I plan on using 5/8" in the ceiling because there is living space
above. But I disagree about the fragility of drywall for the walls.
I use my garage a lot for projects. And you bang a 10' long board
into drywall accidentally and you have a big gouge. You bump it
rolling a jetski around and you have a gouge. It is fragile. Hit it
with anything heavy even lightly and it gets damaged. It's easy to
say don't do that but it happens. And I have a 30x28 garage so
putting up expensive hanger boards all over is not an option.
Depends on local code. My detached garage had nothing inside, just the open
framing. It is not a living space so it did not matter. Codes may vary
from town to town though.
I did, however, insulate it and drywall it because I use it as a shop and
heat it in the winter sometimes.
This is a detached garage, right?
If so, why bother with drywall? It's main purpose is fire retardation and
that's usually not much of an issue in a detached garage.
Drywall has only a minuscule insulation property (R=0.45) which can be
almost matched with 1/4" plywood (R=0.31).
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