The angle of inclination of any roof significantly affects its reliability and tightness. The minimum slope of a roof made of metal tiles, according to the requirements of SNiP, must be in the range of permissible values. Failure to comply with this rule may lead to a number of irreparable consequences. Roofing made of metal tiles has a number of characteristic features associated primarily with the specifics of this material.
Metal tile as a roofing material is very popular. It can be used for arranging roofs with various geometric shapes. It does not exert a large load on the structure. Installation of a metal tile is absolutely not difficult and within the power of any roofer. A diverse range of colors of this material is very convenient when creating any design. When choosing it, it is necessary to take into account the slope of the roof.
Side c - ½ width. So a=3, c=4. From the secondary school program tg A=а/с. Total tgA=0.75. We look at the table of tangents on the Internet. The angle is 37 degrees. The SNiP directly prescribes the values \u200b\u200bof the minimum angle of inclination of the roof, taking into account the type of material and climatic conditions. Given the requirements of SNiP, the minimum roof slope, with a slope length of 6 meters, is 14 degrees.
The minimum slope requires the installation of additional waterproofing to prevent moisture penetration. To do this, a layer of silicone sealant is applied to the joints.Even in advance, when purchasing a metal tile, you should pay especially close attention to the recommendations of its manufacturer. As a rule, he recommends designing a slope angle of 12 degrees. There is a more durable material with the possibility of mounting and at an angle of 11 degrees. Such a metal tile is made with a smoother surface, which contributes to good sliding. If you do not take into account the recommendations of the manufacturer and perform a roof with a lower angle of inclination of the slope, then as a result of heavy snowfall, there may be a risk of roof collapse. The minimum slope angle is typical for regions with a warmer climate, where the amount of precipitation in the form of snow and rain is minimal. At the same time, the roof perfectly resists large wind loads.
This design is especially relevant for areas in which the number of sunny days per year reaches a maximum. Since the roof area with such a slope is smaller, then heating it in the summer creates less discomfort for the residents of this house. Moreover, with a smaller roof area, a smaller amount of metal tiles will be consumed. And this is a pretty good option to save the budget. Since there are no strict requirements in SNiP as to what the minimum slope of a metal tile roof should actually be, then it must be chosen according to the recommendations of the manufacturer of this material. As a rule, its value varies between 11 and 15 degrees. Its increase entails additional consumption of metal tiles. Excessive reduction requires additional waterproofing and installation of additional structures for reinforcement. Therefore, the optimal solution to this problem is to choose the average value. We recommend watching the video
How long the house will stand and its roof will last depends on what kind of roofing material will be used. Naturally, it is also important how the building will look externally, as well as how environmentally friendly the roof will be. In our time, metal tile has become the most popular material. It has high rates of resistance to the effects of the external environment, intense loads, and also has a good bearing capacity. Naturally, besides this, for long-term service, you need to correctly choose the minimum angle of inclination of the roof from metal tiles. What optimal parameters to use for this characteristic is described in the article.
Source dom.germanovich.comThis material has several advantages:
metal tile light in weight. One square meter falls from five to seven kilograms. With its help cover the roof, which has a complex structure. Due to its lightness, it is unnecessary to strengthen the rafters. This roof does not load the walls and foundation.
Due to the ease of installation of roofing material and the absence of the need for special tools, cost of work installation is relatively low.
This roofing material is wide color palette, thanks to which you can choose any of them to fit the overall tone of the building.
Tiles are made from thin sheets of steel, the thickness of which is from 0.4 to 0.7 millimeters. Thanks to her profile, she is able to withstand heavy loads.
Anti-corrosion sheet roofing material protected galvanized and polymeric protective layer, which is applied to the surface.
The main advantages of the material are durability, low cost and aesthetic appearance.
The slope of the roof is the angle that forms between the roofing material and the ceiling.
In documents, it is indicated in percent or degrees. It is calculated by mathematically dividing the distance from the highest point at the intersection of the rafters, which is called the ridge, by one second of the entire width of the building. Depends on the slope of the roof:
what material the building will be covered;
design frame roof and its main parts;
as far as the roof can resist atmospheric phenomena;
price works of masters of roofers;
the weight all layers used.
On a note! If the slope of the metal roof is changed from 22 to 45 degrees, then the slope will increase by 20%. And this will significantly affect the cost of roofing materials, as well as the weight of the entire structure. In this case, the slope must be determined during the design of the entire building in order to have an idea of the load on the foundation.
For those people who are completely ignorant of construction, it is very difficult to determine exactly what the minimum roof slope should be. Here you need to take into account natural factors that constantly affect the roof. These include:
snow layer which will fall in the winter. If the slope angle is greater, then the snow will slide off by itself.
