The ventilation gap is arranged as follows:
Posted: Mon Feb 17, 2025 8:27 am
The blown gap is called ventilation. The movement of outside air in this gap will carry all the steam penetrating to the coating outside. At the same time, it performs two more functions:
In the summer heat, it prevents heat from the chinese thailand data roof covering from penetrating into the attic space (especially important for attics).
In winter, it evenly distributes heat along the slope and thus prevents a situation where, due to melting snow, water forms on one part of the roof, while on the other it freezes and turns into heavy ice and icicles.
Air circulation in the under-roof space is ensured by ventilation gaps on the eaves overhangs, under the ridge and in the dormer windows.
a waterproofing film is spread over the rafters;
a board about 30 mm thick is nailed along each rafter leg on top - a counter-lattice (it will fix the waterproofing film);
The battens are nailed onto the counter-battens across the rafters, and the roofing material is laid on top of them.
Thus, the required gap is obtained between the waterproofing film and the roof covering. Its height will be equal to the sum of the heights of the counter-battens and the sheathing, which is approximately 50 mm.
To ensure the movement of outside air in the ventilation gap, as well as to remove moist air from the attic, various devices are used.
Roof ventilation elements
The main elements of the roof ventilation system include:
Openings under the eaves, which are usually covered with so-called soffit grilles (protection from birds, insects and rodents), as well as along the ridge. These structural elements ensure the under-roof gap is blown through by wind and convection (after heating up under the roof, the air rushes upward).
In the summer heat, it prevents heat from the chinese thailand data roof covering from penetrating into the attic space (especially important for attics).
In winter, it evenly distributes heat along the slope and thus prevents a situation where, due to melting snow, water forms on one part of the roof, while on the other it freezes and turns into heavy ice and icicles.
Air circulation in the under-roof space is ensured by ventilation gaps on the eaves overhangs, under the ridge and in the dormer windows.
a waterproofing film is spread over the rafters;
a board about 30 mm thick is nailed along each rafter leg on top - a counter-lattice (it will fix the waterproofing film);
The battens are nailed onto the counter-battens across the rafters, and the roofing material is laid on top of them.
Thus, the required gap is obtained between the waterproofing film and the roof covering. Its height will be equal to the sum of the heights of the counter-battens and the sheathing, which is approximately 50 mm.
To ensure the movement of outside air in the ventilation gap, as well as to remove moist air from the attic, various devices are used.
Roof ventilation elements
The main elements of the roof ventilation system include:
Openings under the eaves, which are usually covered with so-called soffit grilles (protection from birds, insects and rodents), as well as along the ridge. These structural elements ensure the under-roof gap is blown through by wind and convection (after heating up under the roof, the air rushes upward).