondulin. Roof covering with ondulin Gable roof made of ondulin

The final and very important stage in the construction of the building frame is the arrangement of its roof with roofing material. Currently, due to its attractive performance characteristics, ondulin, otherwise called Euroslate, is becoming increasingly popular among professional builders and home craftsmen.

Its production does not use asbestos, which is harmful to health, and the material is environmentally friendly. In addition, it has a low price and long service life. It is quite possible to do the work of laying the coating yourself, you just need to know how to do it correctly. Let's evaluate the properties of Euro slate together and learn how to properly cover a roof with ondulin.

Ondulin roofing can be very attractive

Properties and choice of ondulin

Ondulin as a roofing coating has a number of undoubted advantages. Produced using the latest technologies based on bitumen resin mixed with cellulose and other additives, the material prevents the development of pathogenic microflora and is not of interest to rodents. The soft covering perfectly absorbs sound and noise from raindrops drumming on the roof, which will not be transmitted to the living quarters. Its advantages are environmental friendliness, low weight and ease of installation. Comparative characteristics of ondulin and another popular material - metal tiles are summarized in the following table:

Comparative characteristics of ondulin and metal tiles
Comparative characteristics	Ondulin	Metal tiles
Useful width, cm	83	110 - 112
Sheet length, cm	200	50 - 1000
Coating thickness, mm	2,4 - 3,2	0,45 - 0,5
Assortment of colors	no more than 5 options	more than 40 options
Base for roofing material	preferably solid base	step lathing with a step equal to the wavelength of the coating
Moving is not recommended	Limited movement is allowed, preferably wearing rubber-soled shoes
Fire resistance	Flammable	Does not burn
Raw materials for production	Fiberglass impregnated with bitumen and additives of hardening resin and paint	Thin sheet hot-dip galvanized steel with polymer coating
Density, kg/m2	3,1 - 3,4	4,0 - 4,5
Color fastness	Color fades and fades	Slight color change due to exposure to sunlight

From a comparison of technical characteristics it is clear that the materials differ slightly. Unlike metal tiles, ondulin is a flammable material, since its constituent components are easily flammable. This makes it impossible to use it in kindergartens, clinics and other similar institutions.

Many people have to decide which roof is better: metal tiles or ondulin? The answer depends on the specific conditions in which the operation will take place, the design features of the building and many other factors.

Offer of ondulin in the store

A roof made of metal tiles will last more than twice as long as one made of Euro slate. However, working with ondulin is much easier, it is easy to cut and lay, and it is impossible to cut yourself with it. The material consists of the following components:

• cellulose fibers;
• pure bitumen resin;
• polymer impregnating materials;
• fillers and coloring components.

To impart strength, the dried cellulose base is treated under high pressure and temperature with a purified bitumen composition. It is applied on both sides, which gives the product good elasticity and hardness. The material has a number of undoubted advantages; you can put it on an old roof with your own hands.

There is also a variety of ondulin called onduvilla. The sheets of this material are made in the form of transverse stripes and in appearance successfully imitate a roof made of natural tiles. You can see one example in the photo.

Installation of onduvilla roofing

Calculation of the amount of material on the roof

It is not difficult to calculate how much ondulin to lay on the roof. Calculating the required amount of material is simplified if the roof was previously covered with gray slate. Standard sheets of ondulin correspond to it in geometric dimensions, that is, they should be taken in the same quantity as regular slate.

In general, to determine the material needed to complete the work, it is necessary to divide the roof area by the usable area of ​​one sheet of Euro slate, which is determined by multiplying its length by its width, excluding the amount of overlap. It is better to cover an old roof made of ordinary slate with ondulin, and the calculation here is the same.

Calculating the roof area of ​​a complex shape can be done by remembering a school geometry course. To do this, the surface is divided into trapezoids, triangles, squares and other geometric shapes, their area is determined by formulas and summed up. Having determined the required number of euroslate sheets, it should be increased by approximately fifteen percent to compensate for the inevitable trimmings. Fastening of ondulin sheets is carried out using special nails with wide rubberized heads, included in the delivery package of the coating.

What additional elements will be required?

When laying the material, open areas are left where adverse environmental influences are possible. In order for the finishing to acquire an attractive appearance and to prevent leaks, it will be necessary to install so-called additional elements, such as wind strips, cornices, and valleys. They also perform decorative functions. The highest point of the building structure is the ridge, which also needs to be protected with a specially designed element.

Installation of additional elements on an ondulin roof

To equip it, ridge elements made of ondulin are installed with an overlap of at least twelve centimeters and fixed with nails in places of contact with the waves of Euro slate. Here you should lay a special adhesive tape to prevent snow from blowing in.

The roof ends along the gable overhangs (gables) can be covered with the same ridge profile or special elements can be used. They are mounted from bottom to top with an overlap of about 150 mm. A sealing tape is installed under the cornice and wind strip. It is also placed under the overhangs of sheets of material. This prevents snow drift and small birds and flying insects from entering the attic.

Options for additional elements for ondulin and onduvilla

The valley details are a mirror image of the ridge strip. Unlike other additional elements, the food is installed before the installation of the main covering sheets. Underneath it, a sheathing base is preliminarily constructed from two boards located along the valley line. It will also not be superfluous to lay a special waterproofing gasket under the valley.

Mounting elements for ondulin roofing

Additional elements give the roof surface a complete appearance; they are manufactured using the same technology as the main material and have the same service life. Their color does not fade over time from direct sunlight.

