Use Spray Foam to Air Seal from Inside (not included)
Reviews
4.5
6 ratings
5
4
3
2
1
The foam for foundation vent covers worked great. Most didn’t have to cut to fit. Some had to be trimmed and be filled with great stuff,easy way to close in the crawl space. Thanks crawl space ninja!
L
Lee · February 2, 2026
They are nice and heavy duty, but the only way to get them to adhere was by adding very powerful magnets to attach the covers to the installation screws on the metal screens. Magnets stick to the screens but the magnetic vent covercant support their iwn weight.
K
Kathleen · January 18, 2026
Easier to manage
Small pieces were much easier to manage than a 4X8 sheet of foamboard. Although, it would have been helpful if the pieces were cut 1/2" smaller top to bottom side to side to allow space for the spray foam.