COMMUNITY FORUM

Indiana

07:40AM | 10/25/01
Member Since: 08/27/01
52 lifetime posts
Bvhvac
My dryer vent (standard 4" round metal pipe) goes through my basement box sil. When they put it in, they drilled about a 5" hole, and now there is a large gap all the way around the vent. Is it OK to insulate this? I was going to buy the spray insulation that expands, but I'm not sure if the heat from the vent could pose any problems. Thanks for your advice.

Jay J

09:12AM | 10/25/01
Member Since: 10/26/00
782 lifetime posts
Hi Indiana,

If you do use a spray foam, use a MINIMAL Expanding Foam. If you use the wrong one, the foam may crush the vent and create a hazard or 2.

Or, you can use regular fiberglass batt insulation. It's not that you're really trying to 'insulate' around the duct. It's more like you're trying to keep animals and such out of the house. (If you're insulating, use batt insulation in the joist bay(s) right up against the ribbon board / sill plate.) If your basement is a cold one, consider insulating the duct with 1/2" fiberglass insulation duct wrap. This will help prevent moisture buildup in the duct.

My best to ya and hope this helps.

Jay J -Moderator

PS: God Bless America!

Indiana

09:17AM | 10/25/01
Member Since: 08/27/01
52 lifetime posts
Jay,

So my best bet is to use regular fiberglass insulation? And there's no need to worry about heat in the vent and having insulation tight to the vent? Thanks.

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