On our website you can find contacts of construction companies that offer services roof design and repair. You can directly communicate with representatives by visiting the exhibition of houses "Low-Rise Country".
Ability wind resistance. In such regions where the winds are constantly blowing, it is necessary to make the slope minimal so that gusts of wind slide over the roof and do not create the effect of a sail.
Since this material for covering the building is very light, the lathing is allowed rare, but when installing the rafters, you must strictly adhere to the distance and angle at which they will be installed.
The minimum slope of a metal tile roof is 10 degrees. A slope is allowed, which ranges from 10 to 90 degrees. When choosing the optimal slope angle, it must be taken into account that with a small degree, the space between the roof and the ceiling cannot be used for any economic purposes.
If the largest roof angle for metal tiles is set, then it will be very difficult to go onto the roof in order to carry out technical work. Moreover, the larger the angle, the higher the ridge is and, accordingly, the area that needs to be covered increases.
Thus, more roofing materials will be needed, and this will be displayed on the budget. In addition, the payment for roofing work will also increase. Source bankfs.ru
When correctly calculating the angle of the roof for a metal tile, the calculator must take into account the following aspects:
tile model. It should be noted that most manufacturers in the product description indicate the minimum slope of the metal roof.
Which roof view planned: single or double.
How will get out the snow from the roof.
Having made all the calculations, and taking into account the above points, provided that the length of the slope surface is 6 mp, a minimum slope of 22 degrees is set. Naturally, this result is not indicated in the technical documentation. It is calculated by experienced craftsmen in the process of observing roofs already in use.
To determine more precisely what the minimum slope of a gable roof made of metal tiles should be, you need to know two numbers:
height from the top of the parapet to the ridge;
width building.
To make the calculation, the distance from the parapet to the ridge is divided by the value of half the wall, and as a result, the desired angle is obtained.
To determine the result as a percentage, the resulting number must be multiplied by 100.
Important! In order for the result to be accurate, it is necessary to measure the distance to the ridge not from the floor surface, since this is a gross error, but from the top of the parapet.
Naturally, in construction there are exceptions when the slope is only 10 degrees. But this is done in the case of special recommendations for construction. It should be borne in mind that with such a slope, an increased load on the surface is created when snow falls. Thus, the crate is made continuous. In addition, a waterproof carpet must be laid on it. Also, special gaskets are placed under the butt sides of the roofing sheets.
In the video you can see the low angle of the roof:
It is best, when working with metal tiles, to know the instructions from the manufacturers and follow them all implicitly. In addition, we must remember that experience cannot be replaced by anything, therefore, it is better to trust all installation work to professionals. Turning to a reliable construction company, you get the speed of work and a documented guarantee.
Metal tile is one of the most popular roofing materials due to its lightness and ease of installation. The only difficulty that developers have is the question of what is the minimum slope of a metal roofing roof that is allowed during construction. The optimal angle of inclination is determined at the design stage, taking into account all the factors, which we will discuss below.
In order to correctly calculate the roof slope, it is necessary to take into account several factors that determine this value:
The load of snow masses is the level of snow that will accumulate on your roof without sliding down under the weight of its weight.. It is very important to find out at the design stage what the level of snowfall is in a given region in order to make all calculations correctly and prevent possible deformation of the roof under the weight of snow.
Types of pitched roof construction
. Information about the strength of the wind in the development region, as well as all possible disasters for this region, should also be studied in advance.In addition, the minimum angle of inclination of a metal roof is affected by the presence of heating pipes and thermal insulation of both the roof and the house itself.. Very often you can find such a picture when two adjacent houses with the same roof slope have different levels of snow masses on the roof. If you look closely, then the house with the least snow always has heating or heating pipes, the heat of which heats it up.
However, if the thermal insulation of the roof is strengthened, the snow will melt much worse, because the roof will no longer give off heat that melts the snow masses. That is why the calculations are made simultaneously with the choice of insulation.
Minimum value The angle of inclination of the roof is influenced by many factors, including the shape of the roof and the level of precipitation. The minimum slope of a metal tile roof is only 14 degrees.. However, this value is considered appropriate only for ideal operating conditions: in a mild warm climate, without precipitation in the form of snow or rain.
If a shed roof structure is planned, the optimal slope of the elements is 30 degrees. If the roof is built with two slopes, it is worth making a slope of 40-45 degrees.
