Minimum roof slope for metal tiles. What should be the roof slope angle for metal tiles? Gable roof and its slope for metal tiles

Our huge country is located in different climatic zones. If in the Far North and Far East strong wind and snow, then in the south of Russia there may be rain and wind. You need a very responsible approach to choosing roofing material and calculating the slope of the roof of your house. The most practical choice is metal tiles because they are inexpensive, durable and beautiful. But the angle of the roof depends on the expected wind load and precipitation typical for your region. So what should be the minimum pitch angles for your metal roof? This question needs to be answered.

In this article

Properties of roofing material

IN modern construction A wide variety of roofing coverings are used, but metal tiles are deservedly considered one of the most popular materials. In many countries, materials such as tiles have long been produced. Therefore, the use of metal not only reduces the cost final cost products, but also serves as a harmonious continuation of ancient traditions. To the high technical specifications metal tiles include:

• the use of galvanized sheet metal and its coating with durable polymer paints to impart anti-corrosion properties;
• wide choice of color architectural solutions;
• manufacturability and ease of installation of the roof, which does not require any special tools and devices;
• the lightness of the material, allowing it to be installed at high altitudes and in complex rafter structures;
• no heavy load on the rafters due to light weight leaf;
• at relatively thin sheet, it can withstand quite heavy loads, since it has stiffening ribs.

All of the listed properties allow the use of this coating in difficult climatic conditions. To calculate the amount of material, you need to know the minimum angle of inclination of a metal roof.

How to determine the roof pitch in your area

To calculate strength roofing structure and quantities required material you need to know the optimal roof slope. It is necessary to take into account a number of circumstances, including:

1. designed number of slopes;
2. used under-roof space;
3. Efficiency indicators;
4. weight of the structure.

It would seem that the steeper the slope, the better, but this leads to increased material consumption and increased weight, as well as to a large wind load on the structure. That's why there is such a thing as optimal angle slope of metal roofing.

A slight slope, about 10-12 degrees, has its drawbacks, which require increasing the row of sheathing and strengthening the rafters, due to the increased snow load. In addition, care should be taken to improve waterproofing and the need to increase the overlap of sheets. This is done in order to prevent leaks at joints with gentle slopes. Roofs of this design the best way suitable for southern regions where the snow cover is not heavy and the average annual temperature is not too low. IN summer period flat roofs warm up less, which creates a comfortable conditions for existence.

Steep slopes, ranging from 30 to 45 degrees, are more suitable for regions with more low temperatures and frequent snowfalls, but it is necessary to take into account the increasing wind load on the roof and the building as a whole. It is also important to take into account the strength characteristics of metal tiles, which are laid down by the manufacturer of the material. In the case of steep slopes, it is necessary to fasten the sheets more often than usual, because they are prone to sliding under the influence of gravity. The greater the angle of inclination of the roof, the more labor-intensive and less economical it will be to install.

There are two loads on roofing material, which in terms of technical support strengths oppose each other.

The steeper the roof slopes are constructed, the greater the angle of inclination, the easier it is for precipitation to mix on them without lingering on the surfaces of the slopes. But at the same time, the roof area increases and threatens to increase wind loads. Therefore, it is worth choosing based on two parameters best option, taking into account the factor of increasing the cost of the structure due to increasing the size of the roof structure.

What is the optimal angle of roof inclination recommended by the manufacturers of this building material? After the tests, companies producing metal tiles recommend using it when the slope is inclined from 11 to 45 degrees. In this case, the most acceptable angle of inclination is from 12 to 22 degrees. Building codes and regulations do not give clearly defined recommendations on this matter, but the preferred one, with a slope length of about 6 meters, is an inclination angle of 14 degrees. We have come to the choice of the most economical way roof covering, which is defined by such a concept as minimum slope metal roofing.

What is the minimum slope and how to determine it

Depending on the climate zone, architectural solution and aesthetic preferences of the home owners, the following types of roofs are erected:

• multi-gable roof with a complex and slender structure;
• vaulted roof as an element of national culture in architecture;
• hip roof, complex hipped structure;
• hip roof, combination of isosceles triangles;
• gable roof, widespread and time-tested;
• the roof is pitched, used mainly for technical and utility rooms or as an element of a more complex structure.