How to properly cover a roof with ondulin with your own hands

In order to properly cover a roof with ondulin with your own hands, you must carefully follow all the technological details of performing this work. This roofing material is flexible, so it is easy to install in difficult areas with bends and transitions. Laying is carried out according to the scheme on a pre-fabricated sheathing.

You should work in the absence of precipitation, but not in extreme heat, as deformation of the material occurs at elevated ambient temperatures. In addition, when laying ondulin, you cannot walk on it, as it can be damaged under the weight of a person.

The resulting surface has high noise and sound insulating qualities. The light weight of Euro slate allows it to be transported to the place of work using a passenger car, and installation can be carried out independently without the involvement of assistants.

Installation of roof sheathing

Before laying the sheets, the sheathing is installed. It is a structure made of wood for fastening roofing material. In addition, the problem of ensuring uniform load on the base from the weight of snow is solved. This is a very important stage in the work process.

The lathing for installation of ondulin is ready

The material for the manufacture of the structure is coniferous wood, since it contains a high percentage of resin, which prevents the development of decay processes. The wood must be well dried, and the humidity level cannot exceed twenty percent.

Installation of the roof sheathing is carried out taking into account the slope of the slope. If its value does not exceed ten degrees, then a continuous sheathing is made from wooden boards, particle boards or plywood sheets, since the structure in this case experiences heavy loads when snow and other atmospheric precipitation falls.

When the slope angle is more than ten, but less than fifteen degrees, the pitch frequency of the sheathing is allowed up to forty-five centimeters. Placing the boards in increments of sixty centimeters is done if the angle of inclination of the slope exceeds fifteen degrees.

Lathing can be done on an old roof

To speed up and facilitate this work, a special template is made that allows you to install structural elements at the same distance and strictly parallel. The quality of the sheathing ultimately determines the service life of the roofing covering.

Scheme of laying ondulin on the roof

Laying ondulin on the roof is carried out according to a certain pattern. Installation always begins from the bottom with the sheets overlapping in one wavy bend of the coating. The first element is strengthened in such a way that its edge extends beyond the cornice by an amount sufficient to remove atmospheric moisture.

Sequence of installation of ondulin sheets

Fastening is carried out using special nails; twenty of them are required per sheet of Euro slate. The fastening material is made of steel with carbon additives and is equipped with a rubber head. Starting from the second, all even rows are shifted and laid from half the sheet. According to this scheme, the roofing covering is installed (up to the ridge connection of the slopes).

Fragments of roof installation from ondulin and onduvilla

An additional profile from the same company that manufactured the Euro slate is mounted on top of the ridge. Such profiles are installed on the valley, which is the joints of different surfaces of the coating. To ensure reliable waterproofing of roof overhangs, curved sheets of ondulin are nailed to the roofing board, or special gable elements are installed there. To complete the work you will need the following tools and materials:

• measuring tape, meter ruler and pencil for marking;
• hammer and hacksaw for cutting sheets;
• wooden beams treated with antiseptic;
• waterproofing material;
• drill and screwdriver for attaching the sheathing.

Installation of universal filler

Maintenance of the finished roof

Caring for a roof covered with ondulin is not particularly difficult. To extend its service life, the coating should be regularly cleaned of dirt and debris. Over time, a change in the original color of the surface may occur. To restore an attractive appearance, the coating is painted. Following these simple care rules will allow you to achieve a long service life without loss of performance:

• In spring and autumn, a visual inspection of the coating is carried out;
• overgrown tree branches that can cause damage are cut off;
• it is necessary to clean the roof of leaves that have fallen in autumn, as they may begin to rot;
• The drainage system should be kept in full working order, as it does not allow moisture to accumulate on the roof elements.

Onduvilla coating imitates natural tiles well

Concluding the above, we note that the name “Ondulin,” which is somewhat unusual for a Russian person, is the name of a French company that began producing this material immediately after the end of World War II. The post-bust construction boom made the low-cost roofing product phenomenally successful, and the company greatly expanded its production capacity.

In 1994, an ondulin production line was launched in Nizhny Novgorod; the quality of the products produced there is no different from the original ones. The high performance characteristics of this material have been tested by time, and it enjoys great success in the domestic construction market.

The roof is an important element of any structure, so it is very important to select the appropriate material for covering the roof and lay it correctly. Of course, the choice of material depends on the purpose of the constructed structure. So, tiles will look great on an expensive cottage. The shed near the house can be covered with roofing felt. If we take, for example, a country house, then ondulin is perfect for it - a beautiful roofing material that combines an affordable price and high performance advantages with ease of installation.

Most of those who have at least once been involved in construction believe that ondulin is precisely the material that can easily be laid by one person, because. These advantages relate to the ease of working with this material. However, it has other equally important advantages, consisting of:

• affordability, since you can purchase it for 400-450 rubles per sheet;
• no noise in the rain;
• external attractiveness.

Having decided to cover the roof with ondulin, we must not forget about its disadvantages:

• durability not exceeding 20 years;
• high burnability in the sun, which is especially typical for green sheets.

What kind of roof can ondulin be laid on and what should the roofing pie consist of?

The versatility of the material allows it to be used on any type of roof. As an example, let’s take the classic version of country houses, which have a steep gable roof and are not intended for year-round use, and therefore do not have insulation. The sheathing in such houses often has a large pitch, since the significant steepness of the roof implies the absence of significant loads: snow and rainwater roll off from there almost instantly.

In order to provide sufficient hydro- and wind protection of the roof space, so that condensation does not form, causing rotting of the rafter and sheathing material, the roofing cake must include (in order, starting from the inside):

• waterproofing material;
• counter-lattice;
• sheathing;
• ondulin sheets.

