28 Feb '12, 11pm

A insulation contractor gave me the option of a wet spray blown-in fiberglass product. Made by Guardian, ... #green

I don't have direct experience with this product. Be aware of trapping construction moisture inside of walls, though. All wet-applied materials must be allowed to dry fully or the risk of mold increases significantly (even in Climate Zone 5). This may mean waiting on the drywall until the insulation has completely dried out. With fiberglass, I'd assume fans and heaters could be used to accelerate the process, but you should check with the manufacturer because some binding agents release flammable chemicals when they dry/cure. The problem of trapping moisture inside walls gets worse as the building enclosure gets better, ironically - due to the reduced drying potential. There just isn't enough heat flow nor sufficient infiltration to help the moisture migrate out to air.

Full article: http://www.greenbuildingadvisor.com/community/forum/gener...

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My recommendations on residential insulation levels by climate zone. This week's blog:

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Hi, two questions if someone can help me out: 1. Is formaldehyde an issue in all types of fiberglass insulation (ie, batts...

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