In terms of construction, which type of air barrier is generally more challenging to implement?

Implementing interior air barriers can be challenging due to several factors associated with their installation and effectiveness. Interior air barriers are often used in conjunction with other elements within the building’s thermal and moisture control layers. They require meticulous detailing to ensure continuity at all seams, penetrations, and transitions, which can be complicated to manage during construction, especially in occupied spaces or where multiple trades are working simultaneously.

Furthermore, the effectiveness of interior air barriers relies on effectively sealing against the interior environment, which may include varying humidity levels and temperatures that can affect materials and labor conditions. This adds another layer of complexity to the installation process.

In contrast, exterior air barriers are typically integrated into the building envelope during the initial phases of construction and can be more easily managed in terms of access for sealing and applying the barrier material. Temporary air barriers are designed for short-term use and often do not require the same level of precision as permanent installations. Passive air barriers, while also requiring careful consideration, tend to rely on specific materials or configurations that can simplify their installation compared to the thorough detailing necessary for effective interior air barriers.