06 Aug '13, 4am

Low slope roof with a PERSIST / REMOTE house? Possibly using insulated metal panels instead of steel deck #green

Follow-on to my last question about insulated metal panels in a PERSIST wall system, I am wondering about roof. My understanding is that one of the differences between REMOTE and PERSIST is that REMOTE utilizes a vented attic. For a low slope (2 degree) flat roof, what would be recommended? Do I adopt PERSIST wall structure (modified with insulated metal panels instead of exterior foam board) with the addition of a top layer membrane and sheathing? (inside to outside) i) GWB ii) MemBrain iii) 2x6 framing (5.5") iv) 5" Roxul (mineral wool) for R16 (yes, am considering leaving 1/2" gap for wiring / plumbing chase) v) 1/2" Plywood structural sheathing vi) Tyvek Drainwrap vii) 3" Roxul Comfort CIS for R12 (supports fasteners, drainage, fire barrier) viii) 4" IMP for R28 with screws fastened through to framing iv) TPO or some other membrane. OR totally get away from the IMPs fo...

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