In cottage country construction, a new modern roofing material - metal profile sheets - has become widely used.
Metal profiles should only be laid on a rigid base.
A roof made of metal profiles is mounted from sheets of different color range, which allows you to give a unique look to the entire structure.
Main characteristics of metal profile sheets for roofing
Metal profiles for roofing are produced in the form of sheets with the following parameters: width - 1100 mm and 900 mm. The length of the sheets is different, according to the order. Thickness metal profile 0.45-0.8 mm.
Steel sheet profiles, or corrugated sheets, are used to cover the roof as a roofing material. They are manufactured in accordance with GOST 380-71. Metal profile sheets with a corrugation height of 44 mm are used to cover the roof. In suburban construction, bent profiles with sealed joints are used. They are made of galvanized steel, having a thickness of 0.6 to 1.5 mm. Applicable paintwork. The leaf has a length of 12.5 m.
The metal profile is lightweight, so transportation is not difficult. Service life is about 50 years. Roofing installation is carried out year-round. The metal profile is resistant to high and low temperatures, not subject to corrosion. Easy to install on roofs with your own hands. Developers with any financial capabilities can purchase it.
According to GOST 75-66, all manufactured sheets are marked. It indicates the sheet designation, length in the package and quantity. The weight of the package must be measured, and the batch information and package number must be indicated on the label. To cover the roof, use a metal profile marked “H”, the wave height will be 35 mm.
Single-pitch and gable roofs made of metal profiles
IN dacha construction pitched roofs covered with a metal profile. The inclined plane of the roof will last a long time if the angle of its inclination is correctly calculated. It is directly dependent on the area of the building and the materials used. The roof can have an angle of inclination from 5 to 60°. Consumption roofing material increases with a greater roof inclination angle. For a metal profile, the greatest angle of inclination of the slope is 25°.
The installation of a gable roof made of metal profiles begins after measuring the roof slope. Permissible value is 1:7.
How to calculate the required material for a roof
First of all, calculate the number of rows. If the sheet has a total width of 1.19 m, and a working width of 1.11 m, then the sheets are calculated horizontally along the roof slope. Measure the length of the horizontal slope and divide it by the working width of the sheet. The horizontal overlap of the rows will be 1.19 - 1.11 = 0.08 (m). Calculate the total number of sheets to form a row, as well as the length of the sheets: D=A+B+C, where - A is the length of the slope, B is the overhang of the cornice 0.05 m, C is the overlap of sheets in the vertical direction 0.15 m.
When calculating required quantity self-tapping screws, you need to know the entire roof area. It is multiplied by 8, and the result will show required quantity self-tapping screws The volume of thermal insulation is calculated by multiplying the entire roof area by 0.2 m (by the thickness of the insulation).
Waterproofing is calculated by dividing the entire roof area by 65 m² (covered area). The result will show the number of rolls to complete the job.
Tools and materials required for installing a metal profile roof
It is necessary to prepare the entire set of tools for work. Do-it-yourself installation technology involves the use of tools such as:
Tools for installing corrugated sheets: 1 - screwdriver; 2- hammer drill; 3 - rubber hammer (mallet); 4 - brush with soft bristles; 5 - roulette; 6 - long rail; 7 - marker; 8 - level; 9 - a tool for cutting siding and building profiles.
- saw;
- drill;
- measuring tool;
- pencil;
- fine mesh grid;
- self-tapping screws 4.8x38;
- screwdriver;
- hammer;
- hacksaw for metal;
- cylinders for touching up cuts and abrasions;
- long hooks;
- jigsaw;
- drill with ratchet clutch;
- nails (25 mm).
Required materials:
- wooden blocks;
- boards;
- waterproofing material.
The main stages of installing a metal profile on the roof
Installation begins with laying a layer of waterproofing, which will prevent moisture from penetrating into the insulation, onto the sheathing and rafters.
After all has been purchased necessary tool, you can begin installing the profile on the roof. For ease of use, and to avoid mistakes, it is necessary to make a roof plan in advance, indicating its main components:
- linings;
- lathing;
- cornice strip;
- roofing slab;
- through output;
- ridge and end strips.
The roof lining technology involves the use of a superdiffuse membrane. Take into account the roof slope, which is 1:7 (8). Work on such a roof is carried out especially carefully. The lining device prevents the formation of condensation and protects the thermal insulation. The lining should be laid from the overhang to the ridge. It is attached using 25 mm nails. The pitch will be 20 cm. It is attached to the rafters with a counter batten. The folded edges are secured to the end board with nails.