The procedure for covering a roof with ondulin

The process of arranging a roof consists of operations performed in strict sequence.

Installation of waterproofing material

The waterproofing material, which may be, for example, the Favorit A film, is fixed along the plane of the rafters. Such a vapor-permeable film is necessary to:

• ensure the evacuation of vapors from the under-roof volume;
• protect the attic from atmospheric moisture and wind penetration;
• increase the tightness of the entire roof.

Laying the waterproofing should start from the bottom and make an overlap of 15 centimeters.

Laying counter-lattice and installing sheathing

The counter-lattice can be made of 50 x 30 mm bars laid along the rafters. It plays the role of a ventilation gap between the waterproofing and ondulin.

For the sheathing, you can use 120 x 25 mm boards, which are packed across the sheathing bars at intervals of about 400 mm or even more if the roof slope is quite large.

Ondulin flooring

If you know in advance that you will not have an assistant when arranging the roof, then it makes sense to think about purchasing DIY ondulin measuring 2 x 0.76 m with 8 waves, since such sheets are much lighter than standard 10-wave sheets. Along with ondulin, you should also stock up on special nails with snap-on caps.

To ensure the evenness of the edge of the roof, the overhang of the sheet can be limited by bars nailed just below the lowest sheathing board.

Ondulin should be laid from below with an overlap of 1-2 waves. Each next row should overlap the previous one by 20-30 cm. When laying, a checkerboard order should be observed.

To cut ondulin, you can use a regular hacksaw for wood.

Ondulin sheets are fastened at the top and bottom of the sheet using nails with plastic washers driven into each wave.

If in the future you intend to replace the roof, then it is advisable to replace the nails with self-tapping screws, after inserting them into the closing caps.

Upon completion of installation, it is necessary to install the ridge element.

Thus, even one person can cover a roof with ondulin without the help of others.

Do you have any thoughts regarding ondulin and its installation? Please share them by sending us a comment.

We offer you video material where you can get additional information regarding the installation of ondulin on the roof.

Ondulin is a kind of hybrid that combines the properties of slate and roofing felt. Installation of this material is less labor-intensive: its weight is 5 times less than ordinary asbestos slate. Moreover, ondulin can be attached even to an old roof. With the proper skill, covering the roof with ondulin with your own hands will not be difficult.

Laying ondulin

In order for the roof to be able to withstand all operational loads, the installation of this material must be carried out using a certain technology recommended by the manufacturer:

1. With a slight roof slope of 5-10°C, ondulin is laid on a continuous sheathing made of coniferous wood. If the angle of inclination is more than 15°C, it is allowed to manufacture sparse lathing with step 61 cm. The recommended beam cross-section for it is 40x60 mm (you can use 50x50 mm bars).

2. This material needs to be fixed only on a perfectly flat surface. The roof slopes must lie in the same plane and have no kinks. If irregularities or sagging are detected, they should be eliminated.

3. The sheets must be laid perfectly evenly. It is not recommended to compress them too much or, on the contrary, stretch them - this can cause damage to the material. Dismantling already nailed ondulin is difficult, and in case of an error you will have to replace the damaged sheet with a new one.

Advice. To move on the roof it is better to make roof bridges: suspended or attached ladders made of wood or metal with a strong hook with which they hook to the ridge of the roof. In order not to damage the already laid euro slate, you should not step on areas with depressions. It is better to walk in soft shoes, advancing only on him waves.

Roof bridge

4. Cut This fairly soft material can be cut with a regular wood hacksaw or power saw. It is more convenient to make markings with a colored pencil: its traces will be clearly visible on the sheet.

Cutting ondulin

Advice. To prevent the wood hacksaw from becoming clogged with bitumen and getting stuck, it should be lubricated with oil or periodically dipped in water during operation.

5. To avoid thickening in places of overlap and warping of ondulin, it is laid "staggered" (in a checkerboard pattern) so that in the second row the sheets are shifted relative to the first row by 1/2 the width. To do this, the second row starts with half a sheet.

Staggered laying

6. When laying, you should consider direction of prevailing winds(they should blow into the overlap areas as little as possible).

Laying is carried out taking into account the direction of the winds

7. To prevent leaks and snow, ondulin should be mounted with overlap from the sides in two waves. At the ends, the sheets should overlap each other by 30 cm. When laying the Onduline Smart roof, which has special hydraulic locks, the overlap may be smaller.

8. When the roof slope is more than 18°, an overlap of one wave from the sides and 20 cm from the ends is allowed. If the roof has a slope of more than 27°, an overlap of up to 17 cm is allowed. If there is too much snow load, as well as on flat roofs, it is better to increase the size of the overlaps.

Ondulin sheets are laid with overlap

The size of the overlap depends on the slope angle

9. Each sheet of ondulin already has ready-made holes for mounting. For one sheet you will need 20 nails (these fasteners with a decorative head come complete with ondulin). First, they are driven into the corners, then into each wave of the bottom. Next, the sheets are attached through the wave. Nails are not driven into the overlap areas: in this place the ondulin will be fixed after applying the next sheet. It is better not to skimp on nails: this can lead to sheets being torn off by gusts of wind.

Ondulin is fastened with special nails with lockable heads.

10. The nail is only driven in into the upper wave at an angle of 90°C. In order not to damage the soft material, you should not push it into the sheet all the way: the washers should fit tightly, but not push through the sheet.

Mounting order

11. Everyone additional elements(ridges, valley and wind strips) are included in the ondulin kit and are manufactured using the same technology.

