Attic ventilation provides heat transfer. In the hot season, an unventilated attic heats up and heats the house, and in winter condensation accumulates here, freezing and shortening the life of wooden rafters.
Cold Attic Ventilation Equipment
The cold attic ventilation system must certainly be controlled. The roof rafters and the lathing are not covered. You can sew them at intervals through which air will pass. A roof covered with slate or ondulin (without vapor barrier) perfectly passes air masses. Since the metal tile accumulates condensation on itself, it is imperative to lay a vapor barrier under it.
For ventilation of the attic, ventilation ducts are mounted on the roof. With a gable design, the canals are equipped in the gables.
A very good result of ventilation of a cold attic in a private house is the sewing of overhangs with gaps. The presence of thin slots around the entire perimeter of the roof allows air to freely pass through the attic. But if the sewing is done without gaps or stone gables, before you make ventilation in the attic, you will need to drill holes in the walls. So that the movement of air covers the entire volume of the attic, they are done in opposite walls.
The area of the holes should be 0.2 percent of the attic area.
There are special ventilation grilles that are easy to install. You need to install two grilles, one of which must be blocked by a damper. To prevent flies and mosquitoes from flying into the room, after ventilation is done in the attic, nets are put on the grates.
Attic ventilation with different roofs
The attics of the hip roofs are ventilated according to a special scheme. An inlet is made in the roof lining. The weekend is equipped at the skate itself. Wooden filing of such a roof is done with gaps of a couple of millimeters. If plastic binder is planned, perforated, called spotlights, are inserted among the solid plates.
For the roof of the flexible tiles are made special valves called "turtle". You can also resort to a ventilated ridge. A standard ridge is mounted on the roofs of the euro-slate and ordinary slate. And on the roofs of tiles, a valve of a special design is installed. Installation of the ridge is much cheaper than a special valve and the work takes much less time.
In some cases, attic ventilation in a private house is done through dormers.
They can be closed with glasses or nets. However, for the competent arrangement of this type of attic ventilation in a private house, special knowledge and skills are needed.
