Recently, builders are increasingly choosing corrugated board in the role of roofing material. Under it, it is important to equip a strong and reliable crate, which will guarantee the longevity of the roof. But it depends on how much it will be warm and comfortable in the house on the coldest days. After completion of work, you will receive a system that will protect the building from the effects of fungi, bacteria, as well as external negative factors, keeping the building in its original form for a long time. This material is very easy to install, which is why private craftsmen carry out all the manipulations on their own, refusing expensive professional assistance. Having studied the technology, you can evaluate your strength.
Before work
Installation of corrugated board, as practice shows, is a fairly simple task. However, it is important to comply with standards and technologies. Before laying this material, it is necessary to correctly install the beams, install the rafter system and the frame structure. Metal or wooden elements are laid on the base, which extend 0.5 meters beyond the walls. As the basis for the roof, a rafter system should be used, which has vertical racks, inclined struts and legs on inclined rafters.
Specialist recommendations
The device of the roof from a profiled sheet on a wooden crate requires the installation of rafters, the distance between which can vary from 60 to 80 centimeters. It is important to consider the load on the elements at a certain angle. To make rafters, dry coniferous wood should be used, which will avoid deformation of the entire structure.
In those places where the volume of falling snow is increased, the angle of the rafters should be from 35 to 45 degrees. In those areas where moderate weather conditions, you should make an angle of 20 degrees. The device of the roof from a profiled sheet on a wooden crate provides for the creation of a special design that will act as a frame for covering material. To do this, use wooden bars.
Varieties of crate
If we are talking about industrial buildings, then in this case, metal frames are most often used. In the construction of private houses, a wooden crate is used, the elements of which are treated with an antiseptic. To do this, use boards with a cross section of 25-30x100 mm. The frame system must be installed after laying the waterproofing layer. It will absorb moisture from the side of the insulation and prevent the penetration of condensate, which forms on the lower surface of the roofing sheet due to temperature fluctuations.
Crate Classification
The device of the roof from a profiled sheet on a wooden lathing may involve the installation of elements with the usual step, for this a distance between 20 and 40 centimeters is maintained between the bars or boards. This type of design is most often used in tandem with corrugated board. The crate is also continuous, the gap between the boards in this case is 10 millimeters in order to exclude damage due to swelling or drying of the boards. Sometimes plywood or waterproof chipboard is used for this. The sparse crate is equipped with a step between the elements in the range from 50 to 75 cm.
Guidelines for choosing a frame system
The device of the roof from the profiled sheet on the wooden crate can be carried out only after you choose a type of frame. It will depend on the brand of covering material used, as well as the angle of the roof. For example, if the angle is 15 degrees, then a solid crate should be used for C10 grade flooring. Whereas C21 decking requires an ordinary crate, the distance between the elements of which is 300 millimeters. If you purchased material C44, then you will need to equip a sparse crate with a distance between the bars of which varies from 500 to 1000 millimeters.
Roofing can be performed on a two-layer crate, which is required to ensure high strength of the roof and impressive loads on it. In the bottom row, a sparse installation of the components is performed, while in the top row the system can be continuous or have a normal step. The lower row is formed parallel to the ridge, and the upper should be perpendicular to this component of the structure.
A special case
A two-layer frame system is necessary when laying thick thermal insulation, the thickness of which can reach 100 millimeters. In this case, two bars are strengthened across the rafters, the size of each of which is 50x50 millimeters. The installation of the roof during the formation of the usual crate involves the use of a wooden beam, the cross section of which can vary from 50x50 to 75x75 millimeters. An ordinary frame is sometimes made of a board whose width does not exceed 150 millimeters. Whereas the thickness can be equal to 20-50 millimeters. In this case, it is very important to limit the width of the board to 15 centimeters, otherwise the wood will deform due to dampness and temperature changes.
Fasteners
The roof lathing can be fixed with nails or self-tapping screws. The length of the fastener should be equal to the double thickness of the crate. If a square beam with a side of 50 millimeters is used, then the fasteners should have a length of 100 millimeters. Frame elements are fixed to each roof rafter. Boards and timber should not have defects and protruding knots.
The technology of installing the frame system on the rafter roof
If the rafter roof will be covered with corrugated board, then outside it is necessary to mark the location of the boards and beams. This is done on the most extreme rafters. Throughout the ramp, you need to measure the fixation points of the timber or board. If a protrusion into the recess is found at the location, then it is necessary to get rid of them by shrinking the material or stuffing rails. You can use roofing material for this.
The crate is stacked from the ridge. The distance between the elements should be from 20 to 40 centimeters. Wooden boards are fused in length, since the standard length of lumber is shorter than the length of the ramp. To do this, the edges of the pieces must be fixed with nails, and then installed on the roof so that the beam joins the rafters. In each horizontal row, the joints should be offset. To do this, the boards are cut to the desired length.
At the ends of the roof, wind boards must be mounted; their height is greater than the crate by an amount that is equivalent to the height of the covering material profile. When the rafters and lathing are ready, you can proceed to installing the profiled sheet, which is strengthened by self-tapping screws, their top coating should be made of zinc. Rubber washers can be used as gaskets. 5 fasteners are needed per square meter of covering material. Between themselves, the corrugated board is connected using rivets.
The nuances of the work
Having determined the size of the roof, you can calculate how much material will be needed to carry out the work. When you visit the store you will find out that the sheets have a useful and full width. Depending on these figures, it will be possible to make calculations. To begin with, the roof area is determined, and then the usable area of one sheet. Then the first value must be divided into the second, this will allow you to understand how much you need to acquire material. When buying, you must remember that a large profile height will be able to provide the surface with the ability to undergo heavy loads. If we are talking about a private house, then it is best to use a professional flooring of 35 millimeters, its thickness in this case should be approximately 0.6-0.7 millimeters. Roofing with corrugated board of a lower profile height is carried out taking into account the installation of the crate, between the elements of which a smaller step should be provided. This will allow for greater rigidity and high structural strength.
If different parapets and chimneys pass through the roof, a separate crate should be installed under them. For a chimney, it is located with a retreat of 15 centimeters. Do not start work in the rain, as the boards may get wet, which will lead to their deformation when dry.
Fixing corrugated board
Profiled sheet for the roof begin to install from the lower corner of one of the ends. If you have to mount several rows, then the material is installed in the bottom row with some overhang of the strip from the cornice, which is about 40 millimeters. The sheet is fixed to the last plank at the edge of the roof at the bottom of every second wave. On the sides of the building, the end boards are sewn up with wind corners, this will be done after the entire end row has been fixed. The overlap of the sheets should assume a vertical overlap of 200 millimeters. In the horizontal, the top sheet goes to the bottom at the wavelength. This is true when using seal gaskets. If you decide to carry out work without it, then the horizontal approach should be two wavelengths.
The roofing sheet must be strengthened by a certain technology. As soon as the main canvas can be fixed, you can proceed with the installation of the ridge and end plates. In the first case, the elements are not compacted, and gaps should be left in the profile relief, which will provide ventilation of the under-roof space. As the final stage, the device adjoins the walls of buildings, which are located in the neighborhood.
Cost
A professional sheet, the price of which is reasonably reasonable, is considered to be common material today. For a square meter of profiled sheet C21 you will have to pay 174 rubles., While the thickness will be 0.4 millimeters. C10 decking costs 154 rubles. per square meter, the thickness remains the same. It is important to remember about consumables, for example, a roofing screw will cost 2 rubles. a piece. If you decide to use a professional sheet for roofing, the price of this material should interest you. Upon learning it, you can make a comparison with the cost of other materials. Sometimes this allows you to make the right choice.