Installation involves lateral overlap; the value of which will be ½ the length of the profile wave. It is necessary to make it wider for a flat roof. For a roof with a slope of more than 10°, the overlap will be 10 cm. The slabs are fixed above the laths; the overlap on the roof is 200 mm, and on the wall - 10 cm. It is easy to attach the extended area to the sheathing in a wave deflection. Profile grades PK-20, PK-57 are used. Do-it-yourself installation is carried out from the end of the roof.
Fastening the metal profile during installation
Metal profile sheets are attached with self-tapping screws (4.8 x 3.8) to the plates. They are screwed into the bend of the profile wave. Consumption of self-tapping screws - 6 pcs. per 1 m². The calculation is carried out in such a way as to fasten the screws on the crest into the deflection of the second wave, and in the middle - into the sheathing board. The sheets are connected to each other with self-tapping screws. Step: 1 m - for the wall, and 0.5 m - for the roofing profile. The installation of the cornice strip begins before the slabs are fastened; an overlap of 100 mm is performed. Fasteners are made with nails with a pitch of 300 mm.
The installation of sheets on the ridge strip begins with the installation of profile seals. The overlap of the planks is 100 mm. It is better to make fasteners with screws, but you can also use rivets for the job. The pitch will be 300 mm. For the slab at the end of the roof you need to make a large overlap. It will be 50 mm. The fasteners are made with screws in such a way that the entire strip completely covers the wave of the slab profile. The pitch will be at least 300 mm.
A strip with a seal is mounted in the junction area. They scratch the wall at the junction; fasten with dowels and seal the seam. The profile is attached to the bar with a self-tapping screw. Attach to the largest part of the wave. This takes into account the direction of the wind and the coefficient of thermal expansion in the middle of the sheet. On the ridge, self-tapping screws 80 mm long are used for fastening.
Does not present any special difficulties due to high technical characteristics this type of roofing material.
Metal profiles or corrugated sheets are a modern, durable material made from high-quality galvanized steel. Raw materials are produced in the form of sheets. The enormous popularity of the material is explained by its affordable cost, low weight, and easy assembly.
IN modern construction metal sheets are used very often. In this article we will look at how to cover a roof with a metal profile with your own hands. We will also describe this important point as a technology for correct cutting of roofing material and methods for attaching corrugated sheets.
Selection of material for installation
The first thing you need to ask from the metal profile seller is installation instructions. If of this document no, the material is not certified and it is not recommended to buy it. In the instructions for different types corrugated sheeting has many general points, but there are also a number of features that the manufacturer must take into account in the document.
When choosing sheet sizes, you must follow this rule: the length covering the roof from the ridge to the eaves + 45-55 mm (overhang). Subject to such calculations, transverse joints will not form. If the distance between the ridge and the eaves is large (1 strip will not be enough to cover it), then the metal profile sheets are chosen in such dimensions that will allow you to conveniently transport raw materials and lift them to the roof.
Important: when choosing the size of metal profile sheets, the amount of overlap is taken into account. The latter is determined by the angle of inclination of the roof of the house.
Installation of sheathing for metal profiles
When installing a metal profile on the roof, a sheathing device will be required. The structure can be assembled either from wooden beam(necessarily impregnated with antiseptics) or from a metal profile (wall thickness of at least 2 mm).
Important: these restrictions for metal profiles are mandatory. If the thickness is less than specified, you will need to drill a hole for each roofing screw. The drill on roofing screws is designed for drilling metal with a thickness of no more than 2 mm.
The sheathing pitch is calculated depending on bearing capacity metal profile. For convenience, you can use the table below.
Corrugated sheet | Roof inclination angle, degrees. | Sheet thickness, mm | Lathing step |
| S-8 | not less than 15° | Continuous sheathing |
|
| S-20 | up to 15° more than 15° | 0,5... 0,7 0,5... 0,7 | Continuous sheathing Up to 500 mm |
| S-21 | up to 15° more than 15° | 0,5... 0,7 0,5... 0,7 | Up to 300 mm Up to 650 mm |
| NS-35 | up to 15° more than 15° | 0,5... 0,7 0,5... 0,7 | Up to 500 mm Up to 1000 mm |
| N-60 | not less than 8° | 0,7, 0,8, 0,9 | Up to 3000 mm |
| N-75 | not less than 8° | 0,7, 0,8, 0,9 | Up to 4000 mm |
Even with professional lathing installation, temperature differences during inner layers metal profiles for the roof will cause condensation to form in the places where the sheets are fixed. This may cause corrosion of the coating. In addition, if moisture gets on truss structure the risk of its rapid destruction will also increase.
