I am in the process of building a 16'x32' detached garage/workshop. Its 2x4 framed and has 11 foot ceilings, and a gable roof. I'm in southeast Texas so high heat and humidity is the biggest concern but Im also interested in a decent amount of sound insulation. I'm planning on getting an oversized Mr. Cool DIY minisplit to cool the space but I'm going back and forth about insulation. I'm between two plans.
1) R-15 rockwool in the walls and R-30 in the ceiling with a vented attic
2) spend the money on spray foam and go ahead and seal in the attic with foam on the roof deck
Attics near me get insanely hot so you are limited in what you can store there unless it's conditioned so insulating it adds alot to the usefullness. But with the high humidity I am concerned about water damage in the roof if it's unvented. Anyone have experience with unvented attics in hot and humid areas?
1) R-15 rockwool in the walls and R-30 in the ceiling with a vented attic
2) spend the money on spray foam and go ahead and seal in the attic with foam on the roof deck
Attics near me get insanely hot so you are limited in what you can store there unless it's conditioned so insulating it adds alot to the usefullness. But with the high humidity I am concerned about water damage in the roof if it's unvented. Anyone have experience with unvented attics in hot and humid areas?