Gable roof: rafter system for corrugated board, photo, drawing. Calculation, installation by own hands of a rafter system of a gable roof. Distance between rafters of a gable roof under a corrugated board

The roofs of modern private houses can have different configurations. The most popular type of roofing is gable. Unconditional advantages of such a roof, the owners of suburban areas consider reliability, rather attractive appearance and economy. The construction at the roof of this type is extremely simple, and therefore it will not be difficult to erect it even with your own hands.

Lightweight and durable sheet materials - this is what most often covers a gable roof. Profiled, for example, for this design is just perfect. The roof of this variety protects well the interior of the house, it serves a long time and is inexpensive. Of course, the procedure for erecting the roofing system under the corrugated board, as well as for any other material, has some peculiarities.

Where to begin

How is the gable roof assembled? The roofing system under the corrugated board will turn out to be reliable, and the roof itself is neat only if a detailed design is prepared in advance. When developing the latter, you need:

• Calculate the load on the roof;

• Determine the angle of slope of the rays;

• Determine the type of materials required for construction;

• To calculate the step between the rafters and the elements of the crate;

• Make detailed drawings of the framework showing the way to connect all nodes.

If all these operations are carried out without errors - in the end you will get a strong gable roof. The roofing system under the corrugated board, the drawing of which can be made using, for example, special software on the computer, will last as long as possible.

Load calculation

This step in drafting the roof can not be missed in any case. Correctly executed calculations - a pledge that in the end you will get a durable gable roof. The roofing system under the profiled sheeting (the photo of the assembly of such a frame can be seen below) is mounted taking into account the following parameters:

• Weight of all used for the erection of the roof, materials;

• Possible snow and wind load.

The values of the last two indicators can be learned from special tables developed specifically for each specific region.

All figures obtained as a result of calculations must be added and multiplied by the reliability factor in 1.1. Having calculated the roof gable roof system in this way, it will be possible first of all to determine the type of materials required for assembly. Also, taking into account the final load index, the optimum angle of support of the roof frame is selected.

Angle of slope

In addition to the load, the choice of this indicator should also take into account the features of the roofing material itself. The angle of inclination of the roof slopes from the corrugated board can be any, but not less than 12 degrees. If you make the roof more shallow, in the future it will flow. At the same time, the sheets themselves begin to sag under the weight of the snow in winter. That is, the roof will have to be constantly repaired. And this, of course, additional costs.

In the central part of Russia, taking into account wind and snow loads, it is almost universally allowed to erect roofs with a slope angle of 30-45 degrees. This option is ideal for corrugated board. In the southern regions, the angle of slope of the skates of the roofs of houses may be smaller, and in the northern, on the contrary, larger.

Among other things, when choosing the method of installation, the rafters should also take into account the way in which the loft will be used in the future. If it is supposed to be insulated and arranged for a dwelling, skates should be made more abruptly. But of course, in this case, the erection of the roof will cost a little more, as it will have to use more materials.

Of what to build

From what concrete materials can such a gable roof be built? A rafter system, the installation of which by your own hands - in any case, a responsible one, must, of course, be as reliable as possible. But one of the advantages of corrugated board is that it has a low weight. Therefore, it is not necessary to use any special, very strong materials for assembling the frame under it. For rafters such a roof is quite suitable for a standard beam of 150x100 mm. Lumber of a larger cross-section is advisable to use only if the attic is to be used as a dwelling. Rafters for such a roof are usually made of a bar 200 x 100 mm.

The lining can be assembled from the edging board 30x100-150 mm. Too much sawn timber in this case can not be used. Such boards after a while will simply dry up and strongly disintegrate, which will negatively affect the reliability of the roof. Under the Mauerlat it is better to take a thicker bar - 200x150 mm.

The step between the elements of the construction

Too often, frame supports for light metal sheets are also optional. The optimal distance between the rafters of the gable roof under the corrugated board is 60-80 cm. As for the battens, the step between its elements is chosen taking into account the variety of the sheets used. So, for a thick material 0.6-0.7 mm with a profile height of 3.5 cm, boards can be packed at a distance of up to 1.5 m from each other.