Installing a ventilation gap and a vapor-permeable membrane will help protect the roof from condensation. The membrane is laid on the rafters and fixed with wooden planks (the thickness of which should not exceed 30 mm). The sheathing is installed on top of these strips. The gap that was created wooden planks, will provide necessary ventilation and condensation will not form inside the profiled sheet. In addition, the material will not heat up from internal heat buildings, and this will ensure uniform melting of snow on the roofs.
How to cut metal profiles
When installing metal sheets, it is very important to cut them correctly. Violation of technology will lead to damage to the upper polymer 
layer. For cutting, you must use cutting shears and a reciprocating saw (for cross cutting).
Discs are also suitable for work, but with carbide teeth. To cut along a sheet, you can use metal scissors, but if you need to cut across, such a tool will not work. There is a risk of deforming the metal profile; damaged sheets, even if they are leveled, are difficult to install.
Important: Cannot be used for cutting abrasive tool, for example, a grinder. When working with such tools, high temperatures are generated, which contribute to the rapid burning of metal sheets and the formation of corrosion. Also, experts do not recommend using welders. The latter not only destroy the outer polymer layer, but also damage the structure of the sheet.
Important: you can only use the tool recommended above for cutting, even if this will lead to an increase in the time spent on installing the metal profile on the roof. Otherwise, deformation of the roofing material cannot be avoided.
Installation of metal profile
Before you begin assembling a roof from a metal profile, you need to lift the sheets to the work site. For this purpose, logs are used. The lift must involve at least 3 people.
Important: lifting is carried out one sheet at a time and only in calm weather!
Laying the metal profile begins from the end of the house. If you are installing sheets on a roof that has a drainage groove, then you need to lay the next sheet so that it overlaps the groove of the previous sheet.
The sheets are fixed strictly perpendicular to the cornice. Special attention must be given to the first sheet. From him correct installation the quality of further work depends.
If installation is carried out on gable roof, then installation starts from the end located on the right or left. For hip roofs laying begins from the middle of the hip.
Important: to control the horizontal laying of the slopes, it is necessary to pull the cord along the cornice. It will help align the bottom edges of the sheets if necessary.
Do-it-yourself installation of metal profile sheets on the roof of a private house:
The first fastening of the first sheet is carried out temporarily. Install it in the center near the ridge girder of the roof.
The next sheet is laid and aligned with respect to the first. Its fastening is also carried out temporarily with self-tapping screws.
Important: for fixing, self-tapping screws measuring 4.8 x 19 mm are used; they are installed only on top of the wall at a distance of 50 cm.
After laying 3-4 sheets, they are carefully aligned and only then the final fastening is carried out.
In the ridge part and near the overhang, sheets of metal profiles are attached to parts of the sheathing through the recess of the wave with 4.8×38 mm self-tapping screws (installed in every second wave). From the end part of the sheet, fixation is carried out along the bottom of the sheet into each element of the sheathing. In the center of the metal profile, fastening is carried out in a checkerboard pattern at the rate of 5-9 screws per 1 square meter. m.
Design of the ridge and junctions
In places where the metal profile is longitudinally adjacent to the wall, it is necessary to use a corner strip with an obtuse angle and a shelf width of 150 and 200, self-tapping screws and silicone-based sealant. The corner strip must be laid with an overlap (100-150 mm) in increments of 150 to 300 mm.
In places of transverse connection to the roof wall, it is necessary to use a corner strip with an acute angle (shelf width 150 and 200), construction screws and sealant. As in the first case, a plank is laid with an overlap of 100 to 150 mm with a fastening pitch of 150 to 300 mm.
The design of the ridge of the metal profile is made with an overlap (150-200 mmmm). The first fastening of the skate is made from the side against the wind (typical for this area).
Important: if the north wind prevails in the city, then fastening is carried out from the south.
For fixation, ridge screws with an EPDM gasket are used. If the roof angle is small, then experts recommend using sealing gaskets. But in this case, there must be installed between the sealing gaskets and the ridge. ventilation gap.
Video
Many novice builders are seriously interested in the question: how to properly and competently build a roof from a metal profile with your own hands. By definition, a profile sheet is a plate made from thin metal (its width varies from 0.5 to 1 mm). For the production of metal profiles or corrugated sheets are used steel sheets. The required rigidity is achieved by additional rolling of the profile.
Thus, there is an appropriate height and configuration of sections for the future roof.
What types of profiled sheets are there?
Their surfaces are made to look like waves and are processed using special polymers. In addition to this, the sections are galvanized.
