How to insulate my uninsulated house?
I live in a house in Kamloops, BC (40c in summer, -20c in winter, dry climate) that was built in the early 1950's. From inside out: Drywall, Foil-backed paper, 2x4 framing, Drywall (local plywood shortage at the time of construction), Tarpaper, Wood siding. There is no insulation in the stud cavities. The exterior is due for replacement, and I would like to add some R value at the time. I have researched PERSIST designs, and think it would work, but have a couple of concerns.
1) We do not have central air. Would this lead to a lack of air exchange in an air tight design? Could it be offset with exhaust fans?
2) Would the drywall exterior sheathing be OK to cover with peel and stick membrane. Don't see why not, but have not seen it addressed. Furthermore, would there be a problem adding the insulation directly over the existing siding?
3) Would the system work if the roof was left as is with a blown in attic?
4) Would there be a failure if the Insulation added to the outside was only 2 1/2" thick (R 12.5)?
Thanks in advance.
Posted Sat, 02/09/2013 - 03:24
Edited Sun, 02/10/2013 - 06:39
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