How to insulate steel beam cantilevers to exterior?
I am building a home with a large amount of steel beam cantilevers to the outside of the structure. I am worried about thermal bridges to the inside of the home, condensation, etc.
Directly against the web of the beam would be placed the sheathing, and then the siding (stucco). Directly below the flange would be a stucco board and then stucco.
Since both the web and flange are right next to the exterior, what is the best method of insulating? I was thinking of filing the web with rigid, foam, or wool, and then applying a Dow insulated sheathing (R-3 to R-5).
As for the flange, the only thing I could think of is using a 1/2" thick foam insulating board, with a wire lath and then applying the stucco. That would maybe give it a R-2.5 below the flange. On the other side of the web we are stuffing the wood TGI's. So likely it won't be insulated or I could spray an 1" of foam in there.
Recommendations? Products? Anyone have any better ideas?
Posted May 31, 2011 10:14 AM ET
Edited May 31, 2011 2:23 PM ET
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