Hi, I'm planning out taking my garage from the 1940's to 2016/'17 and want to know if I need to insulate or not. My goal is to drywall and than hang cabinets and organize storage. It will not be a living space.
Location : Los Angeles, CA
Size : ~ 400 sqft
Soffit vent : None whatsoever. You'll get a wave of stale warm / hot air on any day when opening the garage door.
Construction : Slab foundation and three walls erected on top of a concrete block border. Roll up garage door in front. Inside the garage is open, uninsulated walls with exposed framing with studs 24" on center. The roof/ceiling pitches upward (cathedrael / vaulted). Stucco exterior.
With no venting and being in the winter-mild summer hot southern california area, what preparation, if any, do I need to make before throwing up drywall or other wall surface ? Since my goal is more of a tidy (cosmetic) garage that is well organized for storing stuff, so I get get all the stuff my wife is cramming into the house out of it, will a radiant barrier against the wood underside (insude side) of the ceiling be sufficient to mitigate radiant heat from the sun beating down ?
Also, is Drywall on the vertical walls even necessary or are there other options for a clean look ?