I know I’ve got it on my shoes.īut no, it’ll stick to anything it’s fantastic for that kind of stuff. I’ve actually taken – joint compound is amazing stuff it’ll stick to anything. Does one do a better job than the other when you’re going over old plaster? You can get plaster and mix that up, you can buy standard spackling and joint compound out of the bucket. TOM: Now, let me ask you about the joint compound, because these are originally plaster walls. You leave it for 24 hours, sand it lightly and then you wire it or tape it, go over it with joint compound. And you’ll see the adhesive come out all the little holes that you drilled. Use these big plastic rings and you screw the plaster gently back to the lath. TOM SILVA: And that basically is an acrylic adhesive that you have to wait overnight. TOM SILVA: There’s also a product that you can glue the plaster back to the lath by drilling a series of small holes next to the crack and inject it with a caulking gun. You screw it in gently because you don’t want to break the big – you don’t want to break out a chunk of plaster so you defeat your purpose. TOM SILVA: Yeah, a perforated washer, right. TOM: So that’s kind of like a washer, almost, that pulls it back in. So the easiest way to do it is – if the plaster is really loose, you put these plaster buttons in and you can fasten it back to the wall or you sometimes … And that netting will bridge any gaps and that netting gets stuck onto wet drywall. LESLIE: So are you almost creating a netting in the event of delamination? TOM SILVA: And I can have a big piece, so I can actually do a whole wall. You get – what I sometimes – what I’ll do is I’ll go to the hardware store and I’ll get a roll of plastic – what do you call – vinyl screening wire. TOM: So the screening wire is kind of like that perforated drywall tape that we have today, right? It’s sort of a … But I always like to take a piece of screening wire and cut it much bigger than my patch and blend it right into the wall and then hide it that way. And then you can feather it out around it with a piece of – with some joint compound. In that case, you’re going to need a thinner piece, like 3/8-inch, because you don’t want to be too thick. TOM SILVA: But if it’s really bad, you may have to cut a piece of the old plaster out and insert a piece of wallboard into the plaster laths. TOM SILVA: So you’ve got to basically know now what you’re going to do, how bad is the crack and how do you fix it? You could simply, in some cases, just drag a little – if you had like a little screwdriver or old beer-can openers with the V-notch, you can drag a little bit out and you could put some plaster or patch in the wall and then paint it it’d be fine. I mean you can see it if you’re sitting in a room and knew someone who walked across the room or feel it, you can actually feel the – well, think of – wind will do the same thing on your side walls. Or if your kids are playing and you’re bouncing on the floor, the house is moving it’s shaking. Think of it: on a windy night, that house is moving. And they’re attached to the wall and then the plaster, when it’s first put on, it pushes through that lath and then spreads out and sort of locks behind it. Because old homes typically have wood lath, so that’s wood sticks and I think they look like tomato stakes. You mentioned the keyway I think that’s important to understand. TOM SILVA: Because the keyway behind that plaster wall will break from the vibration of the house, from the wind and the movement. You can net it, go over it, glue it back to the lath. It’s going to crack.īut how do you fix a crack is a different situation. You get temperature changes, expansion and contraction. A windy night, the house is shifting around. It’s an old house they get a lot of movement. TOM SILVA: Well, you’re not going to stop the plaster from cracking.
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