As already mentioned, the amount of precipitation has a direct impact on the choice of the minimum angle of inclination of a metal roof. For example, if it is less than 22-25 degrees, then sooner or later moisture will begin to get directly into the roof joints. In addition, a small slope will not allow snow masses to freely roll off the slope of the roof, they will lie like a dead weight on the roof, compacting and gradually deforming it.
On the other hand, a 25-degree angle is ideal for windy, windy terrain, as the level of blowing will be minimal.
Heating consumption at different angles of inclination of the roof A small angle of inclination in private construction is used extremely rarely.. The optimal operating conditions for a house with a small roof slope is a warm, mild climate, where sunny days prevail, because such roofs are heated mainly from solar energy. Thus, our area is not well suited for such a construction.
The angle of inclination, practiced in domestic construction, is much larger than the minimum, i.e. 14 degrees. The main task is to find the optimal value for a particular roof, so to speak, the golden mean between a good level of resistance to both precipitation and winds.
The larger the angle of inclination of the structure, the larger its entire area, i.e. the windage of the metal roof increases, and the snow will roll straight down without stopping on it.
Snow does not roll off the roof
Naturally, the larger the total area of the tiled coating, the greater the material consumption. Thus, a roof with a large angle of inclination is much more expensive.
That is why most developers do not immediately seek to make the largest slope, but try to find the minimum allowable slope angle, which will allow them to save a lot.
In addition, the overall strength of a roofing structure made of metal tiles can be increased not only by reducing the angle of inclination, but also through the use of frequent lathing.
A crate with a minimum distance between the elements will create a kind of shock-absorbing cushion and increase the strength of the internal structure of the roof.
The crate reinforces the structure Thus, if your region has the most unfavorable conditions, implying a large amount of snowfall, then it is better to strengthen the crate and make the slope angle larger. Well, if there is little precipitation in the region, but very strong gusts of wind, it makes no sense to make the maximum slope, because it will be subjected to a huge wind load and may not withstand it. It is best to choose an average value.
The durability and quality of the roof directly depends on the correct selection of the coating material. Not the least important selection criteria are appearance and compliance with environmental standards. Among specialists, the opinion has long been strengthened that they fully meet these requirements.
Of the three types of metal roofing material, profiled sheet coating stands out favorably imitating natural tiles - metal tiles.
Its basis is rolled steel coated with an aluminum-zinc compound to resist harmful environmental influences. For increased stability, the finishing layer on the metal is additionally applied polymer coating. In this article, you will learn how to calculate the roof angle for a metal tile and what factors affect the roofing.
Affordable price and increased performance characteristics allow metal tiles to occupy a leading position in the roofing materials sales market.
The positive aspects of its use are:
Among the shortcomings, users and experts most often note:
NOTE!
It should be noted that there is a type of metal tile with an additional protective layer as a topping of natural stone chips. Unlike classic spraying, this composite coating gives a solid appearance and well protects the house from noise penetration.
The composition of the roofing sheet
Qualitative indicators metal roofing in many ways depends on:
Main factors that adversely affect the condition and durability metal tiles are divided into three types:
short-term
Long
Special
All components in the construction of the truss system are guaranteed to ensure the resistance of the metal-tiled coating to the maximum allowable overloads.
Sheets of profiled metal have sufficient rigidity, so when not required. But when constructing a rafter system, it is necessary to correctly calculate the pitch and angle of inclination of the rafter leg.
Minimum Angle metal roof slope is 10 degrees.
Permissible slope metal roof can be values ranging from 10 o to 90 o.
In choosing the optimal slope, it must be taken into account that if the slope is too small, it will be difficult to use the attic space.
In the case of a high building height, it may be difficult to access the roof for technical measures. From an increase in the angle of inclination, an increase in surface area occurs, which will negatively affect the final cost of materials and work performed.
Correct calculation tilt angle parameters impossible without taking into account such components:
Taking into account these conditions, without having additional input in the form of a special climatic zone, we can take as a basis optimal slope with a slope length of about 6 m. p. a value of 22 degrees.
This figure is not in the technical documents for the installation of roofs, it was obtained empirically as a result of observations of the exploited metal-tiled surface.
How to choose a roof angle for a metal tile?
For an accurate calculation of the angle of inclination, it is necessary know two sizes:
For a shed roof, the slope will be the value obtained by dividing the height of the structure by the width of the house. In the case of calculating a gable roof, the height is taken and divided by half the width of the house. Since it is customary to express slopes as a percentage, the resulting figure is multiplied by 100.
To obtain a more accurate result, use not a floor slab as a reference point for the distance to the ridge, as many mistakenly believe, namely parapet top, as the basis for supporting the rafters.
