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DIY Home Repair Forum: Roofing and Siding 03-31-2009, 01:53 PM
Replies: 5
Views: 1,458
Posted By GNiessen
Look for the highest R-value per inch. That way...

Look for the highest R-value per inch. That way you lose the least head room. But to get R-40, you will need more the 3 1/2". And once you are spraying the upper 4', you are probably better off...
DIY Home Repair Forum: Roofing and Siding 03-30-2009, 03:40 PM
Replies: 0
Views: 1,337
Posted By GNiessen
Ventilated Deck for Metal Roof

Is it important to have a ventilated deck for a metal roof? Or can you spray open cell foam insulation on the back side of the deck?

I am thinking the optimum is to have a metal roof, plywood...
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