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Caulk around air return?

Posted by atdev (My Page) on
Mon, Jul 2, 12 at 17:28

Our upstairs air conditioning unit is in our basement and sits on the concrete slap. The return air duct connects to the bottom. However the bottom has a small gap where it meets the concrete and air is getting sucked in through there all around the edges. Should I caulk around this with silicone? Pictures with notes...

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RE: Caulk around air return?


RE: Caulk around air return?

I would also keep a close eye on that tape that is on the ducts as it will eventually loosen up and leak if it isn't mastic tape. I would use a brush on mastic and cheap brush or use mastic tape to replace it. Matrix trap pure is harder to find but from what I have heard it seems to work well. Any other leaks that you attack with caulk and a f oam caulk combo will really pay off.

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