ATMOX Internal Mount Crawl Space Vent Covers vs Recessed Crawl Space Vent Cover 8x16

The ATMOX internal-mount covers are the better pick for sealing an existing crawl space vent from the inside, especially when you need several. They are plain plastic plates screwed to the wall behind the opening, sold five to a pack, and owners use them to block winter airflow. The Shallow Recessed cover is a single finished-looking insert that sits in the foundation opening with a 1-1/4 inch depth, but it ships without fasteners or adhesive and is non-opening. Build on both is basic plastic; the ATMOX is the more practical bulk sealer, the recessed cover the neater single-vent look.

• Choose the ATMOX vent covers if you want to block outside air from several crawl space vents and can reach the wall from inside.
• Choose the Shallow Recessed cover if you want a white or black recessed insert that finishes one foundation vent opening from the outside face.