(1) Any object (such as vent pipes, electrical conduit, ducts, structural supports elements, etc.) passing through a roof, wall, floor or other building assembly. (2) Any hole or opening in a building assembly which would allow the passage of air, water or other fluids.

SPFA believes that the path to a healthful, safe, high-quality and performing SPF installation travels through the hands of a knowledgeable, trained, experienced, and ideally PCP-certified professional contractor.