I removed tile from the lower half of a bathroom wall in a 100 year old house and replaced with drywall to butt up to the existing plaster over lath section above. I’m installing a 30″ square medicine cabinet that will set a half inch out from the wall. The photo below rotated 90 degrees left upon upload, so visualize the cabinet being on the left.
My original plan was to fill the gap with Durabond 90 right up to the cabinet. Now I think it would be prudent to leave a 1/16 ” gap to allow for expansion/contraction of the dissimilar materials. I would then caulk the gap. What’s the best way to create this void?
Maybe use a removable Plexiglas spacer that I could remove after mudding up against it? Or attach a thin self-adhesive foam weather strip to the cabinet? Then trim the weatherstrip back slightly to allow for caulk.
I prefer to not cover the gap with a thin moulding as there must be room for fingers to go behind the overlay cabinet door for opening.