Guest User
7/19/2007
Church is requesting proposals for reroofing using 22 ga. standing seam metal roof. Existing roof is asphalt shingles, replaced twice since 1965. Roof area is 10,750 sft. covering a floor area of 4480 sft. Structure consists of timber arches supporting a 3"x6" wood roof deck. From underside of roof deck to the finished cathedral ceiling ( 1"x6" T&G hemlock) there is a ventalted air space of 23". Roof pitch is 26:12, with actual roof height of 64ft., tapering to 26ft. at each end. It is desired to provide roof insulation with the reroof. One contractor proposes to place 11/2" poly-iso foam under the metal. Another contractor states that this is not desirable and the insulation should be placed on the inside between the roof & ceiling. This is do-able but would be difficult & labor intensive (confined space & steep slope). What are your thoughts on insulation placement?
Todd Miller
Isaiah Industries, Inc.
7/20/2007
The best choice is usually to have the insulation on the "warm side" of the vented airspace. That said, there are other options. Call me at 1-800-543-8938 ext 201 if you have questions.
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