After certain preparatory work metal profile blanks significantly improve their load-bearing characteristics. Now they cope much better than similar roofing materials with significant wind and snow loads. In order for the profile pattern to have good rigidity, additional ribs are used. This is ─ undeniable advantage in cases where slopes with a reduced angle of inclination are installed.
Technologically, laying profiled sheets on the roofs of modern buildings is not particularly complex process. You just need to know the basic techniques, as well as the subtleties of working with the proposed materials.
Before covering the roof with a metal profile, it is advisable to find out more about the materials used and how they are attached differently depending on which installation scheme is used in a given situation.
A priori a metal sheet(metal profile) is found in three varieties:
- brand "C". This type is used to finish the walls;
- profile "H". It has higher strength characteristics, due to which it can be used for roofing;
- type "NS". Fences are built from it, walls are lined with this material, and roofs are protected.
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About the basic advantages of metal profile sheets
Speaking about the main advantages of corrugated sheeting, we can mention:
- small mass (weight ranges from 3 to 20 kg);
- fire resistance;
- environmental cleanliness (the metal profile does not have any harmful effects on human health);
- durability (profile flooring is not afraid of ultraviolet radiation, temperature changes, or acid rain);
- low cost of metal profiles;
- aesthetic appeal;
- high degree of durability and reusability.
At the same time, it is necessary to mention the negatives of this material. Since this raw material has high level noise, then to eliminate this drawback it is necessary to lay a heat-insulating layer of considerable thickness, which, in addition to its main purpose, will play the role of a sound insulator.
If the outer decorative layer is damaged, this can serve as the beginning of the development of corrosion processes. During the installation of metal profile decking, it is necessary to carefully ensure that the inter-joint areas are thoroughly sealed. Otherwise, the finished roof may leak.
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Construction stages
The installation of a metal profile roof begins with the preliminary construction of a good-quality sheathing. This is the load-bearing base on which sections of the flooring will subsequently be attached. After this, the following operations are carried out:
- First, a cord is pulled along the cornice (edge of the sheathing). In the future, it serves as a guide (it is along it that the outer cut of the metal profile sheets is aligned).
- Sections of corrugated sheeting on the roof should be laid starting from the ridge to the lower sectors of the sheathing. In this case, every second wave is attached. The end cut is fixed directly along the profile recess in each horizontal bar.
- In the middle part, the workpieces are screwed to the formwork beams with self-tapping screws in a checkerboard pattern. In order for the fastening to be strong, each “square” of area must be reinforced with 4-5 self-tapping screws.
Metal profile sheets are fixed only in the lower part of the section wave. If a roof with an elongated slope is being installed, then the profile sheets are stacked here on top of each other with a 20-centimeter overlap. In other words, the sheets are “built up”. The overlapping waves are attached to the sheathing at the same time.
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How metal profile coatings are laid
There are two different ways multi-row laying of profile decking:
- Block: blocks of corrugated sheets are formed (4 sheets in each). The newly created segments are the base cells. The future roofing structure is formed from them. The blocks are also mounted with an overlap. This is how the entire roof is assembled. Finished roofs are equipped with drainage grooves.
- In this case, it takes three standard sheet(the finished segment is shaped like a triangle). The elements are built up in the same checkerboard pattern (adjacent waves are also attached “overlapping”). Here, drainage grooves are not needed, because the first row is completely covered by the following sheets.
The final choice of installation method is determined by the angle of the roof. Yes, completely flat roofs(or those where the angle does not exceed 12º) it is necessary to additionally protect the horizontal and vertical joints of sheets of roofing materials silicone sealants. If the angle increases to 14º, the overlap of adjacent sheets should be no shorter than 20 cm. If the slope increases to 16-28º, then the overlap area can be reduced to 15-18 cm. When the roof slope exceeds 30º, the size of the “common” sector is reduced to 10 -15 cm.
A wide variety of materials can be used to protect roofs today. One of the most popular, of course, is metal profiles (corrugated sheets). It is made by cold rolling from high grade steels. If you wish, you can make a roof from a metal profile with your own hands, since one of the undoubted advantages of this material is its ease of installation. Corrugated sheeting can be used for roofs of any size and configuration. Today such roofs can be seen everywhere.
What is corrugated sheeting?
A profiled sheet is a plate of fairly thin metal (from 0.5 to 1 mm), coated with a polymer layer. Its surface is made in the form of waves. The sizes of metal profiles for roofing can be very different. When choosing a type of material, first of all you need to pay attention to the wave height and the thickness of the metal used for its manufacture.
