Interior insulation for a backyard cabin with an unvented roof
I’m building a small 10×10 ft 3 season cedar cabin in my backyard. The framing and exterior plywood sheathing is complete and I need to figure out how to insulate it.
The roof is a shed style roof (lean to). I’ve installed blocking between the 2×6 rafters at the ridge and eave for strength. I plan to have an unvented roof. Due to height restrictions, I will be insulating the roof from the interior. The roof consists of 5/8” plywood, synthetic underlayment, and a sheet metal roof.
I’ve read Martin’s response to the question in this thread, which partially answered my question (https://www.greenbuildingadvisor.com/question/off-grid-cabin-cathedral-ceiling-insulation).
For interior insulation, my plan is to put Rockwool batts between the 2×4 studs and between the 2×6 rafters. I’m going to skip the 2 inch layer of continuous foam to maximize interior space. The next layer would be a product called Thermoquiet (https://www.amvicsystem.com/products/thermal-acoustic-insulation/thermoquiet/), which would be installed over the entire interior surface. This would act as the vapor barrier.
The interior of the cabin will be finished with cedar planks. Do I need the layer of drywall or can I attach the cedar planks directly to the studs? I should also mention that the space will be heated with a baseboard heater and cooled with either a portable or window mounted air conditioner.
The exterior is 1/2” plywood, Tyvek Housewrap, and cedar siding attached to furring strips.
Any tips or considerations would be greatly appreciated!
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