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Air seal the rough opening around doors and windows to minimize air leakage.
Application of window and door nonexpanding foam sealant
Caulk applied against the backer rod to seal a window rough opening
Closed-cell backer rod for air sealing window and door rough openings
Right – Backer-rod is a foam product available in various diameters that can be used to air seal openings around doors and windows
Right – Rough opening around window has been filled with backer-rod to air seal
Right – Rough opening around window has been filled with low-expansion foam to air seal
Wrong – Fibrous insulation is not an air barrier and cannot be used to air seal openings
Wrong – Rough opening around window not air sealed