The main advantages of corrugated sheets
The main advantages of metal profiles, in addition to the ease of installation of sheets, include:
Disadvantages of metal profiles
On to the cons of this material The first thing to consider is the noise. However, when using a sufficiently thick thermal insulation layer, which in this case can also be considered as soundproofing, the consequences of such a disadvantage can be reduced to almost zero.
If the outer decorative layer is damaged, corrosion may develop on the sheets. One of the disadvantages is that when installing a roof made of metal profiles, you need to be very careful to ensure that the joints between the elements are sealed as much as possible. Otherwise finished roof will leak.
Types of material
If we talk about the scope of application, there are three types of metal profiles:
- Material grade "C". Is used for finishing walls
- Profiled sheet of grade "N". It has the highest strength characteristics and can be used for roofing.
- Material grade "NS". Can be used for constructing fences, wall cladding, and protecting roofs.
Actually, corrugated sheeting is the cheapest type of metal profile. In addition to this, there is also metal tiles - very aesthetic and practical material. Roofs covered with it look simply magnificent. Thus, corrugated sheeting and metal tiles are the main types of metal profiles for roofing.
The main stages of work when installing this type of roof
Installation of a roof made of metal profiles is carried out in several stages:
- installation of vapor barrier;
- installation thermal insulation material, while most often used mineral wool;
- installation of a waterproofing layer;
- lathing device;
- installation of a drainage system;
- installation of metal profile sheets;
- covering the rafters from the attic side.
In this case, steam, hydro and thermal insulation is installed in the same way as for any other roofing material. The lathing is stuffed taking into account the metal profile.
Installation of a drainage system
Before starting installation of a metal profile roof, it is advisable to arrange drainage system. At the first stage, gutter holders are attached to the sheathing. The edge of the latter should ultimately be located approximately 3 cm below the edge of the future roof. Otherwise, deformations may occur when the snow melts in winter. After the holders are installed, the gutter is inserted into them. Next, it is attached to the sheathing cornice strip. Its installation is carried out so that the edge of the gutter is blocked. You will also need to extend the edge of the waterproofing film over the eaves strip.
Metal profile roof calculation
A do-it-yourself roof made of metal profiles will save money if the necessary calculations are made. In this regard, first of all, the following is taken into account:
- The number of elements in a horizontal row. To do this, first measure the length of the roof slope. Of course, respectively in the horizontal direction. The resulting figure is divided by the width of the sheet. The length of the overlap between the elements is also taken into account.
- To calculate the length of the sheets and the number of rows, you need to add the length of the overlap to the length of the slope (vertically), as well as the length of the overhang of the cornice.
In order to find out how many screws you will need, you need to calculate the area of the future roof and multiply the resulting figure by 6.
Preparation of tools and materials
Before you begin installing the roof, you need to prepare your tools. You should have at hand:
- building level and plumb line;
- metal scissors or jigsaw necessary for cutting sheets;
- electric drill;
- pencil and square;
- screwdriver;
- self-tapping screws
The corrugated sheeting itself must be transported and lifted onto the roof with the utmost care. Otherwise, the protective polymer layer may be damaged.
Installing sheets on slopes
Now let's see how to actually install a metal profile roof with your own hands. Installation of sheets begins from the bottom. They are attached to the sheathing with self-tapping screws at the bottom of the wave. This will ensure reliable installation. The overlap must be made by at least one wave. There should be at least 6-7 self-tapping screws per 1m2 of roofing. The horizontal overlap (between rows) should be about 20 cm.
Pediment cladding
When calculating the material required for cladding the pediment, we take into account exactly how it will be laid. Considered the most economical horizontal method installation In addition, in this case the house will look more aesthetically pleasing. When calculating, it is worth taking into account that about 10-15% of the material is spent on cutting.
For the pediment, wall corrugated sheeting of grade “C” is quite suitable. You can also use “N” and “NS” material. After completing the thermal and waterproofing, a frame is mounted. They will first need to be secured. The corrugated sheet is cut using a hacksaw or jigsaw.
When installing a roof made of metal profiles, you need to be extremely careful in terms of the possibility of damage polymer coating. Otherwise, the service life of the structure will be significantly reduced, since the elements will begin to rust over time. Therefore, it is not recommended to use a grinder for cutting sheets. You should start attaching the cut corrugated sheet to the frame from the bottom corner. All elements are mounted with an overlap.
Ridge installation
The installation of a roof made of metal profiles also includes the installation of a ridge. The junction of the slopes at the top is already closing ready-made element, which can be purchased at the same time as purchasing the sheets. The ridge is made from the same material as the main elements. It is needed to prevent water from getting under the sheets. In this case, laying should begin on the side opposite to the direction of the prevailing winds in this particular area. The ridge elements are mounted with an overlap of 15-20 cm into the ridge in increments of 20-30 cm. Self-tapping screws are also used for fastening.
