Improper House Wrap Installation on New Residential Construction
As a Home Inspector and engineer, I’m continually amazed at what I see when performing construction-phase inspections for my clients. And as a home builder, I can personally attest to the importance of a correctly-installed weather resistant barrier on a house. The building code requires a weather resistant barrier to repel moisture that penetrates behind the exterior wall cladding (i.e. siding, stucco, brick, etc.). The function of the barrier is to protect the wood framing and sheathing from moisture by repelling the water and directing it to the exterior. Without a moisture barrier, water that penetrates behind the exterior cladding causes accelerated deterioration of the wood-framed members and mold growth. The result is deterioration of the house’s structure and the promotion of mold growth, which can be a health issue.
Weather barriers can be accomplished in many ways. The most common is the installation of house wrap over the exterior wood-framed walls. But for the house wrap to function as an effective weather resistant barrier, it must be installed correctly. And so, during a recent construction-phase inspection, I discovered some installation errors with the house wrap. This is a “How not to” video on house wrap installation.