Multi-tongs and vaulted roofs are not suitable for the use of metal tiles, which are used only in the elements of these structures. Whereas hip roofs are quite widely used in middle lane and are characterized by a choice of minimum tilt angles ranging from 22 to 45 degrees. Hip roofing is used as decorative element, and the angle of inclination of isosceles triangles is directly dependent on the area covered by the tent. This structural element very economical to manufacture, and the angle of inclination ranges from 35 to 45 degrees.

One of the most popular roofs is gable. The manufacturer recommends maintaining minimum roof slope angles ranging from 12 to 14 degrees. Given the harsh climate, it can be recommended to expand these limits from 14 to 22 degrees of slope. It is with these characteristics that the roof resists possible strong winds well, and also represents an almost monolithic structure that prevents moisture from penetrating into the under-roof space of the building.

For pitched roofs minimum tilt angles range from 11 to 14 degrees, since large tilt angles create a danger of the roof falling off in multidirectional gusts of wind. In the climatic conditions of Russia you need to adhere to minimum inclination slopes from 14 to 22 degrees. When building in flat or mountainous areas, it is necessary to take into account the landscape and wind rose, depending on the time of year.

When choosing the type of roof, each person’s taste preferences play a decisive role. Everyone wants to build a house so that it is beautiful, comfortable and serves long years. The roof crowns the building and it Special attention because it not only decorates, but also protects from the effects of an aggressive environment. In order for it to serve for many years, you need to design it correctly and build it correctly. And to save money, you need to choose the correct slope of this roof for metal tiles, taking into account climatic conditions your region.

The process of selecting the right roof slope is one of the main activities. On the one hand, it has an aesthetic significance, and on the other, a practical one. This characteristic affects the general operational parameters, service life, amount of materials used. The minimum angle of inclination of a metal tile roof has some features that impose their own limitations. We will talk about them further.

Features of roofing material

The fact that metal tiles are so popular among the population in private construction can be explained by its positive aspects:

1. Light weight. Possibility of constructing complex geometric shapes. No need to further strengthen rafter system. There is no high load on the walls and foundation of the house.
2. The installation technology is no different in complexity. Available even without special skills. No specialized equipment required.
3. Big choice color range. Can be matched to any home exterior.
4. The slope of the roof can withstand heavy loads due to the profiled waves.
5. Metal sheets are protected against corrosion by an external polymer coating.

Modern roofing coverings must have high functional and decorative characteristics, as they must provide a high level of protection and look attractive.

Metal tiles have gained popularity due to their long service life, operational properties and not high price. However, it has its own characteristics and limitations on use.

During design, it is necessary to clearly understand what minimum roof angle is acceptable. The following will depend on it:

• Possibility of coating with one or another material;
• Design of the entire rafter system;
• Level of snow and wind load;
• Sediment removal efficiency.

Metal roofing can have a very slight slope. This is ensured by the rigidity of the sheets. Another advantage will be the possibility of unhindered removal of sediment due to minimal surface roughness.

What influences the choice?

The angle of inclination of a metal tile roof does not have standardized values. The minimum indicators will be influenced by many parameters that need to be taken into account during the project development stage.

Wind loads. Calculated based on the total roof area, medium strength winds in the construction region. All information on the region can be found in directories or the Internet.

Snow loads. In winter, snow collects on the surface and then slides off under its own weight. If the level is small, then the snow will have to be removed manually to eliminate the possibility of damage to the rafter system under its weight. With more steep slopes The snow is removed faster on its own. Average level Snowfall in the region can also be found on the Internet or in relevant reference books. The project must be developed with safety margins in order to avoid possible deformations in the event of heavy snowfall.

The angle of inclination of a pitched roof made of corrugated sheets also depends on the type of heating, thermal insulation of the entire structure and the under-roof space. If the level of thermal insulation is insufficient, significant heat loss is observed. This may cause snow to melt and accumulate more slowly. The water will flow down. By performing thermal insulation measures, heat loss is reduced. As a result, snow will accumulate more actively. When calculating the slope without thermal insulation materials, there is a chance that the coating will not withstand increased snow pressure.

The amount of rainfall should also be taken into account. The optimal level will be no less than 22°. With a smaller slope, you will have to lay metal tiles using sealants. It will prevent liquid from penetrating through the joints.

In addition, it is necessary to take into account the shape of the structure. So, for single-slope ones, 20-30° will be ideal, for double-sloped ones - 20-45°.

