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Rainscreen cladding principle Air circulating scheme. A rainscreen is an exterior wall detail where the siding (wall cladding) stands off from the moisture-resistant surface of an air/water barrier applied to the sheathing to create a capillary break and to allow drainage and evaporation.
As exterior walls, shoji diffuse sunlight into the house; as interior partitions between rooms, they allow natural light deep into the interior. While shoji block wind, they do allow air to diffuse through, [ 9 ] important when buildings were heated with charcoal . [ 5 ]
Drainage walls allow water that leaks into the wall to drain out such as cavity walls. Drainage walls may also be ventilated to aid drying such as rainscreen and pressure equalization wall systems. Sealed-surface walls do not allow any water penetration at the exterior surface of the siding material.
Between the cladding and the wall there is a cavity where rain can run down. In the event of a fire this draws hot air up like a chimney, intensifies the fire, and spreads it to the top of the clad area. The fire can then get inside the building through open windows, for example to curtains blowing through windows. [1]
Fire walls provide varying resistance to the spread of fire, (e.g., one, two, three or four hours). Firewalls can also act as smoke barriers when constructed vertically from slab to roof deck and horizontally from an exterior wall to exterior wall subdividing a building into sections.
A screened porch on the rear of a house in the southwestern United States. A screened porch, also known as a screen room, is a type of porch or similar structure on or near the exterior of a house that has been covered by window screens in order to hinder insects, debris, and other undesirable objects from entering the area inside the screen.
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