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ScenicART t1_ixdohro wrote on November 22, 2022 at 5:42 PM

Reply to comment by ScenicART in How to mount something safely on a wall of unknown material? by zeurydice

to Add i think NYC fire code dictates double gypsum board to hit a minimum thickness for retardancy. could be wrong but thats why youll sometimes hit two layers of drywall.