Minimum slope values

In accordance with the requirements of SNiP, for rafters longer than 6 meters, the minimum angle of a corrugated roof is 14°. It is based on calculations of the average parameters of coating strength and load resistance. Despite this, during project development it is worth paying attention to the manufacturers’ recommendations.

In most cases, manufacturers indicate that the roof angle for metal tiles should be designed at 12°. Some manufacturers have options suitable for slopes of 11°. A decrease in parameters is associated with an improvement in individual technical parameters material – increased rigidity and a smoother surface.

It should be noted that metal tiles can be built in certain areas that do not receive heavy rainfall. A slight slope provides stability, but seriously increases the snow load, because... the snow doesn't slide down.

Roofs for houses made of metal tiles with minimal parameters allow you to reduce the consumption of materials during the construction process. Such roofs are preferable in southern regions, in which the amount of precipitation does not exceed the norm.

Optimal values

The surface area directly depends on the slope. Steeper structures are not able to retain sediment on the surface, which is quickly removed downwards. However, tall ones have greater windage. In addition, more is spent. From this we can conclude that the higher the roof and steeper the slope, the more expensive it will be.

It must be taken into account that the increased windage of a roof with high ridges does not allow the construction of such structures in regions with strong winds. They are not able to withstand such influences constantly.

The slope, including the angle of inclination of a pitched roof made of corrugated sheets, affects the resistance to loads. To increase the strength of a structure with small slopes, it will be necessary to create more frequent sheathing. It will strengthen the entire rafter system, as well as overall reliability.

Even taking into account the absence of restrictions on the use of metal tiles for steep structures, it is still not very suitable for such structures. At more than 45°, the sheets are capable of sliding down under their own weight. This can be eliminated by installing additional fixation points.

Based on many years of construction experience and recommendations from manufacturers, we can say that the most optimal slope of a roof covered with metal tiles will be 22°. Precipitation does not linger on it. Economical to build. Durable and reliable, able to withstand severe wind loads.

How to calculate?

i = H / (1/2L)

i – slope that is calculated

H – size from ceiling to ridge

L – width of the house

The result can be converted into a percentage by multiplying by 100.

The most common values ​​are in degrees. They are calculated based on trigonometric function arctg. There is nothing complicated, since there are tables for translation.

It is possible to use a similar calculation for two and single-pitched roofs. In case of single slope option the total span length will be taken into account. If there are unequal slopes, then the distance from the ridge to the ceiling is applied. The angle of inclination should be determined separately from the slopes.

For roofs with complex structures and differences, use correction factors slopes relating to horizontal projections.

Positive and negative sides

When deciding, you need to take into account other factors that may have an impact. They can be positive and negative.

First, let's look at the positive criteria that influence construction.

1. Possibility of arrangement of living quarters (attics) of large areas;
2. At buildings with large values The possibility of water penetration into joints and connecting elements is eliminated. This helps to increase service life;
3. In areas with significant snow precipitation on roofs over 45°, they may not be taken into account. You can save on installing snow guards.
4. By correctly designing the ramp, you can do without the use of special fasteners.

Let's consider the negative points:

1. Increasing the slope leads to increased material consumption;
2. The weight of the roof also increases with increasing level of the slope. This is a direct increase in the load on the rafter system. Strengthening will be required;
3. At sharp angles and significant heights, the windage increases. Strengthening is also needed.
4. The drainage process becomes more complex. A drainage system with greater throughput. Sometimes this is problematic.

The process of calculating the optimal slope consists of finding compromise solutions that will take into account all the features of the construction of the structure and appearance.

Metal tiles allow you to quickly and easily create a reliable roof covering. To do this you need to select quality material, know the installation technology depending on the angle of the roof. This indicator largely determines the quality of installation.

The angle of inclination of a metal tile roof and its features

The angle created by the floor plane and the roof slope is called the roof slope angle. This indicator can be expressed as a percentage or degrees, which is more relevant than percentage. The calculation is made by dividing the height of the ridge by half the width of the building. The angle of inclination is regulated by SNiP rules, manufacturers roofing coverings and depends on operational, technical properties materials, as well as the conditions in which the constructed roof will be located.

This indicator is important for calculating the parameters of the roof and its elements. The following factors also depend on the angle of inclination:

• the possibility of using any roofing material;
• parameters, design and materials of rafter system elements;
• effective removal of sediments and prevention of their accumulation;
• cost of roof and covering installation;
• roof weight and quantity necessary materials to create it.

