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You're basically asking how to build a free-standing deck. According to this calculator, you need 2x12 joists on 12 inch centers. If you don't already have one, I suggest buying a deck building book from the hardware store. It will tell you exactly what you need to know.


Attic ventilation is very important so make sure you pull away the insulation from the soffits. Purchase a small rake, a respirator and some quality gloves and do it before it’s the summer and the attic is now 40 degrees hotter than today. Depending on the climate zone, soffits are an important piece on attic ventilation. They reduce the chance of ice ...


Typically this type of structure is properly vented already as you described it. The pitched part of the roof is typically insulated tight with a 1" sheet of foam at the roof then friction fit unfaced. Then a plastic vapor barrier then drywall. Sounds like you're doing a roof so you might consider a foam roof substrate over the pitched rafters. Your existing ...

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