Foundation Vent Covers vs Outward Mounted Crawl Space Vent Cover 8x16

Buy the aluminum foundation vent cover (A) if you want a rigid, corrosion-resistant screen that keeps debris and animals out while still letting the crawlspace breathe. Buy the ABS encapsulation cover (B) if you are sealing vents for good during encapsulation or a conditioned crawlspace. A is a passive vent accessory that installs by nailing to joists or replacing a block; B is a solid outward-mounted plate that ends passive ventilation. Owners of foam-style vent seals report they need trimming and extra fastening, so a rigid cover is the more dependable fit.

• Choose the aluminum foundation vent cover if you want to keep ventilation open while blocking animals and debris, and you prefer a metal cover that nails to joists or drops into a block opening.
• Choose the ABS encapsulation cover if you are sealing foundation vents permanently for encapsulation or a conditioned crawlspace and want a paintable plate that mounts over a standard 8 in. by 16 in. opening.