During the design process, all issues related to the angle of inclination, area and other indicators are resolved. Changing these data during construction will lead to disruption of the entire process, namely: increasing or decreasing the roof area, the need to change the cross-section of the rafters and other actions. For example, if the slope of a roof covered with metal tiles was changed from 22 to 45°, then the area of ​​each slope will increase by 20%. As a result of this you will need Additional materials, installation work, calculations.

Calculation of the angle of inclination

Knowing the length and height of the ridge run from the cornice is necessary for self-calculation corner. In this case, the laying represents the distance of the lower horizontal zone of the slope from the corner area to the projection of the upper point of the roof on the eaves. The slope is indicated by the symbol i and is calculated in percentage or degrees using the formula i = H/L. In this case, H is the height of the roof, and L is the length of the roof. To convert the result into a percentage, you need to multiply it by 100. At the end of the calculations, select the appropriate material that can be used with the existing slope of the slopes.

The pitch angle of the roof depends on the ratio of the height of the ridge and the width of the span

Video: features of finding the roof corner

Minimum inclination angle

For high-quality installation and maximum use of the properties of metal tiles, you need to take into account what exists minimum indicator angle of inclination allowing the use of this material. The smallest acceptable parameter is 12°, and if the angle is smaller, then metal tiles are not suitable for roofing. This is true for both hip and half-hip structures.

High-quality metal roofing is possible if you take into account important indicators designs

The minimum slope angle is often used in regions with strong winds but little snow load. This is due to the fact that a slope of 12° does not make the roof a special obstacle to the wind and gusts pass freely over the structure. If the region is characterized by heavy precipitation in the form of snow, then more steep roof for the building.

Established standards SNiP and GOST regulate the design of many structures and structures. This also applies to roofs covered with metal tiles, namely, there is a recommended value for the angle of inclination of the slopes. The permissible average angle for pitched roofs is from 20 to 30°, which makes metal tile roofing as functional and practical as possible. Gable structures can be constructed at an angle of 20–45°.

Depending on the angle of inclination, the type of roof is determined

The recommended parameter can be specified by the manufacturer of the roofing material. Often this indicator is used when using metal tiles, but this approach is quite objective and non-individual. Following the manufacturer's recommendations will allow you to get the maximum benefit from the characteristics of metal tiles, for example, improve rainfall or prevent sheet breakage, but the climate of the region plays an important role.

Video: how to measure the angle of the slope

Determining the optimal angle

Roofs can be different in shape and size, so their parameters are always calculated individually. Determining the angle of inclination depending on the type of roof covering allows you to independently find out its value and create reliable design, which is resistant to wind and snow loads.

Broken and complex roofs require professional calculation of the slope angle

If the roof has a broken shape or many slopes with fractures, then the calculation of the parameters should be carried out professionally. Often all slopes do not differ from each other by more than 20°. This takes into account existing norms and standards, required design dimensions, climatic factors and other features.

The optimal angle for a roof covered with metal tiles is 22°. This indicator was identified by professional craftsmen as a result of many years of experience working with similar designs and studying the properties of metal tiles.

Slope of a hipped roof made of metal tiles

A roof with 4 inclined surfaces is called hip or hip. Each slope must have a certain angle of inclination, but the design has symmetrical sides. The end parts are sometimes shortened, in which case the roof will be called half-hip. To calculate it, the same rules are used as for a full-fledged hipped roof.

A hip roof is easy to construct, but requires careful calculation of parameters

An accurate calculation of the angle can be carried out by a professional, and if it is not possible to get such help, then it is worth considering optimal parameters depending on climatic conditions:

• a minimum value of 12° is used for strong wind loads but light precipitation;
• if the region experiences snowy winters, then you can choose an angle of 55–75°;
• for climates combining strong winds and heavy rainfall, an average inclination angle of 30–50° is convenient.

This approach is easy to implement if you know the weather conditions in your region of residence. Relevant data can be found in available information sources and websites of meteorological centers.

The angle of inclination is determined separately for triangular and trapezoidal slopes

Gable roof and its slope for metal tiles

When determining the level of slopes for a roof with two inclined surfaces, the same principles apply as in the basic calculation hip design. These are climatic factors and the material of the external coating.

A simple gable roof has symmetrical sides

The optimal indicator for a gable structure is an angle of 20–45°. This slope does not make the roof an obstacle to the wind and ensures rapid drainage of snow and water. If you need to create a spacious attic, then this value is increased. In this case, the amount of roofing material increases.

