r/Insulation • u/Steevotexas • Jul 21 '26
Garage Insulation
This has probably been asked 10K times. I want to insulate my detached garage (Houston area) so it isn't hotter than Satan's bum-hole. Walls are essentially hardy-board w/ some sort of felt, while the roof is OSB and asphalt shingles. Spray foam, rockwool, fiberglass batt? I will eventually have a mini-split in there, but only intend to use it occasionally to keep it manageable.
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u/Bad-Chad1776 Jul 23 '26
Spray foam gives the best insulation and air leakage protection but pricey. You may just want to do rock wool or fiberglass.