In practice, there are options for roofing, the minimum slope for metal tiles is less than 10 degrees. These exceptions apply specific building instructions.
The step of the metal tile depending on the angle of the roof
In view of the increased snow load, a reinforced structure of the truss system is made with a device solid battens. A waterproofing carpet is laid on it, subject to all norms. When laying under the transverse and longitudinal joints of the sheets, special gaskets are installed.
We invite you to watch a video tutorial on self-measurement of the corner of the roof:
Among all modern roofing materials, metal tiles are considered the leader in consumer sympathy. Why did this particular roof become so widely used? To answer this question, you need to compare the technical and operational characteristics of metal tiles and other roofing materials.
The minimum angle of inclination of the roof from a metal tile
| Parameter | Brief comparative characteristic |
|---|---|
 |
The weight of metal sheets ranges from 5–7 kg/m2, the spread is associated with different thicknesses. The corrugated board has the same mass, the differences between both roofs are only in the geometry of the profile. Only roll coatings weigh less, but they have limited areas of use. All other roofing materials weigh much more. For example, a square meter of ordinary slate can weigh more than 30 kg. The mass of the coating is an important technical parameter, the truss system depends on it, sometimes the weight of the roof must be taken into account when calculating the foundation of the building. |
| Manufacturability of installation |
For the manufacture of metal tiles, thin-sheet steel up to 0.6 mm thick is used. Such sheets can be cut without problems not only with electric, but also with manual special tools. The disadvantage is a significant amount of waste metal tiles during the coating of complex pitched roofs. |
| Operating time |
If the material is made by responsible manufacturers, the thickness and quality of the zinc layer is precisely maintained, and innovative polymer coatings are used to finish the outer layers, then the service life can exceed fifty years. But the problem is that consumers do not have the opportunity to independently and objectively control the quality of galvanizing and the parameters of polymer paints, they have to trust the advertising of manufacturers or distributors. And among them there are quite a few unscrupulous. In terms of service life, metal tiles are second only to piece natural tiles, but only in the case of high-quality and expensive types of coatings. |
| Design qualities |
Despite the efforts of technologists to bring the appearance of metal and natural tiles as close as possible, the similarity between them, except for the name, is very conditional. The color palette is very wide, from natural to blue and other very original colors. This, on the one hand, increases the design possibilities of architects, and on the other hand, makes even more noticeable and so big difference in the appearance of metal and natural tiles. The presence of the word "tile" in the name of the product is a good marketing ploy to increase the number of sales. Consumers react positively to such advertising - everyone has real respect for tiles. |
| Price |
For comparison, you need to take the average cost of all price categories, and the spread is quite large. At an average cost, a metal tile is cheaper than only piece coatings, while other roofing materials have a lower price. In fact, one should take into account not only the cost of materials, but also the financial costs of their installation. With such a comprehensive comparison, the metal tile is second only to the metal profile. |
If a decision is made to use metal tiles for covering the roof, then the manufacturer's recommendations should be strictly followed to ensure tightness. They regulate several parameters of the rafter system and slopes, including the minimum angle of inclination.
This indicator is important not only for metal tiles, but also for all other types of roofing. What parameters depend on the angle of inclination of a metal roof?
Previously, the slope was determined only in degrees, this value was clear to all builders and they could imagine the appearance of the roof without a drawing. Recently, another definition of the magnitude of the slope has been introduced into the building codes - as a percentage, there has been more confusion, which few people know about the changes. If roofers easily understand how the roof slopes are at an angle of 30 °, then few of them can draw a rough sketch of a roof with a slope of 57.7%. Although these are the same 30 °.
Slope - the ratio of the height of the roof in the ridge zone to half the width of the building, calculated by the formula
I% = H×0.5L×100, where
For example, if the height of the ridge is 1 m and the width of the building is 10 m, then for a gable roof the slope is 1:0.5 × 10 × 100 = 20%.
This formula is used for gable roof systems. In our case, it needs to be adjusted. The fact is that there are no gable roofs with a minimum angle of inclination, these are options for only single-pitched truss systems. This means that it is not necessary to divide the width of the building by two, the formula changes. For flat pitched roofs, the slope is determined by the formula:
That is, in the above example, the calculation is performed as follows: 1:10×100=10%.
In order to calculate the length of the slope based on the percentage of slope, it is necessary to use special tables or geometric formulas. If one of the sides of a right triangle is known, then the slope percentage allows you to calculate the second leg, then the angle is calculated using trigonometric formulas, and only after that the length of the hypotenuse of the right triangle is calculated. The length of the slope is the main parameter during the design of the truss system and determining the amount of materials for covering the roof. Without this value, it is impossible to buy the right amount of metal tiles, choose the best option for roofing, and decide on the architectural style of the building.