If the angle of inclination of the roof slope is small, a special seal should be placed under the ridge elements, which can also be purchased at hardware store. There should be a small ventilation gap between it and the ridge.
Installation of the valley
When installing a roof made of metal profiles, it is necessary, among other things, to correctly install the valleys. In this case it is very important good sealing. A valley is a gutter that enters the internal inclined intersections of the slope. It is mounted on a continuous sheathing arranged on both sides.
Horizontally, the elements are connected with an overlap of 10-15 cm. The joints must be treated with sealant. In order for the valley strip to better adhere to the roof, a special self-expanding seal should be used.
At the moment, it seems more than advisable to use such modern material, like a metal profile. In this case, roof installation can be done in short time and without the involvement of professionals. For little money the owners of the house will receive reliable protection his internal space from all adverse environmental factors.
Corrugated sheeting is a fairly popular material that has been used in the construction industry for many decades. It is easy to install, light in weight and at the same time serves for a long time, which attracts craftsmen and novice builders. But many may not know how to properly lay corrugated sheets on the roof. This is quite a responsible process, but nothing is impossible.
The profiled sheet is made of thin metal that is protected from corrosion and coated with various compounds that protect it from exposure to atmospheric conditions. The grooves that are formed on it thanks to cold rolling technology give the sheet increased strength, and therefore resistance to mechanical loads.
Corrugated roofs - photo
Corrugated sheet or corrugated sheet is highly reliable and easy to install; it is ideal for covering roofs various buildings– industrial, warehouse, residential purposes, etc. This is a durable material that can last a very long time if used correctly and was chosen taking into account various features the region where the building is located and operating conditions.
On a note! Corrugated sheeting can also be used for other purposes - cladding the walls of a building, creating fences, and for formwork during foundation construction. But in the above cases, other types of material are usually used - not those used to create the roof.
The material also has a low price, which makes it possible to purchase it even for those who have a limited construction budget. And even the most cheap option corrugated sheeting will clearly please a novice builder with its quality.
Features of choice
The roof structure made of profiled sheets, in general terms, includes several elements. This is the sheathing, heat and waterproofing layers, and the corrugated sheeting itself. And the material, due to its light weight, is excellent for laying on non-reinforced structures. It is suitable for building a roof whose slopes will be at least 12 degrees.
On a note! The slope can be made with a smaller angle, but then all joints between individual sheets of corrugated sheets will have to be additionally sealed.
When choosing corrugated sheeting, you need to pay attention to its thickness, as well as the height of the ridge. The thickness should be at least 0.8 mm, and the height of the corrugation should be from 21 to 25 mm. It is worth stopping at brands such as NS20, NS35 or C44. But for roofs with slopes of only 5-8 degrees, corrugated sheet H75 or H60 is suitable. It is best to choose sheet models with a trapezoidal or wave-shaped corrugation.
Roofing sheet - wave
Advice! The greater the roof slope angle, the “lower” grade of corrugated sheeting is purchased.
By the way, when choosing a material, it is worth remembering that the stronger it is, the smaller step will be at the crate. This means that you need to calculate all cost options and choose the optimal one in specific conditions. After all, you can also save on purchasing materials for lathing. The main thing is that the savings are reasonable.
When calculating the amount of material, the dimensions of the sheets and the need to form overlaps are taken into account. Thus, the length of one profiled sheet can be 12 m, width – up to 1250 mm. When purchasing cladding material small sizes For roofs, it is recommended to buy sheets of such a size that they completely cover part of the slope from top to bottom. Then the number of joints of the covering will be minimal, which means that the roof’s tightness indicators will increase.
Prices for corrugated sheets
Corrugated sheet
Installation rules
During the installation of corrugated sheets, certain rules must be followed, otherwise the roof will be unreliable and will not last long. And these rules apply to all components of the roofing structure. For example, if the rafters are installed in increments of up to 100 cm, then sheathing boards can be used with a section of only 3x10 cm, this will be enough. But if the distance between adjacent rafters is 1 meter or more, then the cross-section of the sheathing bars should be larger. To create it can be used unedged board. But in the place where the valley will be attached, the sheathing should be continuous at a distance of 60 cm on each side from the axis of the valley.