When installing low-slope roofs made of metal tiles, experts recommend the following actions:

• increasing the frequency of sheathing slats and reducing the pitch between the main rafters, which allows minimizing the risk of collapse or damage to the roof under snow load;
• when installing metal tile sheets, horizontal overlaps are 8 cm, and vertical overlaps are 15 cm;
• thorough insulation of joints with silicone sealants intended for roofing work.

If the roof consists of slopes various forms, then for each of them the angle is calculated individually

An angle of 45° is optimal for rapid removal of water and snow cover. There is another feature here - heavy weight roof covering, which can cause it to become deformed or slide off the slope. The only solution in this case will be additional fixation of each covering element to a durable sheathing.

Asymmetrical metal roofing

Original and simple solution for construction beautiful home is an asymmetrical roof with slopes of different lengths. They represent two surfaces with different angles of inclination. Therefore, it is especially important to select for each side a parameter that will ensure the design’s reliability, practicality in operation and resistance to climatic conditions.

The indicator of each slope is determined individually

When calculating such a roof, it should be taken into account that the surface with a large slope should be located on the side of the prevailing winds. This will ensure rapid precipitation, but the slope should not be too steep, as in such a case it will become an obstacle to the wind and can be damaged by strong gusts. In this case, the angles of the surfaces should not differ by more than 25–30°.

Asymmetrical roofing allows you to create a canopy for the veranda

In the process of constructing an asymmetrical roof, it is important to take into account that the center of gravity is not in the middle of the building, as is the case with a gable or other classic roofing. Therefore, a reinforced rafter system is created, and the angle of the roof should not be more than 45°. If the slope is greater than this indicator, then the windage of the structure increases, which leads to its damage.

Determining the angle of the roof slope - important process, on which the effectiveness of metal tiles as a roofing depends. Taking into account climatic factors, building parameters, and the required usable volume of the attic will allow you to find out the optimal location of the slopes and make them as easy as possible to use.

When building any house, great attention must be paid to the roof. In this case, it is important not only to choose the right roofing material, but also to calculate the angle of inclination. The strength and reliability of the structure will depend on this value. Calculating the angle of inclination is not as simple as it might seem, since it is necessary to take into account many different factors, features of the roofing material, roof structure, and climatic region.

The slope angle is calculated separately for each part of a multi-level roof.

What affects the slope angle?

When using metal tiles, it must be remembered that such values ​​are greatly influenced by certain parameters. It is important to consider the following values:

1. Single-pitch, double-pitch or complex roof planned for construction. Not only the angle of inclination will differ here, but also the material consumption and flooring technology steel sheet.
2. Thickness and type of metal tile sheet (there may be different overlaps when laying, metal consumption).
3. Climatic region (snow and wind loads, the use of sheets with a certain thickness, etc. are taken into account).
4. Purpose of the building (residential building, garage, outbuildings, baths). also in in this case we must remember that the presence or absence attic space, attics, has a special impact on the type, appearance, roof height.
5. The general design of the building and the appearance of the facade (the roof must fully comply overall project home, complementing it, and not standing out, creating disharmony).

Features of metal roofing

One of the most popular materials for roofing is metal tiles. This is a thin steel sheet that has a profile made in the form of a tile, exactly repeating its pattern. This sheet has numerous advantages: it is durable, lightweight, that is, it does not place heavy loads on the rafter system. Its installation is not so complicated.

When determining what the angle of inclination will be for a roof made of a similar material, it is necessary to take into account all the features of the steel sheet. In this case, it must be remembered that metal tiles require a minimum angle to ensure the roofing material’s resistance to wind and snow loads. It is necessary to ensure that the so-called swelling of the roof does not occur, which causes increased loads on the rafter system, and this can lead to destruction.

The optimal value for metal tiles is the angle of inclination, which averages 22 degrees.

Installation of metal tiles is carried out at minimum value The roof angle is 14 degrees, the optimal is 22 degrees.

It is at this value that protection is provided against moisture accumulation on the surface of the roofing covering. With this value, the maximum possible protection the entire roof structure from melt and rain water. The minimum possible tilt angle should be 14 degrees. But this limitation applies only to metal tiles; for other roofing options, for example, flexible tiles, this value may be less (from 11 degrees).

