XL Foundation VentGuard™ by HY-C - 10 Pack

I found these to be perfect for mice, snake and small Critter exclusion work on brick foundations. I modify them by adding metal window screen with a thick bead of solar seal on the mating surface. Sometimes brick is irregular mating surface, this is why I use this method of mounting. I use hexhead tap con screws, painting them with black engine paint. The paint holds up better than other types during installs. These being made of powder coated steal, also protect the plastic temp-vents from larger animals like raccoons, possums, and armadillos. This XL size vent grills are perfect for fitting over the vent opening and giving a good drilling /mounting surface and sealing the circumference of the vent. They don't impede the operation of the temp-vents. My customers are very satisfied with the finished security and look.