Insulation, Radiant and Vapor Barriers - Insulating and ceiling duct work

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leventmine
01-27-06, 01:24 PM
Hello,

I am currently finishing my basement and would like to know if duct taping around my duct work like in the seams and basicaly closing up gaps where there may be possible hot air leakage would help in air flow up to the 1st and 2nd floors. Or is there another method to do this?

Many thanks for any help!


ArgMeMatey
01-28-06, 08:08 AM
Hello,

I ... would like to know if duct taping around my duct work like in the seams and basicaly closing up gaps ... would help in air flow up to the 1st and 2nd floors. Or is there another method to do this?


1. Don't use duct tape. It won't last. Foil tape is more expensive but about as easy to apply. http://www.tycoadhesives.com/SearchProductsDetails.aspx?ID=77

2. Mastic. I bought a bucket of this but I will confess I haven't even opened it yet. I am thinking it's tarlike.
I bought mine at efi.org
http://www.energyfederation.org/consumer/default.php/cPath/86_743_109

3. I also ran across this when I googled "mastic duct":
http://www.aeroseal.com/hiw_01.html

wflora
02-19-06, 02:09 AM
Duct sealant is the best. Brush it on with a disposable 2" paintbrush. Foil tape is a very good option also. Never use duct tape. It will fall of in about 2 years. After sealing you should wrap the duct in at least R-4.2 fiberglass insulation