01 Apr '13, 1pm

XPS Interior Closed Cell Roof Insulation DIY #green

Quick question for you building experts! It's a 1920s house with wood planks all over, no vents no plywood, a new metal roof installed right over 3 layers of self adhering premium underlayment. No gaps no venting. I bought 2 in XPS from HD, cut it and placed under roof deck between rafters. Left 1/2 in gap around and used Great Stuff to spray around it and sealed it. Actually this method appeared quite easy and it's much quicker to do than I thought once I figured out how to do it efficiently. It takes me about 20 minutes per rafter. Should have done this long time ago.... Now because I am suffering from moisture paranoia I bought some nice and cheap little hygrometers from china (like dozens) and I placed them BEHIND the XPS. Basically between the roof deck and the XPS board. The wire is sealed with great stuff. I made sure there are no gaps around the XPS boards and it s...

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

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