How do I properly use Azek sheet goods as exterior trim?
Three years ago I had my 90 year old house redone. Recently we discovered a leaking door in an addition that was built onto the house. The addition was timber framed 16" on center using 1/2 inch exterior grade plywood as sheathing. 6 inches of spray foam insulation was used on all exterior walls the interior was finished with 1/2" drywall. Exterior walls were wrapped with Tyvek and 3/8" Azek was nailed to the sheathing seams were glued and perimiter was caulked. When we removed the Azek to repair the leak we found black mold on the interior surface of some of the Tyvek, we also found black mold on some of the sheathing and patches of rotted plywood under the Tyvek. Is this wall system properly designed? Can the sheathing properly handle the high humidity levels I encounter where I live?
Posted Jun 11, 2014 6:55 PM ET
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