30 Nov '11, 5am

Green Building Q&A: Garage/Attic insulation dilema

I meant vapor retarder, referring to the kraft paper face on the batts. The actual insulation consists of R-38 batts on the ceiling and the sloped walls contain vent baffles, R-30 batts, and 2" foam board (R-10) on the interior side of the batts. The vertical walls are R-21 batts. Heating will be provided by a woodstove in the adjacent studio on the upper floor and a small wall heater. I have not installed and currently do not plan to install heaters in the attic rooms as of yet. I will use one of the two rooms in the attic for a bedroom while I build our main home, but eventually I don’t feel there will be a need to heat these spaces. None the less, I installed ducting and a dedicated HRV system to help control interior moisture in the upper floor (including the attic rooms). I’d like to maintain the upper floor temperatures between 63 to 68 degrees, thus my dilemma on ho...

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