Wall insulation and air infiltration
I am doing some remodeling and I want to improve my energy efficiency at the same time. I will be replacing some windows in my 1950s house in Austin, TX, and I would like to improve the wall insulation and reduce the air infiltration as well.
From inside to out, my wall construction is: 1/2 inch drywall, 2×4 framing with about 1 inch of paper backed fiberglass insulation, felt paper, and vertical rough cedar siding. There is no plywood, OSB or other sheathing behind the vertical cedar. One wall of the house has limestone on the lower half of the wall with the cedar on the top half.
How would you recommend to reduce the air infiltration and insulate this wall construction?
I have read of many combinations of spray foam, sheets of foam insulation, plywood/OSB, and other types of insulation but it is not clear to me what is best for my situation/location.
Thank you for your responses.
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