12. At the ends of the roof they will be fixed ridge ondulin. Using the same additional element, you can also close joints during transitions on complex roofs. They begin to fasten it from below on the same side from which installation began. The ridge ondulin is laid with an overlap of 12.5 cm. In this case, nails are driven into the ridge in every wave.

Laying ondulin on the roof ridge

13. The ridge, valley, gable are additionally pasted over waterproofing self-adhesive film. It is included in the ondulin kit.

14. Tong (wind bar) It is attached with one edge to the sheets, and the other to the gable boards. For joints on slopes It is allowed to use both ridge and gable extensions.

The ridge, valley and end strips are installed last.

Laying the wind strip

15. Joints in the chimney and ventilation areas must be securely covered with an apron and insulated with silicone sealant.

16. To protect against birds from entering the attic, a cornice filler.

Laying cornice infill

17. This material can be mounted on the old roof. To do this, a new sheathing is prepared, which is pressed onto the previous roofing material.

Installation of ondulin on old coating

Important! Work with ondulin should not be carried out in extreme heat - after all, it begins to melt already at 30°C. To avoid damage, it is not permissible to install this material even at sub-zero temperatures (from -5°C).

Advantages and disadvantages of ondulin

Unlike ordinary asbestos slate, ondulin is flexible and very plastic, so it can be installed in any, even the most inaccessible places on the roof. It can also be easily installed on complex structures with many transitions and bends.

A roof made of this material has high heat and sound insulation. Made from environmentally friendly cellulose, Euroslate is absolutely safe and harmless to human health.

The weight of one sheet is only 6.5 kg. Moreover, its standard dimensions are 2x0.95 m, so ondulin can be easily loaded even into the trunk of a passenger car. For ease of installation, each 10-wave sheet has special markings for fasteners.

Outwardly very attractive, ondulin, unfortunately, is flammable, so its scope is narrowed. It should only be laid on a non-combustible base. Ondulin, made from bitumen, melts too much in the sun. Moreover, under the influence of ultraviolet radiation, this material fades and becomes dull over time. They help combat this deficiency roof fans: Manufacturers strongly recommend installing them on the roof. For the same purposes, you can use special hatches. They are fixed into each wave with the same nails, and the resulting joints are waterproofed.

Onduline fan

Roof hatch (window)

The insufficient rigidity of ondulin also limits the scope of its application: it can only be laid on a hard and even surface, otherwise it may warp and the roof will begin to leak. The warranty for ondulin is 15 years, however, unfortunately, the manufacturer does not guarantee its integrity if at least one of the above installation and operation rules is violated.

Watch a video on how to cover a roof with ondulin with your own hands:

Ondulin is a common roofing material that has a considerable number of worthy qualities. The installation of such a coating has its own characteristics and, nevertheless, a simple technique. Therefore, quite often the roof is covered with ondulin with your own hands.

This roof covering material is made from cellulose fiber, mineral chips and bitumen. Two types of ondulin are used for roofing:

1. Slate. It is used for laying roofs of a fairly simple shape. The material is 3 millimeters thick, 95 centimeters wide and 200 centimeters high. One product weighs no more than 6.5 kilograms. The original ondulin slate has ten waves.
2. Roof tiles. This material consists of small flexible tiles 1 meter long and 35 centimeters wide. Tiles are successfully used for complex roof structures. Unlike slate, bitumen tiles are made from fiberglass. When installing the roof, there is significantly less waste from ondulin tiles.

Several types of ondulin are produced:

• “Smart” – coating with a special hydro-barrier lock;
• "Classic" - material for flat roofs"
• “Compact” - ondulin for small-sized roofs of complex design;
• “DiY” is an easy to install roofing covering with small sheets.

To ensure a strong coating, you should purchase high-quality ondulin. When purchasing material, you need to consider the following points:

• ondulin can have 10 or 8 waves, material with 9 waves is considered fake;
• in a batch, all sheets must be the same size and the same thickness;
• high-quality material is clean - without stains or bitumen residues;
• all sheets of the same color must have the same shade;
• Materials with high technical characteristics are always accompanied by a quality certificate.

You can purchase good material from official dealers of well-known and trusted manufacturers. The price for high-quality ondulin cannot be lower than the market value. A low price for roofing sheets often means a fake.

Calculation of ondulin on the roof

For a simple rectangular roof structure, calculating the consumption of roofing material is easy. To do this, you need to measure its area. The width is multiplied by the length of a given rectangle, and the resulting value is multiplied by the cone of the roof angle.

Having the indicators of the area being treated, it is easy to determine the required number of ondulin. Only the useful area of ​​the sheet is calculated - the parts that are used for overlaps during installation are subtracted from the total value.

To determine the required volume of ondulin for roofs of complex structures, you must:

• the roof structure can be divided into geometric shapes - triangle, rectangle, square or trapezoid;
• according to measurement formulas, calculate the area of ​​each specific figure;
• The angle of inclination relative to the ground of each geometric element is also taken into account.

To obtain the roof area, all identified values ​​should be summed up.

Installation of lathing under ondulin

In order for the laying of ondulin sheets to be strong and reliable, the frame base must be properly prepared. Before installing the sheathing, two layers of waterproofing material are laid and the main parts of the counter-lattice are nailed along the rafter legs. Installation of the base for ondulin is carried out in several stages:

• a wooden eaves strip is installed, the diameter of which must exceed the cross-section of the constituent parts of the sheathing;
• the second board is attached parallel to this plank with an interval of 28 -30 centimeters;
• the following wooden parts of the frame base are mounted according to the step established by the project.

If the roof slope exceeds 20 degrees, then the distance between the sheathing bars should be 60-80 centimeters. In cases where the gap increases, additional wooden slats are installed.

