I came across this old thread “Drywall too much $$$$.” I voiced my opinion then to use drywall and not flammable OSB. The December 20, 2020 a fire in my garage shop wholeheartedly supports the reason to use drywall in any garage. Codes vary in different areas. Any attached garage require dry wall, and or 5/8” fire rated between any living quarter walls is standard code. I did one better by using 5/8” fire rated drywall on all walls and ceilings of all my buildings that made a huge difference in the outcome of that fire. Both the local Fire Marshall and Insurance Fire Investigator indicated the use of fire rated drywall saved my house and maybe life! And I live but five miles from the fire station...
There were numinous signs where the molten steel from the batteries splatter the drywall. But nothing penetrated through. In fact the shop's second floor had no damage including smoke damage. Along with the garage with a joining wall and house.. All the three-phase wiring in steel conduit was melted solid. Yet any wires beneath the drywall was intact.
Best looking and easiest cleaning put a smooth finish on all drywall with no texturing. In the past I used oil based enamel paint over the drywall. Since it's near impossible to purchase today. I used Sherwin William's Pro Industrial Pre-Catalyzed Waterbased
Epoxy. That's easily cleaned using modern day cleaners.
From ashes to my New Toy Shop,, After two full years of my time without any outside contracting...
