Posted on September 8, 2015 by Marcus Dell in Guest Blogs
Sloped roofs over ventilated attics are one of the most common, if not the most common, roof configuration in Canada. This type of roof assembly is typically associated with single family houses but they are also commonly used on townhouse complexes and large architecturally complex multi-unit residential buildings.
I work for RDH Building Engineering in British Columbia, Canada. RDH has investigated hundreds of attics throughout the Lower Mainland of B.C., and mold growth on the underside of the sheathingMaterial, usually plywood or oriented strand board (OSB), but sometimes wooden boards, installed on the exterior of wall studs, rafters, or roof trusses; siding or roofing installed on the sheathing—sometimes over strapping to create a rainscreen.
is a common condition.