As sources of illumination of the attic floor, traditional windows can be used, located vertically and specially designed for these purposes, the so-called attic windows, which are installed in the plane of the roof (with a slope of 15-90 degrees).
In one attic floor, both attic and ordinary vertical windows can be used simultaneously, if this helps to strengthen the plastic of the building facade and complete its architectural solution.
It is recommended to follow the following basic approaches when choosing windows for attic rooms:
The calculation of the size and placement of the window must meet the visual and anthropometric characteristics, according to which the top of the window opening must be at least 1 9-2 0 meters from the floor, and the visual beam of a seated person must have a viewing sector of at least 15 degrees with the window open
Special flashing allows you to combine skylights into groups
Features of roof windows
Light from the roof window spreads evenly throughout the room, while there are no blind side compartments that obscure the light. Skylights let in the right amount of light with a smaller opening area compared to traditional windows. The norms establish the minimum ratio of the light area of dormers to the floor area of all living rooms and kitchens in apartments and dormitories of the attic floors, equal to 1:10.
Roof windows provide complete protection from external influences. They are adapted to the most extreme weather conditions and are successfully used in all climatic zones. Energy-saving double-glazed windows are used for protection from the cold. The use of glasses with a low K coefficient improves the insulating properties of the window and largely prevents condensation of water vapor on the inside in a room with high humidity. Sun protection helps to create a comfortable environment in hot weather. The opening system of roof windows depends on the suspension of the sash to the frame.
The most common is the suspension along the middle axis, around which the window is rotated when opened. The handle can be located at the bottom or at the top. A window with combined opening has been developed, in this case it can be opened outward from bottom to top using the handle located at the bottom of the window.
Marquiset is the most effective means of protection from the hot sun
To ventilate the room, the opening system allows you to fix the window in several positions. And to ensure natural ventilation with a fully closed window, a special ventilation device is built into the window block box.
Skylights are safe in operation, since tempered glass with increased strength to mechanical stress is installed in glass units.
In the manufacture of a glass unit, it is possible to install shockproof, absorption or reflex glass.
Wooden elements of the window (glued pine wood, treated in a special way) are protected from the outside from external influences by aluminum profiles (flashing) with a polyester coating, resistant to environmental influences.
For copper roofs, special copper frames have been developed. The cover is practically invisible on the roof, since its top and sides are covered with roofing material.Almost all manufacturers of roof windows have developed several options for coverings for various types of roofing materials – flat, profiled, etc. The covers perform not only a protective function for wooden elements, but also drain rainwater from the surface of the window Special flashing allows you to combine skylights into groups of horizontal, vertical, combined.
A wide range of accessories has been developed for roof windows:
Lighting of the attic floor with roof windows in combination with vertical
At the end of the brief description of the features of dormer windows, it is necessary to dwell on one more important point – the correct internal sealing of window slopes. The slope above the window must be performed horizontally, and under the window – vertically.This will provide the necessary circulation of warm air (heating devices should always be located under the window), which will avoid condensation of water vapor on the window glass. If it is necessary to install a window sill, it is advisable to install it with some distance from the walls, leaving an air gap, and also providing for the possibility of full axial rotation of the window frame.
On the Russian market, roof windows are represented by the following trademarks (in alphabetical order): FAKRO (Poland), ROTO (Germany), VELUX (Denmark), ZENITH (Italy).