Long screws or nails are used to fasten the boards together. After securing the entire structure of the frame base, you should check its tightness by taking measurements of the diagonals of the slope. In a correctly constructed sheathing, the values ​​should coincide.

After this, wind strips are installed at the ends of the roof slope. Such a board is nailed 3.5 centimeters above the level of the sheathing. Wooden bars for the ridge are installed parallel to the cornice. Each sheathing board should be spaced at the same distance.

Installing the valley strip

To design the valley, an additional solid frame is installed. It is made of plywood or OSB.

When constructing a valley sheathing from boards, it should be taken into account that the material must be more than 20 centimeters wide. The bars are mounted from the valley axis at a distance of 5 centimeters. The procedure for constructing a valley starts from bottom to top. Installation of parts is carried out using special clamps.

Installation of ondulin sheets

At the beginning of the installation of ondulin sheets, it is necessary to determine the location of the roof relative to the wind rose of the given region. It should also be taken into account that laying ondulin is carried out only within the temperature range from 0 to 30 degrees.

Such air temperature indicators significantly reduce the risk of cracks forming in the material and eliminate its stretching under the influence of heat.

Ondulin is fixed using nails with heads matched to the color of the material. 20 pieces of such fasteners are driven into one sheet. Nails are placed at the end of each sheet and in each place where the ondulin parts overlap.

The sheets are laid in a checkerboard pattern. In this case, both transverse and longitudinal overlaps must be performed. It is recommended to start laying the second row of bitumen sheets with half a sheet.

Installing ondulin is similar to laying simple slate. It’s quite easy to lay sheets of such roofing material yourself:

• the first strip of ondulin sheets is laid from the lower right corner;
• when installing the second row, half sheets are used;
• roofing sheets are connected with an overlap - the second one is superimposed on the first;
• ondulin is attached horizontally with self-tapping screws;
• sheets are fastened to the beam in the vertical direction;
• the transverse overlap is made at least 15 centimeters, and the longitudinal overlap is made at least the size of one wave;
• the ridge elements are fixed to the crest of the sheet and also overlapped.

When laying ondulin, it is necessary to take into account that the slope of the slope affects the size of the overlap:

• tilt angle up to 10 degrees - transverse is not less than 20 centimeters, longitudinal is performed at 2 waves;
• from 10 to 15 degrees - the longitudinal overlap covers 1 wave, and the transverse overlap - 16 centimeters;
• slope with an angle of more than 15 degrees - longitudinal is measured by 1 wave, transverse - at least 14 centimeters.

To install the ondulin correctly, you must correctly install the first sheet. It is thoroughly leveled along the cornice and end.

Advantages and disadvantages of ondulin

The main advantage of ondulin is its environmental friendliness. Therefore, its use for residential buildings is quite in demand. In addition, roofing sheets based on cellulose fiber and purified bitumen have a number of other advantages:

1. Plastic. The material bends easily, so it can be given any shape. This property is especially appreciated when installing roofs of complex structures.
2. Moisture resistance. Ondulin manufacturing technology provides maximum waterproofing protection for roofing sheets. For this purpose, special impregnations are used, which, in addition to moisture resistance, contribute to a stronger connection of the material when heated under the sun's rays.
3. Easy to install covering. Installation of ondulin sheets is completely simple, so you can do it yourself.
4. High noise insulation characteristics. Ondulin can be laid on the roof without additional soundproofing protection. Inside a building with such a roof, you will not hear the sound of raindrops or noise from strong gusts of wind.
5. Lightness of the material. The weight of ondulin canvases does not exceed 6.5 kilograms. Therefore, such sheets are easy to transport and install at heights.
6. Ease of processing. This roofing material can be easily cut with a simple wood hacksaw.
7. Aesthetic appearance. Ondulin looks beautiful on the roof. It is produced in four shades - black, green, red and brown.
8. Low cost. The price of the material is significantly lower than metal tiles.

In addition, ondulin does not corrode and does not rot, but still, over time, the surface can acquire a green tint as a result of the formation of fungus and overgrowth with moss.

The disadvantages of using the material include:

• ability to ignite at temperatures above 250 degrees;
• release of an unpleasant odor at high air temperatures;
• fading of the coating when exposed to direct sunlight;
• relatively short service life - from 15 to 20 years.

The average strength of ondulin sheets is also often considered a disadvantage. It can sag under snow loads and when a person walks on the roof. But such a negative property can only be observed if the sheathing is constructed incorrectly and the roofing material is laid in poor quality.

Due to its numerous advantageous characteristics, ondulin is successfully used to cover the roofs of residential buildings and outbuildings. The duration of use of the material, its strength and reliability depend only on the quality of the coating itself and proper installation of the roof.

Coating the roof of a bathhouse with ondulin is one of the most popular solutions. And this is not at all due to the low cost of the roofing, but to the operating features, the loads acting on the roof of the bathhouse and the ongoing processes.

We can safely say that covering a bathhouse with ondulin is more cost-effective than, for example, metal tiles. Why?

When using the bathhouse for its intended purpose, the temperature and humidity in the premises are very high. Steam penetrates through the ceilings and accumulates in the attic. If the roof is not insulated, then condensation settles on the lower part of the roofing and flows onto the wooden rafters and sheathing. Moreover, the lower the air temperature outside, the more moisture settles on surfaces. And moisture, as you know, is the main enemy of any roof.

Let's consider another situation when the bathhouse is periodically used in winter, when there is a layer of snow on the roof. Metal roofing coverings have high thermal conductivity. When the roof warms up, the snow cover begins to melt and then freeze, forming ice. In such conditions, corrosion processes rapidly progress, which leads to the need for maintenance, repair or even replacement of the roofing covering.