For the standard H-grade corrugated board, the step of the battens is usually 60-70 cm. The same distance is suitable for the material HH. A thin sheet C is mounted on a crate packed with a pitch of 10 cm or on a pile of solid 12 mm plywood or OSB sheets.

How is the gable roof. Roofing system

Mounted the roof frame of the house in a few steps:

• Mauerlat is installed;

• Rafters are mounted;

• If necessary, a heater is installed;

• Rafters are covered with waterproofing;

• The crate is stuffed.

Mounting the Mauerlat

Begin to assemble a structure such as a gable roof made of corrugated board, with their own hands from the installation of this particular element. Mounted Mauerlat on top of the building box. As a basis for the rafter system, this element is used only on brick, solid or block walls. In the paved and chopped, his role is played by the upper crown. Fasten the timber to the walls with the use of anchor bolts. You can also use steel nails, galvanized wire with a thickness of 5 mm or staples.

Methods of fastening the rafters

The supporting elements of the roof can be attached to the Mauerlate in two ways. For brick, block and monolithic houses, the technology of rigid fixation is used. In this case, the rafter legs are attached to the Mauerlat with galvanized steel corners and self-tapping screws or a "knot" of three nails (one in the upper plane, two at the sides).

On the chopped and paved walls the rafters are attached with a sliding method. The fact is that such houses in the first time after erection give a strong shrinkage. Therefore, the rigidly fixed roof frame in the future can simply lead. When the sliding method of installing the rafters, special fixing elements are used, "slides", which ensure mobility of supports in a small range.

How to install

Mount the supporting elements of the skeleton correctly. In this case, you get a neat symmetrical gable roof. The rafter system for profiled sheeting, as well as for any other material, should be assembled using a template. In this case, all legs will have the same length. For gable roofs from profiled sheeting can use both simple straight rafters (with a corner cut off at an appropriate angle), and a variant with landing nests under the Mauerlat. Between the above, the frame supports are usually fastened with special thick steel plates.

The first farms are always established first. Further, between the highest points of the cord stretches. Then, orienting on it, establish intermediate farms. On the large roofs between the two pairs of rafters pre-mounted ridge run on the supports. The latter are securely fixed to the beams of the floor.

Installation of insulation and waterproofing

If the attic is supposed to be made residential, when the roof is erected, of course, it will have to be insulated. On the roofs of corrugated board for this purpose is most often used mineral wool. As a support under it from the attic to the rafters wire is stretched. The mats themselves are installed by the enemy.

The waterproofing on the rafters is sewn with a slight sag (2 cm). You can not tighten the film very much. Otherwise, with the movements of the frame, it can simply tear. Produce the installation of strips of the waterproofing horizontally from the bottom upwards with an overlap of not less than 10-15 cm.

Edging of the battens

Support boards under the sheets of corrugated board to the rafters are attached by means of nails with a diameter of about 3-3.5 mm. The length of fasteners in this case must be twice the thickness of the fixed elements themselves. The assembly starts from the eaves. Mount the boards should be to each rafter for two nails. The last two rows of the skate are packed without a gap.

After the crate has been assembled, it is possible to proceed to the carcass plating by the actual corrugated board. At the final stage, the roof gable roofs are upholstered.

What you need to know about

Wood - the material is very easy to process and yet strong enough. That is why the gable roof system with its own hands is collected most often from the timber and board. However, for a very long time the lumber can not boast, unfortunately, can not. Sooner or later, the roofing of the building begins to crack or rot. Therefore, before assembling it, the beam and boards must be treated with special compounds that increase their moisture resistance.

Another disadvantage of wood is flammability. To reduce the risk of fire to a minimum, used for the construction of the frame of the building lumber should, among other things, carefully treated with a means to increase their fire resistance.

This is the way the gable roof is assembled. The rafters under the corrugated board, as you can see, are mounted simply. Nevertheless, the installation of the roof frame is very responsible. If any technologies are violated, the owners of the house will subsequently have problems with leaks, the need to replace individual elements, etc. Therefore, it is the maximum responsibility to approach the assembly of the roof truss system.