I need to do some repairs to my 53 year-old plaster walls. The lath is metal mesh grid, which holds a sandy colored base. And the finish coat (yes, there might be another layer between this and the base) is a nice, smooth, creamy colored surface. I have a lot of patience and am willing to do it the way professionals would if I have to.
I have some narrow cracks that I can dig out to hold the plaster patch. Exactly what type of plaster is used here? Gauging plaster with lime? Moulding plaster? The guy at my office who repaired the plaster walls (and did a fantastic job) said he used lime and moulding plaster.
For larger areas, where pieces have broken away all the way down to the lath, do I need to use two types of plaster?...One for the base to bond with the lath and rest of the base and one for the finish surface?
And for cracks that might open up again, should I dig down a little and bury fiberglass tape across the joint and below the surface?
Mike