Many designers and specifiers understand controlling air, vapor, and thermal transfer helps mitigate moisture problems within the building envelope. Moisture accumulation is a performance adversary that can lead to structural deterioration, finish damage, organic growth, and reduced building longevity. However, navigating the fundamentals, code requirements, and industry trends can be complex.
Guidelines for detailing and testing air and water barriers (AWB) with cladding attachments are limited, and installation practices are not consistent across projects. Each of these penetrations have their own unique attachment method, with varying potential effects on air and water tightness and the building’s overall thermal performance. However, the impact these cladding attachments may have on the effectiveness of the AWB can easily be overlooked.
Waterproofing is the art and science of minimizing the potential for water ingress into a structure by treating surfaces to resist the passage of water under hydrostatic pressure. While it sounds similar, waterproofing is different from dampproofing, which is defined as treatment of a surface or structure to resist the passage of water in the absence of hydrostatic pressure.