In the construction of any house, the finish line is the covering of the roof. The main thing is that this straight line should lead to a good result without surprises. Therefore, it is very important that the quality of roofing work associated with the installation of corrugated board is on top. The topic of this article reveals the question of how to lay corrugated board on the roof, and what details must be taken into account when choosing and calculating materials.
The choice of roofing material
When it comes to the arrangement of the roof, many have an association: corrugated board - a roof. This is no accident. After all, this material has gained unprecedented popularity in modern construction.
And all thanks to its qualities:
- strength;
- reliability;
- resistance to deformation;
- rigidity and durability.
And yet, when choosing a roofing material, the question arises of which corrugated board is better to use for the roof, so that the roof performs its functions, that is, it protects the house as much as possible from the effects of the external environment.
Suitable for roofing
- Galvanized corrugated board.
- Coated with polymer coating.
Trapezoidal, sine-shaped or rounded material can be installed.
When choosing, you should decide for what purposes the roofing material will be used?
Advice. For temporary construction, you can purchase a less durable material, but for permanent construction it is better to use high-strength profile sheets, that is, it is better to give preference to a profile marked H, with a wave height of more than 20 mm.
If the roof is covered in an industrial building, uncoated profiled material can be used. In this case, the aesthetic appearance is relegated to the background.
Roofing material with a polymer coating pleases with a variety of colors. Therefore, it is more appropriate to use it in residential construction. In addition, the additional coating significantly increases the resistance of the material to corrosion.
Taking into account the fact that the profile sheet must comply with the technical specifications or the state standard, purchase such material for which the seller has a quality certificate. When choosing, also pay attention to appearance.
The ideal surface of the sheets will protect the roof from external factors, and the material itself from aging.
Calculation of roofing material
It would seem that when the corrugated board is selected, and there are the necessary tools for laying it, you can proceed with the purchase and, directly, installation.
But in order to perform roofing work at the highest level, it is necessary to make the correct calculation of the corrugated board on the roof.
The calculation of roofing material is best carried out taking into account a wooden or metal structure, battens. The step of supports for profile sheets can be 50 cm.
The step is determined by the thickness of the profile, height, as well as the slope of the roof and the expected load.
Usually, when calculating the length of the sheets, the distance from the roof ridge to the eaves is taken with the addition of about 4 cm.
Advice. For the convenience of transporting and laying profile sheets, it is undesirable to use sheets longer than six meters.
After the length is calculated, we again return to the question of how to calculate the corrugated board for the roof, that is, its exact amount?
For this it is used:
- useful sheet width;
- installation width (including overlaps).
The number of roofing sheets is calculated by measuring the length of the eaves and dividing it by the installation width of the profile sheet.
In the event that it is necessary to calculate materials for a roof with a complex configuration, it is necessary to carry out a mathematical calculation of the area of \u200b\u200belements with drawing up a roof drawing. Correct calculation of materials will lead to minimization of their waste.
Exact adjustment is carried out when the corrugated roof device passes directly.Based on the fact that roofs differ in shape, size, and the presence of additional elements (pipes, windows), it is necessary to take into account all important details when calculating the roof.
Installation of roofing material
Despite the fact that corrugated board has become an affordable and popular solution for roofing, not everyone knows what nuances the installation of corrugated roof contains.
If we consider this process as a whole, then it can be divided into several stages:
- transportation;
- unloading work;
- lifting material to the roof;
- laying corrugated board.
First of all, it must be taken into account that the delivery of profile sheets to the construction site must be carried out with care. Scratches formed on the surface of the sheets can lead to the spread of corrosive processes.
This fact must also be taken into account at all stages of the arrangement of the roof from corrugated board.
Moving sheets to the roof also requires accuracy. You can raise them with the help of logs installed from the ground to the edge of the roof. Lifting is carried out on one sheet.
Attention. It is not necessary to carry out the movement of sheets in windy weather conditions.
Strong winds can cause damage to the roofing sheets during the lifting process, which is carried out twice:
- for carrying out control measurements;
- for the final fixing of the sheets on the roof.
Technological process of installation
The technology of covering the roof with corrugated board provides for the beginning of installation from the lower edge of the roof.
It is necessary to leave an overhang of the material above the walls, which must be at least 50 cm. The sheets are overlapped.
The overlap of the sheets between each other is 150 mm. During installation, the ridge is arranged in such a way that its design contributes to roof ventilation.
The fastening of the corrugated board to the crate is carried out using nails with washers.
Advice. But screws with rubber seals double the strength of the roof.
During installation work, it is necessary to follow the rules for moving along profiled sheets:
- soft shoes should be worn on the feet;
- it is necessary to step into the waves of sheets (a crate is located under them).
When installing sheets, alternate laying occurs. It is necessary to lay the first sheet in its place and secure it in the upper part with one nail or screw. Then the second, the third and so on.
After the entire row is laid, it is necessary to align it with the eaves. And then attach the sheets to the crate. The next row is laid in the same way.
If it is necessary to cut profiled sheets during installation, it is allowed to use a circular saw, hand or electric shears, a hacksaw with fine teeth. The use of a grinder is not recommended.
To prevent corrosion processes, it is desirable to treat the attachment points and the edges of the cuts of the sheets with enamel, which is intended for surfaces with a polymer coating.
The slope of the roof affects the correct installation. Provided that the angle is less than 14 degrees, the overlap of the profiled sheets along the horizontal line should be more than 20 cm.
By increasing the slope to 30 degrees, the overlap can be reduced to 15 cm. Exceeding the 30 degree slope mark allows the use of allowable overlap values of 10 cm.
If the installation of corrugated board is carried out on a flat roof, then sealing of horizontal and vertical overlaps is required. For this, silicone sealant is used.
ventilated space
It is necessary when arranging the roof not to forget about the ventilation gap.
The need for ventilation under the roof depends on such factors:
- the presence of temperature differences from the outer and inner sides of the roof structure;
- the thickness of the waterproofing and heat-insulating layer;
- tightness of the roof base.
If during the arrangement of the roof there was a need for ventilation, then special rails should be installed for its installation. The method of their location near the eaves should facilitate the free entry of air under the profiled sheets.
Ventilation is not affected by the thickness of the crate. In principle, it depends on the height of the profiled sheets and the length of the fasteners. The step of the crate depends on the angle of the roof.
Do not forget that corrugated roofing will meet all the requirements of high-quality roofing materials if its installation is carried out in compliance with the appropriate tools, technologies and a careful approach at all stages of roofing.
Did the article help you?