03 Jul '12, 12pm

Green Building Q&A: Double-stud wall insulation methods

Green Building Q&A: Double-stud wall insulation methods

We are building a new house in Wisconsin, zone 6, and are planning on using double wall construction, originally with dense-pack cellulose. None of the local insulators that we have talked to will install the cellulose. I am still searching for another insulator, but in the meanwhile I have been considering a flash and batt method with 3 to 4 inches of spray polyurethane closed cell foam on the exterior side of the wall and either batt insulation or blown-in fiberglass making up the remaining cavity. The space between the walls is 5 inches. Looking at a product like Roxul, can it be fitted where the SPCCF has been applied? It seems like that would be very fussy work. Also, the 5 inch space presents a challenge. I like the density of the Roxul, but I think this might not be the right application. Part of the appeal is that we could do the batt insulation ourselves and are m...

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

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