Building a roof is a rather complicated process, as it includes many types of work. Some people do not know how to properly install cornice, what is he like. Each installation step is important in value. Indeed, the quality and life of the entire roof structure as a whole depends on the correct execution.
So what is a cornice, and what role does roof construction play? In architecture, it is called a detail of the roofing system , which is installed outside the load-bearing walls. This ensures protection against moisture during precipitation, as well as its penetration into the subroofing gap. In addition to the protective effect, it gives the roof a finished look and thereby emphasizes the individuality of each structure in its own way. We will get acquainted with such an element of the roof as a cornice. What is it, and how is its device carried out - we learn more.
Varieties of cornices
In our time in the world there are many roof overhangs, they are divided into classes and installation methods. On which roofs a cornice is installed, what are roof overhangs, an inexperienced builder will help to understand a small list, which is located below:
- Cornices that do not have a hem are used in the hip-type roofing device. In some cases, you can install on a single-pitched or equilateral roof.
- The hemmed type is mainly used in the construction of hip and gable roof structures.
- The box-like view is considered non-standard, as it is used in the device systems with a single slope and a complex roof.
- A short type assembly can be used in arranging any type of structure.
Also, installation methods can be as follows: flush, open and closed type curtain rod. What is the frontal and lateral overhang - it is imperative to know, as they have some differences, the ignorance of which the installation may be erroneous.
Front overhang
A front cornice is necessary to ensure the protection of the building from the front. It is a structure that is located along the edge of the roof with two slopes. Only gable roof types are available. In the device of a hip or roof with four slopes there are no such cornices, a photo for a better perception is located below.
In order to carry out the installation of the front overhang on the roof with two slopes, it is first necessary to carry out the removal of the crossbars that are mounted on the rafters, outside the structure. Then the installation of the crate and the roofing cake is carried out . Only after this is the front overhang installed on the gable roof system. In some cases, the device runs a little differently. On the crate for vapor barrier, a cornice board is attached, and spotlights are installed on it.
Side overhang of the eaves
The side overhang is installed on each roof of an inclined type. Such a cornice is formed by rafters, which are carried outside the load-bearing walls of the building. This protrusion should correspond to the size of the blind area and be 50-70 centimeters. If the roofing device is carried out by the organization, it offers pre-different cornices, photos of which are available in special booklets.
In most cases, 50 centimeters is the minimum width of the overhang, but in exceptional moments it happens even less.
- In this case, the supporting walls of the building should be well protected from the effects of gusty wind and moisture. This is necessary because when the rain or snow slantes, the walls of the building may get wet.
- Correct the situation with short rafters by installing mares. But this is a complex process, since if the roofing system is already ready, rarely anyone will want to carry out dismantling and make corrections. For this sharp reason, you should carefully approach this issue even in the process of designing the roof structure.
Material for finishing cornice
An important point at the stage when the roof eaves is installed is the choice of material for the skin. Each type of finishing material has both pros and cons:
- Lining - is a good option for filing a cornice. Due to its advantages, it is widely used in construction. This material has an incredibly beautiful texture, the surface is treated with special antiseptics and stain. Installation can be done at an angle and in a horizontal position.
- Decking - is also popular in the decoration of curtain rods. After installation, the design takes on a classic look. Thanks to the variety of shapes and colors, you can realize design ideas.
Features of overhangs
Any type of roof is individual, so even every little thing should be done with a special approach. Here, for example: fixing the cornice differs depending on the choice of material for decoration. Therefore, it should be approached very carefully. If the installation will be carried out on rafters already mounted in advance, the overhang should be located at the same angle.
This installation method can be used for roofs that have an average level of slope. In this case, the finishing elements are simply stuffed on the edges of the rafters. But in order to carry out the installation correctly, it is necessary to make a flat surface of the lower part of the rafters. Only in this case, the binder will fit perfectly to the roof structure.