Snow retention on the roof - the meaning of this action
Snow retention on the roof provides a gradual and uniform snowfall in small portions that are not able to damage the roof and gutters, and when collapsing do not pose a serious threat to people and their property. After installation, you need to periodically check their status.
An anti-skid fence is mounted with self-tapping screws with rubber gaskets on the roof immediately above the load-bearing wall or slightly higher to the crate directly through the roofing. The steeper the angle of the roof, the more reliable these barriers should be installed.
Snow builders are usually installed in staggered order, and sometimes in a straight line. On skates longer than 5.5 m, it is recommended to equip several rows with an interval between them from two to three meters. The type and scheme of installation of such structures depends not only on the length of the roof, but also on its type, but more on this later.
Snow covers for roofs - types of structures
On the roofing market, safety features are represented by network , tubular and plate snow holders. The first category includes products in the form of a grid on a rigid metal frame. They are installed on tiled roofs or on high-rise buildings to prevent ice and snow from escaping. Their length is up to 2.5 meters, width - 0.15 meters. Usually mounted in a row with small intervals.
Tubular anti-dump systems consist of galvanized steel pipes of oval shape, additionally covered with a layer of polymer. They are used for rebated and tiled roofs, as well as for roofs with a coating of corrugated board. Unlike network protection systems, tubular snow holders do not hold up the entire snow mass on the roof, but provide it with small parts. They are mounted in one or more rows or in staggered order. For installation, the distance from the eaves should not exceed one meter.
The lamellar roof safety systems are made from the same material as the metal, and outwardly they look like a non-profiled metal sheet bent in a certain way. In its uncomplicated form, they provide reliable protection and are mainly installed on roofs with a slope of not more than 30 degrees.
The installation of this or that type of snegozadderzhatelya due to the individual features of the roof. This takes into account the type of roofing, the height of the building and the angle of slope of the ramp.
Snow covers for folded and soft roofs - features of the
snow cover holders are a tubular roof and consist of two pipe sections inserted into sheet metal support brackets. From other protective structures of this class, they differ only in that their supports are additionally equipped with special clips for folds, by means of which tubular anti-dump systems are attached to the roof without violating the integrity of the coating.
Snow retention on the soft roof has its own specifics. Building standards established that the angle of the slope of the roof with a soft roof can not exceed 15 degrees. With such a small angle, an avalanche-like collapse of snow is unlikely, and, therefore, no need for powerful protective devices.
In addition, the surface of such coatings is always rough, which also hinders the accelerated descent of snow. And, finally, under this covering, there is a rigid solid foundation on the whole area, to which snow holders for soft roofing should be attached practically without restrictions.
In view of the above, as a protective structure on soft roofs, it is possible to install point snow arresters-stoppers, placing them in the lower part of the ramp in staggered order. Snegostopory are strips of galvanized steel, curved in the form of triangles.
