Where are pressure boundary issues often found in a building?

Pressure boundary issues are commonly identified at penetrations and material junctions within a building's envelope. This is because these areas create opportunities for air leaks and energy loss due to the different materials and transitions involved. When a building's exterior is not properly sealed at points where various building components meet, such as around windows, doors, plumbing vents, electrical ducts, and roof-to-wall connections, these junctions can disrupt the flow of air, moisture, and temperature control.

Proper sealing and insulation at these penetrations and junctions are crucial for maintaining the integrity of the air barrier and ensuring the building operates efficiently. Failure to address these areas can lead to unwanted drafts, increased energy costs, and potential moisture problems, contributing to issues like mold and structural deterioration.

Seams, roof shingles, and foundation cracks are also important areas in building performance; however, they typically relate more to water infiltration and structural integrity rather than specifically to pressure boundary concerns. By focusing on penetrations and material junctions, one can mitigate significant pressure boundary issues and improve overall building comfort and efficiency.