The Type W may be used to provide the balanced air conditions demanded within the cavity in Timber-frame construction.The equivalent airflow of an open perp is required every 1.5 metres around the base of the cavity Walls and around the top of the same walls. Where such wall cavities are closed or compartmented with the presence of horizontal fire stops or similar,ventilation apertures are required below and above such stops. Type W cavivents are designed for such purposes.Type W cavivents are available in a range of colours to blend with the adjacent mortar or masonry. To the front of each Type W is an insect resistant grille,whilst within the body of the ventilator are baffles to diffuse the effects of directly-blowing winds.Type W cavivents may be used to satisfy the requirements of cavity ventilation.
Specification Details for Type W - Air Bricks & Cavity Ventilation (Air Bricks & Cavity Ventilation)
Please note that these product properties are not a replacement for the manufacturer's literature and it is always recommended that Cavity Trays is consulted before specifying.
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