Hanging a heavy mirror isn’t all that difficult, and it barely takes longer than hanging lightweight mirrors or pictures. You just need a few simple tools and inexpensive hanging materials.
2 Ways to Hang Heavy Mirrors
Hang a heavy mirror either by a wire on the back of the mirror or with a solid metal cleat screwed to the wall studs.
Screws and hanging wire: Two screws 16 inches apart are screwed to adjacent wall studs. A strong metal wire on the back of the mirror is draped over the two screws. If the mirror does not have a hanging wire, one can be installed as a separate process. Purchase only braided stainless steel wire intended for hanging mirrors and pictures.
Metal cleats: A metal cleat, or strip, is installed on the back of the mirror. Another cleat is installed on the wall. The mirror’s cleat is hung over the top of the wall’s cleat in an interlocking fashion.
Do not use drywall screws as supporting fasteners since they are brittle and may snap. Mirrors and pictures are sometimes hung directly from drywall but this is an inferior method that may result in the fastener pulling out of the wall.