Taking into account all of the above situations, we conclude: a bathhouse requires a roofing covering with low thermal conductivity and impervious to moisture. The optimal solution is ondulin, which:

• during the production process, it is impregnated with bitumen on all sides, after which it tolerates operation in high humidity conditions;
• does not collapse due to a few scratches;
• heats up quickly and prevents condensation from appearing on the surface;
• does not make noise when it rains;
• dries quickly;
• It is lightweight, which reduces the load on the foundation.

However, you should not expect that ondulin will last 50 years. This material is not characterized by high strength and wear resistance. Provided that all installation rules are followed, the roof will last 15-20 years, after which it will be necessary to update the coating due to the loss of ondulin’s original shade and, possibly, shape.

Important! Among the disadvantages of ondulin is its high flammability. But this material is not prone to spontaneous combustion, it only supports combustion. This disadvantage can also be considered as an advantage, since if the fire quickly escapes outside, it is possible to save the main part of the building.

Prices for ondulin

Types of ondulin

Ondulin is produced in three versions. The sheets have different sizes and weights, but are produced using the same technology.

Name	Technical specifications	Peculiarities
	195 x 96 cm – dimensions. 3 mm – thickness. 6.3 kg – weight.	The sheets have markings that make it convenient to drive nails into. There is a water barrier lock. There are 10 waves on the sheets.
	195 x 76 cm – dimensions. 3 mm – thickness. 5 kg – weight.	The narrowest eight-wave sheets. When installing narrow sheets, there will be more longitudinal overlaps, and accordingly, the overall rigidity of the roof and its load-bearing capacity will increase.
	100 x 75 cm – dimensions. 2.6 mm – thickness. 2.5 kg – weight.	The best option for baths with a small or complex-shaped roof. The small size of eight-wave sheets reduces the amount of trim and waste.

The waves of all types of ondulin are the same - 9.5 cm pitch and 3.8 cm height. To minimize the amount of waste when arranging the roof, you can combine different sheets.

Rules for installing ondulin

The installation rules are as simple as possible; even those who have never installed roofing before can remember and apply them.

Bitumen sheets are attached either to a solid or sparse sheathing, observing the recommended overlap values. The exact data is presented in the tables below.

Data for roofs with a slope of 5-10 degrees.

The sheathing is built continuous.

Important! In all situations under consideration, the edge of the ondulin sheet on the eaves cannot be further than 35 mm from the edge of the sheathing.

Data for roofs with a slope of 10-15 degrees.

Data for roofs with a slope of more than 15 degrees.

Parameter		DiY	17-27 degrees	More than 27 degrees
Lathing pitch, cm	61	61	26,7	43
End overlap, cm	12	17	20	14
Overlap on the sides, number of waves	1	1	1	1
Cornice overhang, cm	7	7	7	7
Number of nails per 1 sheet, pcs.	20	16	14	13

Important! In regions with a heavy snow load, it is recommended to do more frequent sheathing and increase the overlap of sheets.

For continuous sheathing the following is used:

• FSF plywood;
• edged/unedged board;
• DSP boards;
• OSB-3 boards, etc.

Prices for FSF plywood

FSF plywood

Sparse lathing is made from:

• boards with a thickness of at least 25 mm;
• bars with a thickness of at least 25 mm.

Additional elements (depending on the design of the bathhouse roof) may include:

• valley strips 100 cm long, 50 cm wide;

  

• ridge strips 100 x 50 cm;

  

• sealing tape 250 x 30 cm;

  

  Sealing tape “Onduflesh”

• gable strips 100 x 21 cm;

  

• nails 70 mm long;

  

• covering apron 93 cm long, 1.5 mm thick;

  

• polyethylene foam filler, thickness 19 mm, length 85 cm;

  

• vapor/waterproofing/superdiffusion membrane “Ondutis”.

  

General rules for performing work on installing bitumen sheets.

Rule	Description
	When working on the roof, be sure to use a safety harness and rope. Safety ropes must not be attached to the heads of chimneys or ventilation pipes. To move along the roof, you must use a ladder with a hook and ladders with transverse bars to support your feet.
	Rain, hail, fog, ice, wind with a speed of more than 10 m/s - in such weather conditions it is prohibited to lay sheets.
	Bitumen sheets are laid strictly at air temperatures above -5°C, but not more than +30°C. In hot weather, ondulin becomes too plastic and inconvenient to work with, especially for novice craftsmen.
	It is convenient to mark the sheets with a colored pencil, using a ruler, a strip, a stretched thread or the smooth factory edge of another sheet of ondulin.
	Determine the direction of prevailing winds for your area. Laying sheets must begin from the lower edge of the roof, on the side where there is no wind.
	It is highly not recommended to stretch or compress bitumen sheets by more than 1 cm.
	The second, and then each even row should begin not with a whole sheet, but with a sheet sawn in half lengthwise. Four corners of the sheets should not meet in one place at once, otherwise deformation of the roofing material cannot be avoided.
	● All nails are driven into the upper crest of the wave at right angles to the sheathing. ● The first four nails are driven into the corners of the sheet. ● Nails are driven into each ridge from below and above. ● In the central part, the nails are driven through one wave so that the ondulin does not deform. ● Nails are driven into the overlapping edge wave during installation of the next sheet.

Prices for vapor/waterproofing, superdiffusion membrane “Ondutis”

Calculation of roofing and additional elements for the roof of a bathhouse

Step 1. Calculation of the number of sheets.

First, you need to measure the roof.

