Re: How to Hang 100lb mirrors
Purchase weight rated hooks and install them as per the instructions with the designated fastener. Typically that will be with a lag screw into the framing of the wall. If you don't have one, get yourself a stud finder to locate the 2x4 framing. Before you predrill the hole for the screw, use a small gauge finish nail to probe and find the exact center of the stud, then drill the hole. If your mirror has a hanging cable, the hooks won't have to be exactly level, however, if the mirror has cleats on the back, then you'll have to make sure the mounting hooks are level.
Hope this helps.
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