In degrees, the angle of inclination is determined much easier; all existing construction tools use the principle of an ordinary school protractor in their work.
Of course, with such parameters there can only be flat pitched roofs. Most developers think that the slope of the roof is only needed to drain water and minimize snow accumulation. Is this really the case, let's find out in more detail. Design features of the appearance are not related to engineering calculations and are not taken into account yet.
Manufacturers indicate a minimum angle of inclination of 10–11 °, why is there such a restriction?
Roof slope ratings have a significant impact on roof performance. Not all of them are positive, there are also negative ones.
The minimum slope angle for a roof made of metal tiles is very rare in practice. Why do developers not want to have such structures on their buildings? What are the benefits of increased slope? The simplest and most correct answer is that natural tiles are laid only on slopes with a slope of at least 30 °, respectively, its metal imitation will look very strange on flat roofs.
How to determine the angle of inclination
In addition, a large angle provides the following advantages.
An example of a hip roof with a large angle of inclination
There are also negative aspects of increasing the slope of the roof slopes.
On roofs with a large angle of inclination, snow guards are necessary
Practical advice. The greatest amount of snow accumulates on slopes with a slope of 20-35°, this should be borne in mind when making a final decision.
Most buildings with metal roofing have an angle of inclination in the range of 45–60 °, the higher the inclination, the more comfortable the attic rooms. The choice of the optimal angle of inclination should begin with an analysis of the weather conditions.
Important. When choosing the parameters of the truss system, one cannot take into account only the advice of designers, the main attention should be paid to the reliability and practicality of the design. And these parameters depend on engineering solutions and the correct calculations of the roof elements.
During the design of flat roofs with a minimum slope, architects take all measures to increase the stability of the structure. From the many existing options for solving the problem, those that require minimal financial investments are selected.
This allows the use of ordinary boards with a thickness of not more than 50 mm for their manufacture. Economic calculations show that it is much more profitable to reduce the pitch by about 10–15 cm than to make a truss system from thick lumber.
Edged board rafters
Not all truss systems allow the use of this method, but at the slightest opportunity, designers provide for them. The fact is that for the manufacture of stops, you can use the cheapest materials, including used ones. Only vertical forces act on them, and the lumber holds them perfectly. The boards have low values of resistance to bending, they work very well in compression.
Rafters on supports
Flat roofs are shed, they do not have valleys, this greatly simplifies the process of building structures and reduces the likelihood of leaks. But such structures have their own problems - a high probability of undermining the sheets of metal tiles with gusts of wind. This is explained by the fact that a significant speed of movement of air masses along the surface of the coating creates a rarefaction above it. Accordingly, there are significant efforts that tear off the sheets from the crate. Self-tapping screws for fixing metal tiles have rubber gaskets to seal the holes. If they are often compressed / unclenched, then microcracks form due to material fatigue. In the future, they increase in size and can cause water leaks.
Self-tapping screws for metal tiles
For flat roofs, leaks are more dangerous than for pitched roofs for two reasons.
flat roof house
Manufacturers recommend screwing self-tapping screws in a checkerboard pattern through the wave. But this recommendation is justified on pitched roofs with a slope of at least 20 °. For flat roofs, professional craftsmen advise reducing the distance between the hardware. This is done in order to increase the reliability of fixing sheets of metal tiles and eliminate the likelihood of them being blown up by the wind.
The more carefully you approach the choice of the slope of the roof from the metal tile, the less problems will appear during the operation of the building. It must be remembered that sometimes the cost of repairing a roof can exceed the cost of building a new one. And if, due to leaks, it is necessary to change the decoration of the walls and ceiling of the interior, then you will have to lose very large financial resources.
Mistakes in the construction of the truss system are not only expensive, they have an extremely negative effect on the life of buildings, you should always keep this in mind. If your own knowledge is not enough, it is recommended to seek help from professional specialists. This will cost much less than the elimination of construction errors.
The foundation and the roof are the two most important and complex architectural elements of any building. The load-bearing elements of the roof are the truss system, and its performance largely depends on the angle of inclination of the slopes. Ordinary developers choose the optimal roof slope based on criteria other than designers. And how to choose and calculate the optimal angle of inclination of a gable roof, read on our website.
Affordable price and increased performance characteristics allow metal tiles to occupy a leading position in the roofing materials sales market.
The positive aspects of its use are:
Among the shortcomings, users and experts most often note:
NOTE! It should be noted that there is a type of metal tile with an additional protective layer as a sprinkle of natural stone chips. Unlike classic spraying, this composite coating gives a solid appearance and well protects the house from noise penetration.