Initial data: ridge length 8 m, gable length 16 m, slope length 4 m, total roof area 64 m2.

For the calculation, we take a sheet of ondulin 1 m 95 cm long and 95 cm wide.

The useful area of ​​the sheets depends on the roof slope:

• 5-10 degrees – 1.29 m2;
• 10-15 degrees – 1.54 m2;
• 15 degrees and above – 1.56 m2.

In our case, the useful area of ​​one sheet will be 1.56 m2.

To find out the number of sheets, you need to divide the total roof area by the usable area of ​​one sheet and round up to the whole value.

64 m2: 1.56 m2 = 42 sheets.

Professionals advise purchasing sheets from stocks of 5-10% of the total quantity. So, for a roof with an area of ​​64 square meters, it is recommended to purchase 45 sheets of ondulin.

Step 2. Calculation of the number of ridge strips.

In addition to the bitumen sheets itself, you will need a ridge strip. The useful length of one plank is 85 cm.

Accordingly, we divide the length of the roof ridge by the useful length of the strip and get the required amount.

8 m: 0.85 m = 10 planks.

Step 3. Calculation of the number of gable strips.

We use the formula that was used to calculate the number of ridge strips.

The useful length of the gable strip is 95 cm.

16 m: 0.95 m = 17 tongs.

Plus one spare tong, for a total of 18 pieces.

Step 4. Calculation of the number of nails.

One sheet of ondulin must be secured with twenty nails. Multiply the number of sheets by the number of nails.

45 x 20 = 900 pieces.

You will also need nails to secure additional elements, so you should take them with a reserve so as not to interrupt your work due to suddenly running out of hardware.

We cover the roof with our own hands. Instructions

Stage 1. Mount the sheathing under the ondulin. Consider the slope of the roof to accurately determine the distance between the boards.

Before you begin laying the covering, you need to nail bars under the gable and ridge strips to make the structure more rigid.

Secure the bars at a distance of up to ten centimeters from the center of the ridge bar. This distance is selected depending on how steep or gentle the slopes are. It is best to try the skate on the roof in advance.

Stage 2. Attach a special apron strip that bends at different angles to the cornice. Due to its design, the element can be fixed at any distance from the edge of the cornice.

Attach the elements with a five-centimeter overlap.

Stage 3. Install the wind board 3 cm above the level of the sheathing.

Prepare the roof covering for installation. Trim if necessary. Install the first sheet of covering so that its long edge meets the wind board. If a drip line was previously installed, install the sheet flush with the edge of the roof.

If a drip is not provided, the sheet should hang over the edge of the roof by no more than five centimeters.

Stage 4. To protect the under-roof space from birds, insects and debris, use eaves infill. To ensure ventilation of the under-roof space, make holes in the filler by squeezing out the material with a suitable tool.

Stage 5. Begin the fastening process.

The new nails have a strong, monolithic head. The shade of the cap matches the color of the roofing material. Drive the nails in with a hammer, placing them perpendicular to the covering and sheathing boards.

Stage 6. If it is necessary to install gable elements, then fix the wind board tightly to the ondulin, and the upper edge of the board should be 35 mm higher than the surface of the sheathing.

The forceps are mounted from bottom to top. The overlap of the tongs on each other is 12-15 cm.

Drive nails in from above and from the sides in increments of 31 cm, and pay special attention to fixation in places where there is overlap.

Stage 7. Attach the skate. The planks are fastened taking into account the direction of the winds. Determine which direction it blows most often and mount the skate on the other side.

Take the sealant (cornice filler), clear the holes and insert it under the strip.

Nail the ridge along each underlying wave of ondulin, each side in turn.

Install the following ridge strips with an overlap of 15 cm and so that the water barriers coincide.

Video - Analysis of possible errors

Internal junction of slopes

It is designed using a valley strip.

Stage 1. Secure boards or beams that will provide additional support for the plank. The plank itself will be attached to these boards.

Stage 2. Take a sheet of roofing and fix it on the lower slope. Trim it if necessary.

Do not forget about the order when hammering in fasteners.

Stage 3. Apply Ondutis BL sealing tape to the overlap areas of the valley elements for better roof tightness.

Stage 4. Nail the valley strip. Drive a nail into each ridge of the covering underneath.

Stage 5. Secure the seal.

Start attaching the sheets on top of the plank. The bottom edge should not be further than seven centimeters from the fixation point. Along the bottom edge, drive fasteners into each ridge.

Let's consider an example on a roof with a slope angle of more than 15 degrees.

In this case, a sparse sheathing of boards is installed under the ondulin with a pitch of 61 cm.

Stage 1. Attach additional boards to the lower slope. Nail them in such a way that they support the fasteners of the tongs.

Stage 2. Take the sheet and install it on the lower slope of the sloping roof. Drive in the hardware from below, then from above, and then in the center in a checkerboard pattern through one wave.

Stage 3. Attach a sealant to the top edge of the secured sheet. Lay gable strips on top with an overlap of 15 cm.

At the bottom, fix the bar with nails into each wave of the underlying ondulin.

Important! The bottom edge of the sheet should not hang more than 7 cm from the fastening point.

Valley strip: installation

Endova is a roofing element located at the junction of two slopes (internal corner).

Stage 1. There should be a continuous base along the axis of the valley. The width of the lathing is at least 25 cm from the central axis of the plank.

Stage 2. Place elements from bottom to top. Attach the first plank with the lower edge extended by 5-7 cm; in the future, it is not difficult to trim off the excess.

On a note! To align the valley strip relative to the axis as accurately as possible, secure it with a construction stapler on four sides. Drive the staples closer to the edges.

