After the completion of the construction of the roof structure and the decking of the roof covering, the moment comes when the filing of the roof eaves can be performed - videos and other instructions for this procedure can be found in large numbers on the Internet. This article will tell you how to perform filing, as well as what types of structures exist and what materials are used.
Hemming the roof eaves, or simply hemming the box, is a very important procedure that ensures the appearance of the whole house as a whole.
The completeness and originality of the appearance of the building will be largely determined by what design, for example, four-pitched hip roof or dwuskat standard roof, and how exactly and with what material the cornice overhangs of the roof are sheathed.
In addition, the importance of filing lies in the fact that the design of the box usually includes elements that provide ventilation for the space under the roof, and it is also here that the drains are fastened.
Device for filing cornice overhangs
Do-it-yourself cornice filing can be done using a variety of materials and designs, but first of all, you should talk about the technology itself and its features.
First of all, it should be mentioned that sheathing the roof cornice with your own hands should be done after the installation of the rafter system is completed, but before the equipment for the roofing sheathing has begun.
In this case, the ends of the rafters are sawn off strictly along one line, which, moreover, must necessarily be parallel to the wall of the building.
Sheathing with boards is most often also done parallel to the walls, therefore, if the width of the cornice box differs at different ends of the wall, the appearance of the house will be significantly damaged.
After sawing off the rafters, the first sheet or board of the crate is laid relative to this line.
Important: before you hem the roof eaves, you should insulate the walls of the building from the outside, which is especially important for the most commonly used boxes, which are sewn not directly along the rafters, but in a horizontal direction.This is due to the fact that if the walls are insulated after the completion of the hemming of the box, either the upper part of the wall will remain completely uninsulated, or the insulation will have to be laid, tearing off the first board from the wall, which will not make the insulation of sufficient quality and cause heat loss during the operation of the house . When performing these works in the correct sequence, the sheathing will simply be brought to the already insulated wall.
The choice of material for filing cornice overhangs
When choosing how to hem the roof eaves, you can consider several options at once, which should be considered in more detail:
- Standard wooden lining, the quality of which should be given special attention, since during operation it will be located on the street, being exposed to various external weather influences. In order to sheathe the roof eaves, you should choose a material that has sufficient thickness, as well as carefully study the humidity of the purchased lining: the material should not be either too wet or too dry. It is best to buy lining, the humidity of which corresponds to the humidity of the environment, which can be achieved by storing it for a long time (at least a month) in an open space.
- Planed edged board, the thickness of which is from 1.5 to 2 centimeters. When stuffing such a board, a gap of 1-1.5 cm should be left, which allows for uniform distribution of air over the entire area of \u200b\u200bthe roof, which ensures good ventilation of the space under the roof, in contrast to the use of lining, when for ventilation every one and a half meters it is necessary to insert special ventilation gratings.
- Roof eaves can also be sheathed with material used in the rest of the house, such as plastic.
The design of the filing of cornice overhangs
When talking about how to make a roof cornice, you should consider in detail the design of the box itself. It is clear that each roof is designed and calculated individually, and the method of filing cornices depends on the specific conditions, but there are certain points common to all methods that are relevant for most roofs being built.
So, the most common are two methods of filing cornices:
- Sheathing the roof eaves directly on the rafters, while the angle of filing is equal to the angle of inclination of the slope, which is the most suitable option for roofs with a small angle of inclination. At the same time, the edged board or lining is stuffed directly onto the rafters parallel to the wall, which requires that the lower part of the rafters is a flat surface.
Useful: if the plane is not even enough, you should level it yourself by fixing the board trimmings with screws on the sides of the rafters, the thickness of which is at least 4 cm and the width is at least 10 cm. First, the first and last boards are attached, after which a thread is pulled between them and the rest of the boards are fastened. To the rafter, located at the convergence of two roof slopes, the boards are attached on both sides.
- The second method is most often used, when a horizontal box is made from the end of the rafters to the wall, and the frame used for filing the material (for example, lining) is made of a fairly thick board, which is attached at one end to the bottom of the rafters, and at the other to the junction walls and rafters. At the point of convergence of the roof slopes, the board is laid flat, forming a joint, on which the ends of both convergent boards are fixed. This joint must exactly pass from the point of convergence of the slopes to the point of convergence of the walls. The resulting design has a sufficiently high reliability, independent of the reliability of the wall itself.
Important: screws can be used to fasten this design, but the greatest reliability is achieved by using corners and metal plates.
After the manufacture of the frame is completed, it is possible to make sheathing with a board or clapboard.
Given that this structure will be subject to various weather influences, such as wind and precipitation, its fastening should also be carried out as reliably as possible, it is recommended to use at least two (three for a wide board) screws at each fastening point to prevent twisting of the boards.
In this case, double joints of boards are not allowed, they should be joined along the length only in a checkerboard pattern, with the exception of the corners where sawing is performed at the required angle, usually 45º.
Useful: the used material should be treated twice on both sides with a special protective agent that has an antiseptic effect and gives the material the desired color: the first time - before it is installed and fastened, the second time - after installation is completed, having processed all the attachment points, cutting etc. In addition, it is recommended to process the boards used for the manufacture of the frame and other wooden roof structures.
The final step when using lining is inserting ventilation gratings into the box, which are not required if edged boards are used due to the gap.
Lattices are recommended to be cut in advance, since in the future it will be problematic due to the lack of scaffolding.
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