Table. Required sheathing pitch.
| Slope angle value, degrees | Lathing type/step | Thickness of profiled sheet, mm | Material grade |
|---|---|---|---|
| Up to 15 | Solid | 0,5 | C8 |
| 15; more than 15 | Solid; up to 30 cm | 0,5 | C10 |
| 15; more than 15 | Solid; up to 50 cm | 0,5-0,7 | S20 |
| Up to 15; more than 15 | 30 cm; 65 cm | 0,5-0,7 | S21 |
| Up to 15; more than 15 | 50 cm; 1m | 0,5-0,7 | NS35 |
| At least 8 | Up to 3 m | 0,7-0,9 | H60 |
| At least 8 | Up to 4 m | 0,7-0,9 | H75 |
Corrugated sheeting is a material that is created from metal that is prone to corrosion, although protected by certain coatings. Provide under it good ventilation necessary - this will reduce the risk of the formation of large amounts of condensation, which negatively affects the profiled sheets. To create a ventilated space, a counter-lattice is laid - then it will turn out best option the gap between the finishing roofing material and the waterproofing layer.
Prices for various types of construction boards
Construction boards
Attention! Wood is a material that does not like water. It negatively affects it and gradually destroys it, leading to rotting processes. To reduce the risk of their occurrence, it is recommended to impregnate all wood products before installation of the roof. protective compounds.
Installation of corrugated sheeting always begins with the installation of a cornice strip secured to the sheathing using self-tapping screws or nails. Further work on laying the lining carpet and other materials is carried out so that drops of water do not fall on them in the future, but immediately fall off the profiled sheets onto the eaves strip and enter the drainage system.
It is recommended to glue all joints between individual elements of corrugated sheets with sealants and use a special mastic or sealant. Sheets of corrugated sheets can be laid starting from any side of the roof - right or left. But individual elements must be laid overlapping each other. On flat slopes, when using spacers, the overlap can be one wave, and without them, two waves of material. If the roof slope is steep, then the material is laid with an overlap in one wave without the use of spacers.
If the roof is large enough and the length of the sheets is not enough to cover the entire distance from top to bottom (from the ridge to the eaves), then the profiled sheets are laid with an overlap, the width of which is 20 cm. In this case, laying is carried out from the bottom up so that the edge of the bottom sheet overlaps the edge upper
Attention! It is recommended to work on the roof using safety ropes and, preferably, guardrails. It is necessary to move along the laid corrugated sheets in soft shoes, stepping only on the recesses. If the coating of the material has been scratched or damaged in some other way, these areas are additionally treated with protective compounds.
Fastening material
To fasten the profiled sheet, special galvanized fasteners with a hexagonal head are used. These are self-tapping screws 4.8x19 mm. They are screwed from the ridge to the eaves in increments of 50 cm. Along the ridge or on the eaves, screws are screwed into every second corrugation so as to attach the material to the sheathing. For the remaining area of the profiled sheet, 4.8x38 mm self-tapping screws are used, taking into account that there are 4-5 of them per 1 m2 of sheet.
To fasten corrugated sheets, only roofing screws are used, which have special linings made of dense rubber that protect the metal from moisture penetration. The screws must be screwed in tightly, at right angles to the surface.
Methods for multi-row laying of corrugated sheets
If the installation of roofing material involves laying it in several rows, then there are two options for performing this work. In the first case, the first sheet in the bottom row is first laid and the sheet of the second row is immediately mounted next to it. Next, the second element of row 1 and the second element of row 2 are installed. This results in a part of the roof consisting of four sheets. Then, using the same principle, a second block of 4 sheets is mounted, etc. That is, the roof is “sewn up” as if in separate large sheets, consisting of 4 smaller ones. This method is applicable for material that has a drainage groove.
In the second case, the block is assembled from 3 sheets, where two are first fastened together bottom sheets, and the third sheet is already attached to them, which is the first element of row 2. The structure is aligned along the eaves overhang, and it is fastened. This option is suitable for sheets that do not have a drainage groove.
The following tools may be required for installation:
- screwdriver;
- construction level;
- scissors for cutting metal;
- drill;
- roulette;
- gun with sealant.
Contrary to the opinion of inexperienced craftsmen, welding cannot be used to lay corrugated sheets. When exposed to high temperatures, the material will deteriorate. If it is necessary to trim sheets, scissors are used to metal products, and all sections after the procedure are treated with anti-corrosion compounds.
Installation of corrugated sheets and other roofing elements
Creating a roof from this material involves performing the following steps:
- installation of rafter system;
- waterproofing;
- creating sheathing;
- laying insulation;
- creation of counter-lattice;
- laying corrugated board and its fastening;
- fastening additional strips.