Lay and staple the remaining elements in the same way with an overlap of 15 cm.

Stage 3. Cut the ondulin sheets extending onto the valley strip at a distance of 5-6 cm from the valley axis.

Attach the sheets on both sides of the valley. Drive fasteners into each wave at a distance of 3-5 cm from the edges of the plank.

Horizontal junction of roof and wall: sealing

Relevant for bathhouses with adjacent verandas or terraces, as well as bathhouses attached to the house.

To design the junction, a covering apron and Onduflesh Super tape are used.

Stage 1. Nail an additional board or timber onto the roof sheathing next to the wall to ensure greater structural strength.

Stage 2. Install the roof covering.

Stage 3. Lay the covering aprons overlapping in one wave. One side of the additional elements should be adjacent to the wall, the other should lie on bitumen sheets.

Fix the lower part of the elements with nails in each wave. Additionally, secure the upper part of the apron with self-tapping screws if the connection is not tight.

Stage 4. Cut a 15 cm wide strip from the Onduflesh Super tape. Apply the tape over the apron, extending onto the wall.

Stage 5. Secure the top of the sealing tape with a metal strip and screw self-tapping screws into the holes.

Connecting a sloping roof to a wall: sealing

Relevant for bathhouses with a porch with a gable roof.

Stage 1. Nail a board or bars close to the wall onto the sheathing.

Stage 2. Secure the roofing material.

Stage 3. At the junction of the wall and the covering, stick “Onduband” or “Onduflesh Super” to seal the joint.

Stage 4. Screw a metal strip to the top edge of the tape.

Secure the lower edge of the tape with roofing nails.

Chimney pipe passage: installation of additional elements

Almost every bathhouse has a chimney. The only exceptions are saunas with electric heaters. The place where the chimney pipe passes through the roof must be properly designed to prevent leaks.

Stage 1. Start by finishing the front wall of the pipe. Try on the covering apron - it should be adjacent to the pipe so that there is 1 wave to the right and left of the walls).

Trim off the excess with a mounting knife.

Place the apron in place and secure it with nails, and do not drive them into the outer waves.

Seal the corners of the apron with pieces of Onduflesh Super tape.

Stage 2. Attach the apron strip to the side walls of the pipe (side connection).

Trim off the excess. Nail the apron to the additional sheathing bars installed in advance.

Stage 3. Apply sealing tape to the back wall of the pipe, as well as over the aprons. A 15 cm wide tape is enough for this.

Secure the sealing tape and apron with metal slats.

Apply polyurethane sealant between the top edge of the splashback and the wall.

Stage 4. Attach an additional sheet of ondulin to the back wall of the chimney.

Bathhouse roof repair. Step-by-step instruction

Let's consider the option of updating the roof of the bathhouse without dismantling the old covering, which in this case is represented by galvanized corrugated sheeting.

With the help of ondulin, you can eliminate all the shortcomings of the old roof:

• poor-quality joints leading to leaks;
• increased wear of material with high thermal conductivity.

Stage 1. Take measurements and prepare boards with a thickness of at least 25 mm for installation of the sheathing and counter-lattice.

Nail the boards over the old roofing, placing them parallel to the ridges of the corrugated sheeting.

Perpendicular to the fixed boards, nail the sheathing under the ondulin. The recommended sheathing spacing can be found in the tables above.

Stage 2. Begin laying and fixing the ondulin sheets. Due to the light weight of the sheets, increased load on the supporting structures of the structure and foundation is eliminated.

Stage 3. Fix the additional elements.

Roof repairs are carried out in the shortest possible time and at minimal cost.

Video - Slate roof upgrade option

Useful life hacks from professionals

Tip 1. You can cut ondulin crosswise using a regular hacksaw. To prevent the cutting edge from becoming clogged with bitumen, periodically moisten it with water. You can also use silicone grease or oil.

But it’s most convenient to use a jigsaw. And to clean the knife, just saw any unnecessary piece of wood.

You can cut the bitumen sheet along the wave with an ordinary construction knife.

Tip 2. The nails need to be driven in, slightly recessing the head into the coating. But at the same time, it is important to calculate the effort so as not to break the sheet with a hammer when trying to hammer the hardware as deep as possible.

Video - How to hammer nails correctly

Tip 3. Dismantling an already nailed sheet without damaging it is not only problematic, but in most cases impossible. This is always worth remembering. Make sure that the sheet lies perfectly flat, only then begin fixing. It is for this purpose that a guide thread is pulled along the lower edge of the sheathing.

Tip 4. If it becomes necessary to walk with your feet on the roofing, then never step between the waves. Place your feet exclusively on the upper ridges.

Tip 5. Do not under any circumstances throw away the installation instructions that will be included with the roofing material delivered to the site. Firstly, these instructions indicate all the necessary distances, overlaps and overhangs. And secondly, this instruction is a warranty card for the materials.

Tip 6. Take care of your ondulin roof to extend its service life by several years. Check the condition of your roof twice a year. The best time for this is October and May.

Make sure that the branches of shrubs and trees located near the bathhouse do not come into contact with the roof. If necessary, trim them in a timely manner with pruning shears, otherwise roof repairs cannot be avoided.

Clean ondulin with a broom at least twice a year. In the spring, you need to remove the garbage that has accumulated over the long winter, and in the fall, you need to remove all the fallen leaves. All the debris that remains on the roof will definitely begin to rot. The roofing itself is unlikely to be quickly destroyed by this, but its service life will definitely be reduced.

Don't forget to clean your gutters.

On a note! It is much more convenient to clean up immediately after the rain.