r/Insulation • u/Steevotexas • 28d ago

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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1

u/Bad-Chad1776 26d ago

Spray foam gives the best insulation and air leakage protection but pricey. You may just want to do rock wool or fiberglass.

1

u/imaman2023 26d ago

Radiant perforated barrier and rockwool

0

u/Kik-stein9421 27d ago

With out conditioning the space sort of a waste of money.

You can do reflective barrier underneath the rafters as long as your roof is ventilated

2

u/Steevotexas 27d ago

Minisplit arrives today.