On a note! A layer of insulation needs to be laid only if it is planned to create a warm room under the roof. Otherwise, this step may be missed.
Glass wool, polystyrene foam, and mineral wool can be used as insulation. They must be laid very tightly, tightly, so that cold bridges do not form under the roof, allowing cold air to enter the room. The material used is the same thickness as the width of the rafters.
Consolidation waterproofing material It is made using construction staples from a stapler or nails; it is attached directly to the rafters, covering the insulation. It has proven itself well as a waterproofing material. The sheathing is mounted on top of it.
Before the corrugated sheets are laid, a cornice strip is installed. It will protect the ends of the rafters from moisture. The installation of the cornice elements is carried out with an overlap of 10 cm, and fastening with self-tapping screws - in increments of 30 cm. But after laying the profiled material, the ridge strips and end strips are fastened. The first will close the gap remaining for ventilation at the junction of the two slopes. The end strip is also called a wind strip and is installed on the ends of the roof. It is necessary to reduce the wind load experienced by the corrugated sheet.
Advice! It is better to invite an assistant to work with corrugated sheets. It will not only make it easier to lift the material onto the roof, but will also help during installation of the material.
Products made of polyurethane foam act as sealants that are placed between the individual sheets to better connect them. Also, the purpose of using seals is to reduce the noise level that will come from the roof during rain and increase thermal insulation performance. A seal of this type is attached under the sheets to the sheathing. It is recommended to use material that has special perforation.
Video - Installation of corrugated roofing sheets
Fastening corrugated sheets
Step 1. The first sheet is laid on the roof: double-sided tape is glued to the previously decorated cornice. A strip of sealant is glued onto it. If a sealant is used for sheets with a self-adhesive backing, then adhesive tape is not used. The corrugated sheet is laid on the sheathing so that its edge, with a slight indentation, rests on the strip of sealant.
Step 2. The corrugated sheet is fixed using roofing screws. At the edges, screws are screwed in more often than on the rest of the material element. The vertical pitch of the screws is 50-60 cm.
Step 3. The next sheet of corrugated sheeting is laid with an overlap on the previously laid first one. In this case, the sealant is used in the same way. The edge of the sheet with the drainage groove should be at the bottom, under the second sheet. The sheet is screwed in the same way with self-tapping screws.
Step 4. Next, the roof is decorated in the place where there is a pipe. The corrugated sheet is laid around this part of the roof. Only the topmost element does not fit. A sealant is glued to the profiled sheet laid below the pipe level.
Step 5. A layer of sealant is applied to the seal.
Step 6. The junction strip is cut and bent in accordance with the shape of the pipe. Then it is laid close to it so that part of it lies on the seal, and is attached to the pipe with dowels.
Step 7 The strip is attached to the sheet of roofing material using roofing screws.
Step 8 The side strips are fastened in the same way. They are placed on top of the previously installed strip.
Step 9 After installing the bottom and side abutment strips, the roof section above the pipe is decorated. First, seals are glued around the perimeter of the installation of the upper part and on the upper parts of the side strips.
Step 10 According to the shape of the lateral junctions on top bar Bends are made at the junctions. The bar is installed in its place. Its width should not be less than 40 cm.
Step 12 A decorative one is mounted on top of this junction, which is also secured with dowels.
Step 13 Polyurethane sealant is applied along the perimeter of the junction so that it closes the gaps between the strip and the pipe.
Step 14 Using a sealant, the top sheet of corrugated sheeting is installed. It is fixed roofing screws.
Step 16 On the other side of the extension, the valley is installed in the same way, but in the upper part it overlaps the previously installed one.
Step 17 A sealing tape with a width of at least 200 mm and a thickness of at least 10 mm is glued along the edge of the valley.
Step 18 Polyurethane sealant is applied to the surface of the tape.
Step 19 A profiled sheet is laid on the valley with an overlap of 4 cm. It should cover the sealing tape. The material is secured with roofing screws.
Step 20. Installation in progress end strips. The plank is cut to the shape of the roof, one of its edges is bent, as shown in the figure. A sealing tape is glued to the inside edge.
Step 21 The plank is installed in its place and secured with roofing screws from above and from the front side.
Step 22 The ridge strip is being installed. With a slight indentation from the edge, double-sided tape is attached to the profiled sheets. A seal is installed on it and coated with sealant.
Step 23 A ridge element is installed on top, bent accordingly to the shape of the roof.
Correct installation of corrugated sheets on the roof is the key to ensuring that the roof will be reliable and will last long years without leaking. On average, the service life of this type of coating is at least 20 years. But this is provided that all installation rules have been followed.