The composition of the roofing sheet
The quality indicators of metal-tiled roofs largely depend on:
The minimum angle of inclination of a metal roof is 10 degrees.
The permissible slope of a metal roof can be between 10o and 90o.
In choosing the optimal slope, it must be taken into account that if the slope is too small, it will be difficult to use the attic space.
In the case of a high building height, it may be difficult to access the roof for technical measures. From an increase in the angle of inclination, an increase in surface area occurs, which will negatively affect the final cost of materials and work performed.
The correct calculation of the parameters of the angle of inclination is impossible without taking into account the following components:
IMPORTANT! Taking into account these conditions, without having additional inputs in the form of a special climatic zone, it is possible to take as the basis for the optimal slope with a slope length of about 6 m. p. A value of 22 degrees.
This figure is not in the technical documents for the installation of roofs, it was obtained empirically as a result of observations of the exploited metal-tiled surface.
How to choose a roof angle for a metal tile?
To accurately calculate the angle of inclination, you need to know two dimensions:
For a shed roof, the slope will be the value obtained by dividing the height of the structure by the width of the house. In the case of calculating a gable roof, the height is taken and divided by half the width of the house. Since it is customary to express slopes as a percentage, the resulting figure is multiplied by 100.
To obtain a more accurate result, use not the floor slab as a reference point for the distance to the ridge, as many mistakenly believe, but the top of the parapet, as the basis for supporting the rafters.
In practice, there are options for roofing, the minimum slope for metal tiles is less than 10 degrees. Special building guidelines apply to such exceptions.
The step of the metal tile depending on the angle of the roof
In view of the increased snow load, a reinforced structure of the truss system is made with a continuous sheathing device. A waterproofing carpet is laid on it, subject to all norms. When laying under the transverse and longitudinal joints of the sheets, special gaskets are installed.
>Useful video
We invite you to watch a video tutorial on self-measurement of the corner of the roof:
Roofs made of metal tiles are a practical and popular solution for the construction of private low-rise buildings. This roofing material is characterized by high bearing capacity, resistance to mechanical damage, external environmental factors and heavy loads. The durability and reliability of the finish coating depend not only on quality, these characteristics are influenced by the design of the roof, including the correctly selected minimum slope. In this article, we will tell you how to choose the right slope angle and check it for compliance with SNiP.
The slope of the roof is an important design parameter, which indicates the angle formed by the plane of the floors and the roof slope. This indicator is expressed as a percentage or degrees. It is calculated as the result of dividing the height of the ridge by half the width of the building. The angle of inclination of the slope depends on the technical and operational properties of the material and is regulated by SNiP and the manufacturer's instructions. Depends on it:
Note! If the slope of the metal tile roof is increased from 22 degrees to 45 degrees, the slope area will increase by 20%, which will affect the cost of materials (finishing, waterproofing, insulation, wood), as well as the weight of the structure. It is necessary to decide on the optimal angle of inclination during the preparation of the project in order to correctly determine the load on the foundation.
Roof slope calculation
Roofs made of metal tiles are a relatively new constructive solution, therefore the technology of its installation and operation is not clearly regulated by SNiP. Information about what the minimum roof slope should be is provided by the manufacturer, since this indicator directly depends on the technical characteristics of the material itself. This indicator is calculated in accordance with the thickness, bearing capacity and method of laying the roofing.
The optimal angle of inclination for metal tiles
The choice of roof design
Important! The minimum slope of a metal roof, which manufacturers allow, is 11 degrees. Some grades of material can be laid even if the slope is 10 degrees. The reduction in this indicator has made it possible to achieve the use of new, smoother polymers and stronger steel for the production of roofing.
It can be difficult for a non-professional builder to correctly choose the minimum angle of inclination of a metal roof. This indicator, in addition to the requirements of SNiP and manufacturer's recommendations, is influenced by other factors that must also be taken into account. When choosing the steepness of the slope, the following is taken into account:
Please note that the choice of the steepness of the slopes depends on the design of the roof. The optimal angle of inclination of the slopes of a shed roof made of metal is 20-30 degrees, and a gable roof is 20-45 degrees.
The minimum recommended slope angle of a metal tile roof is 14 degrees, however, experienced craftsmen can lay this type of roofing material with high quality, even if the slope of the slopes is in the range of 10-14 degrees. To increase the reliability of this design and reduce the risk of leaks, the following measures must be taken:
Step between rafters depending on the slope
Experienced craftsmen say that the easiest way to make a reliable metal roof is to follow the manufacturer's recommendations and strictly observe the recommended angle of inclination.
