The Invisible Detail Required by Code
- Apr 19
- 1 min read
The Invisible Detail Required by Code.
Air sealing is now required by building code in new construction, but many older homes lack it entirely.
Small gaps around windows, doors, and framing allow air to leak in and out, leading to drafts and energy loss.
This post explains what air sealing is, how it works, and why it’s just as important as insulation for comfort and efficiency.

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