17 Jul '11, 5pm

Green Building Q&A: I am in the midst of a re-roof that was spawned by water damage. We're taking off concrete s...

One Cathedral ceiling has 2x4 roof joists that will be shimmed to 4 and a quarter inches. In some places on this roof the original skip sheathing is in place which could be left in place (at least most of it) while removing the batt insulation. This is a nonvented space. The other Cathedral ceiling has 2x12 roof joists. This has some soffit vents but no ridge vent. When we put on our new roof (Futureroof.com) which is a metal roof that is supposed to be a cool roof, we could put on a ridge vent. My hope is that we can make it a non-vented space as well. I’ve learned about how venting was simply a solution to wet batts but that it brings in cold air, brings in moisture, and brings in air movement—all which lead to condensation. Both ceilings have to be insulated from the deck down. The roof with 2x12 joists has some exposed bays from the bottom so that could have up and dow...

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

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A heat wave is rolling across the country. Beat peak water use with our tips #beatthepeak

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epa.gov 18 Jul '11, 3pm

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