The construction concept of "slope" is associated with the slope of the roof. This is the angle of the slope to the horizontal surface. A smaller degree of angle makes the roof slope steeper. The calculation of the angle is based on the principle: the height of the ridge board is divided by 0.5 of the width of the room, as a percentage - multiply by 100. Visually: we divide the width of 20 m and the height of 5 m and we get 0.5, we multiply by 100 and we get 50%.
The minimum angle of inclination is affected by the climatic conditions of the area. A slope of 30 degrees is used in regions with heavy precipitation. In arid areas, roofs are built with a slope of 10-25 degrees.
Building material - metal tile - is used in the construction of buildings of various complexity. Exception - the minimum angle of inclination for a metal tile is from 14 degrees, no less. Such a slope is able to withstand strong gusts of wind, unlike snow, which cannot roll down such a small slope.
The minimum slope allows you to save on building materials. Reliability and a solid foundation of the roof will be created by a wooden crate, a small distance between its boards will make the fastening of the metal tile strong.
Preliminary Processes:
Detailed introduction to the video in the next tab.
Roof installation involves a complex process, and it is simply impossible to avoid important nuances:
The slope of the roof is formed due to the structure of the rafters, it is they who create the angle. For details on installing the roof and setting its minimum angle, see the video in the next tab.
Tiles - roofing material made of fired clay, plastic or metal.
The metal tile is considered one of the most reliable and durable materials, due to its characteristics, such as wear resistance, practicality and decent appearance. Thanks to her, it is possible to update the old roof. To do this, you do not need to remove the used materials - on the contrary, they will serve as additional waterproofing. For proper installation, the minimum slope of the roof from the metal tile is calculated.
Metal roofing is one of the most durable and strong materials.
Many people have a question, what is a bias. Slope - the angle of inclination of the slope to the horizon. The larger the angles, the steeper the roofs. To calculate the slope, you need to divide the height of the ridge by 1/2 of the width of the building, and to express this value as a percentage, multiply it by 100. For example, with a building width of 10 m and a ridge height of 4 m, the slope will be: 4: 5 \u003d 4 / 5 = 0.8. To express as a percentage, multiply by 100: 0.8*100=80%.
Installation instructions will be incomplete without some rules. It is strictly forbidden:
For cutting sheets, electric nibblers or metal shears are used. Steel shavings and other debris are removed only with a soft brush. To protect the sheet from corrosion, it is necessary to immediately paint over all the scratches found during installation with special paint. Three months after the start of operation, it is necessary to tighten all mounting screws.
Our vast country is located in different climatic zones. If in the Far North and the Far East there is a strong wind and snow, then in the South of Russia there may be rain and wind. You need a very responsible approach to the choice of roofing material and the calculation of the slope of the roof of your house. The most practical is the choice of metal tiles because they are inexpensive, durable and beautiful. But it depends on the expected wind load and, typical for your region, precipitation. So what should be the minimum angles of inclination of your metal roof? This question must be answered.
In modern construction, a wide variety of roofing materials are used, but metal tiles are deservedly considered one of the most popular materials. In many countries, such material as tiles has long been manufactured. Therefore, the use of metal not only reduces the cost of the final cost of the product, but also serves as a harmonious continuation of ancient traditions. The high technical characteristics of metal tiles include:
All of these properties make it possible to use this coating in difficult climatic conditions. To calculate the amount of material, you need to know the minimum angle of inclination of the metal roof.
To calculate the strength of the roof structure and the amount of material needed, you need to know the optimal one. A number of factors must be taken into account, including:
It would seem that the steeper the slope, the better, but this leads to an increase in material consumption and increased weight, as well as to a large wind load on the structure. Therefore, there is such a thing as the optimal angle of inclination of a roof made of metal.
A slight slope, about 10-12 degrees, has its drawbacks, which require an increase in the rows of the crate and reinforcement of the rafters, due to the increased snow load. In addition, you should take care of improved waterproofing and the need to increase the overlap of sheets. This is done to prevent leaks at the joints with gentle slopes. Roofs of this design are best suited for the southern regions, where the snow cover does not have much weight, and the average annual temperature is not too low. In the summer, sloping roofs warm up less, which creates comfortable living conditions in the home.
Steep slopes, ranging from 30 to 45 degrees, are more suitable for regions with lower temperatures and frequent snowfalls, but one must 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. It is necessary to fasten the sheets, in the case of steep slopes, more often than usual, because they are prone to slipping under the influence of gravity. The greater the angle of inclination of the roof, the more time-consuming during installation and less economical it will turn out.