It must be remembered that the angle of inclination also affects installation methods. At low angles, additional waterproofing from silicone sealant to prevent moisture from getting under the coating at the fastening points and joints of individual sheets. The overlap is also different, that is, when the angle of inclination changes, the consumption of metal tiles also changes.

Formula for calculating roof slope

To correctly calculate the angle of inclination for the roof of a house, you need to use the simplest mathematical formulas. This will require data such as the height of the roof ridge of the house, the length of the span, and the length of the rafters. Calculation of the roof angle depends on the exact height to which the ridge needs to be raised. But a lot depends on what exactly the under-roof space will be like.

There aren't many options. This residential attic, attic used or unused room, ventilated space, in cases with flat roofs, this angle is calculated based on the fact that water can leave the surface without accumulating (usually a fixed angle of three degrees is used).

The angle of the roof depends on the width of the house and the height of the attic.

During construction full attic will be calculated like this:

1. If the gable width is, for example, six meters, it is necessary to divide this value in half, obtaining a value of 3 meters.
2. Let's assume that the roof height is 1.8 meters. This is the standard value that is used in most cases.
3. Now using mathematical formula, we get: sin A = a/b = 3/1.8 = 1.67. Using the Bradis table, we find that the sine of angle A, equal to 1.67, is 58-59 degrees. In this case, it will be more convenient to round; in the end we get what is equal to 60 degrees.

This method of calculation is considered optimal, but it is necessary to take into account other factors, such as weather conditions, climate zone, expected loads and roofing material. Metal, flexible, natural tiles, roofing iron and other materials can have a certain influence on the choice of angle.

Positive and negative factors

When calculating from metal tiles, you should not forget about two groups of factors that can be not only positive, but also negative. Let's first consider a positive group of criteria that can influence the construction of a roof:

1. Construction of residential under-roof spaces and attics, characterized by a large area;
2. Rain and other precipitation hitting the roof surface at a large angle. In this case, the possibility of water getting between the roof elements is practically excluded, which extends the service life of the rafter system and metal tiles;
3. If the planned snow loads are strong, it must be taken into account that with a large slope, for example, from 45 degrees, they can be ignored. In this case, you can not use snow guards, which allows you to save on materials;
4. If correct, you can use ordinary standard fasteners for fastening, that is simple self-tapping screws and nails.

Among the negative factors, the following should be noted:

1. Changing the slope of a metal tile roof can increase the consumption of materials. So, when the angle increases from 15 degrees to 45, the flow rate will increase by about 20%.
2. The weight of the roof also becomes greater when the angle changes, and this leads to an increase in the load on the rafter system. And this additional expenses to strengthen the structure.
3. For sharp corners and high roofs, the windage increases greatly, that is, one should not forget about strong wind loads. This requires strengthening the entire structure.
4. The drainage system becomes more complicated, since for a larger area of ​​the roofing surface it is necessary to organize drainage system with higher throughput. This is often very difficult to do; installation of roof drains in several tiers is required, which greatly increases the cost of the entire system and work.

When calculating the angle of inclination for any roof, not only from metal tiles, but also other materials, it is necessary to pay attention to the most various factors, which are not limited only to the external attractiveness of the design. It must be taken into account that wind loads can be dangerous for tall structures, and snow loads for low ones.

Roof design is no less important stage construction of housing than installing a foundation or erecting walls. After all, the comfort of living in the house largely depends on what the future roof will be like. This is due to the fact that they are placed on the roof protective functions, that is, this element must protect the premises from snowfall, rain, winds and other unfavorable weather conditions. In addition, a correctly selected roofing option will give the building a complete and aesthetically stunning appearance. When deciding what the roof should be like, it is worth considering the covering option, the type of slopes and their angle of inclination. The most popular and affordable protective and decorative roofing material Sheet tiles made of metal are considered today. This product is distinguished by a wide variety of designs, affordable cost, ease of installation, and most importantly, high strength and reliability. It is generally accepted that the minimum slope of a metal tile roof is 11-14 degrees. Let's look at it in detail this question to understand why exactly this value should be, and what the roof slope generally affects.

What determines the angle of inclination of the slopes?

Quite a lot depends on the angle of the roof. In particular, it is this parameter that allows you to install a reliable and functional roof. However, certain factors also influence what the angle of the slopes should be. For example, it is worth considering the following points:

• roof structure;
• climatic conditions in the region;
• building form;
• materials used.

