Air Sealing and Fireblocking
Detail-work pages for penetrations, window and door sealing, and code-focused caulking.
Low-expansion polyurethane foam and backer rod sealant for window and door rough openings.
Window and door rough openings are among the largest air leakage pathways in a typical building envelope. We use low-expansion polyurethane foam (formulated to exert minimal outward pressure on frame assemblies) combined with closed-cell backer rod and elastomeric sealant. The foam fills the shim space without distorting the frame, while the sealant provides a durable exterior weather seal. This approach eliminates drafts and reduces energy loss at one of the building's weakest air barrier points.
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Detail-work pages for penetrations, window and door sealing, and code-focused caulking.
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