What is the optimal angle of inclination of the roof recommended by the manufacturers of this building material? After the tests, enterprises producing metal tiles recommend using it when the slope is from 11 to 45 degrees. In this case, the most acceptable is the angle of inclination from 12 to 22 degrees. Building codes and regulations do not give clearly expressed recommendations on this matter, but the preferred, with a slope length of about 6 meters, is an angle of inclination equal to 14 degrees. We have come to the choice of the most economical way to cover the roof, which is determined by such a concept as the minimum slope of a metal roof.
Depending on the climatic zone, the architectural solution and the aesthetic preferences of the owners of the dwelling, the following types of roofs are erected:
Multi-gable 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 the middle lane and are characterized by the choice of minimum slope angles ranging from 22 to 45 degrees. The hipped roof is used as a decorative element, and the angle of inclination of the isosceles triangles is in direct proportion to the area covered by the hipped roof. This structural element is very economical to manufacture, and the angle of inclination ranges from 35 to 45 degrees.
One of the most popular roofs, gable. The manufacturer recommends observing the minimum angles of inclination of the roof in the range of 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 such characteristics that the roof resists well to possible strong winds, and also represents an almost monolithic structure that prevents the penetration of moisture into the under-roof space of the building.
For shed roofs, the minimum angles of inclination range from 11 to 14 degrees, since large angles of inclination create the risk of the roof falling off during multidirectional wind gusts. In the climatic conditions of Russia, it is necessary to adhere to the minimum slope of the slopes from 14 to 22 degrees. When building in a flat or mountainous area, it is necessary to take into account the landscape and the wind rose, depending on the season.
In choosing the type of roof, the taste preferences of each person play a decisive role. Everyone wants to build a house so that it is beautiful, comfortable and serves for many years. The roof crowns the building and it receives 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 properly design it and build it correctly. And to save money, you need to choose the right slope of this roof for metal tiles, taking into account the climatic conditions of your region.
The minimum angle of inclination of roofs made of metal tiles is one of the most important parameters, which must be taken into account when developing a project for a truss system at home. A reliable and durable roof will be obtained only if the standards recommended by the manufacturer are observed.
Since roofing sheets of this variety are made of high-quality steel, they can withstand quite serious loads. However, their relief texture contributes to the retention of a large amount of snow on the roof in winter. And therefore, it is still not recommended to do too gentle slopes for this material, as well as for any others, despite its strength.
The minimum slope of a metal tile roof is 12º. But most manufacturers still advise installing rafters under sheets of this variety at an angle of at least 14º. There are also special brands of metal tiles on the market, which can be mounted on very gentle slopes - only 11º. But this coverage option is rarely found on sale. In any case, when buying a metal tile of a particular brand, you should carefully study its technical passport. The allowable slope is indicated in it necessarily.
They make roofs with a slope of 12º quite rarely. Most often, the angle of inclination of the roof slopes of a country house sheathed with metal tiles is 34-35º. This is the best and actually very convenient option. With such a slope, the material does not take too much, and the roof itself looks harmonious and impressive. In addition, it is precisely such an angle that is easiest to make with a standard lumber length of 6 m. A roof steeper than 35 º should be assembled only if it is broken and it is planned to equip a residential attic under it. An angle of 40-45º is considered optimal for layered rafters of such roofs.
This material is installed on the roof frame with the obligatory observance of the following recommendations:
When sheathing rafters with a length of more than 6 m, the metal tile is installed in rows in height. The width of the horizontal overlap in this case is determined depending on the angle of inclination of the slope. The lower the roof, the more water lingers on it during rain and the more airtight the joints should be. Therefore, in the event that the angle of inclination of the roof rafters is 12-14º, the metal tile is laid with an overlap of at least two waves. If this indicator is equal to 14-35º, it is allowed to carry out installation with the overlay of the sheets of the upper row on one wave of the lower one.
Since the material of the metal tile is cold, and during the rain it is also noisy, the roof sheathed with it is usually insulated. At the same time, not expanded polystyrene, but mineral wool is more often used as an insulator. The fact is that fibrous materials, among other things, are very good noise absorbers. In addition to mineral wool, for sheathing the roof with metal tiles you will need:
If the roof is not included, you will also need to purchase all the necessary additional materials: cornice strips, valleys, a pipe apron, a ridge strip, etc.
Of the tools you will need:
Installation of a roofing cake when used as a sheathing of a metal tile is carried out in the following order:
Principles of insulation In total, there are two large classes of roof construction: flat and pitched (or attic). BUT…