In many ways, the slope of a metal roof depends on the type of roof. The most popular are four types of roofing systems.

1. Shed - the structure is one plane, which is located on walls of different or equal heights. Most often used for commercial buildings, the slope of such a roof varies between 5-25 degrees.
2. Gable - in this case, the roof has two slopes connected in the center by a ridge beam. That is, one side of each roof plane rests on the ridge, and the other is located on the corresponding wall of the building.
3. Hip and half-hip - similar in configuration to gable roof, but at the same time they have large quantity stingrays The angle of inclination can vary over a fairly wide range, and it is not necessary that each slope will have the same slope. As a rule, such roofs have four slopes, two of which triangular shape, and two are trapezoidal. We recommend that you read: .
4. Hip roof - this type of roof, most often, also consists of 4 slopes, but all planes have the same shape isosceles triangle. The peculiarity of this roof is that the slopes converge at one central point, that is, there is no ridge beam. In this case, the roof angle for metal tiles can vary depending on to a large extent, for example, it is allowed to make slopes both with a slope of 14 degrees and 60 degrees. However, optimal value varies between 30-60 degrees.

Also, all types of roofs can be divided into exploitable and non-exploitable. The second option implies that there is no attic floor between the roofing system and the living spaces. That is, the height of such a space does not exceed 1-1.5 m. As a result, the construction of a roof with an inclination angle of up to 7 degrees is allowed. It is worth noting that to determine the angle of the roof, quite a few factors should be taken into account. How to correctly calculate and understand what the angle of inclination of a metal tile roof should be?

Optimal roof slope angle

Perhaps the determining factor will still be the weather, in particular, it is worth considering:

• how much precipitation falls in a particular area;
• how many clear and sunny days there are;
• how heavy the snowfalls are;
• what are the wind loads and so on.

So, if the snow level in the region is quite high, then the recommended angle of inclination of a metal roof can be 45-60 degrees. With such a slope, snow masses easily slide off the metal surface on their own and do not exert significant pressure on the structure. If constant strong winds are observed, then the slopes of the slopes should be reduced to reduce the windage of the structure. In such conditions, the tilt angle can be in the range of 10-30 degrees. However, in most regions, most often, there is an average of snow masses, and wind loads, so the roof slope will be 30-45 degrees. You can find out exact data on snow and wind loads in the relevant SNiPs in force in the country or region.

Important! Optimal slope metal roofing is exactly 45 degrees, since at 25-30 degrees even a small amount of snow or ice will exert quite significant pressure, and they will not be able to remove from the slopes on their own. If you need to reduce this indicator, then it is optimal to install a warm type of roofing system or hire special services to eliminate snow drifts.

To determine the correct maximum and minimum slope of a metal roof, one design solution is not enough. It is important to take into account all the other factors listed. It is much more profitable to build flat roofs than to make them sharp. Since in this case minimal financial investments. However, if among the advantages it can also be noted that on the surface of such a roof it is easy to arrange separate place for relaxation, then the disadvantages include such a nuance that numerous precipitations can easily be short term will spoil the appearance of the coating. As for weather conditions, in general you can proceed as follows: with an abundance of precipitation, both snow and rain, the angle of inclination of the metal tile roof should be increased. If the region experiences frequent hurricane winds or just strong gusts, it is recommended to reduce the slope. At the same time, it is undesirable to make roofs with a slope angle of less than 14 degrees and more than 60 degrees. Of course, on flat roofs You can always install an additional outflow of water, for example, by filling it up as drainage system expanded clay, but often pitched roofs provide more convenience, as they allow the existing under-roof space to be used as an attic for household needs and even as a living space, read more:

It is also worth considering that optimal inclination Metal roofs are determined by building codes. That is, manufacturers of roofing coverings are required to indicate in the instructions for the material what minimum and maximum slope angle this product is designed for. It is important to understand that it cannot be perfect angle tilt, and in each construction project this parameter must be calculated separately, based on operating conditions, type of roof, structure configuration and many other related factors. In addition, it is worth relying on current SNiPs, in which, for example, it is stated that with a slope length of 6 m, it is allowed to make the angle of inclination of the slope covered with metal tiles from 14 degrees. Such a low figure is due to the fact that they are distinguished by high rigidity and low roughness, due to profile profiling and smooth polymer coating, which means the product can successfully withstand many negative factors environments, even without the optimal tilt angle of 45 degrees for most cases.