How to Repair a Crack in Drywall
LESLIE: Jan in Kansas is on the line with a home that seems to be cracking up. Tell us what’s going on.
JAN: Well, I’ve got a lot of problems. It’s an old house; it’s over 50 years old.
TOM: You have a lot of opportunities, Jan, not a lot of problems.
JAN: Yeah. I’ve got some cracks in the wall.
JAN: And I have one crack that is going from the dining room to the kitchen and I believe it’s cracking on both sides of the wall. Same crack.
TOM: OK. You said it’s 50 years old. Do you know if it’s plaster lath?
JAN: It’s sheetrock.
TOM: It’s drywall? OK. So, you know, fixing that is not a big deal. The thing is that most people usually fix it incorrectly. What they’ll do is they’ll try to spackle it. And by spackling it, you’re pretty much guaranteeing that it’s going to re-crack. What you have to do is sand down the area so you get rid of any glaze from the paint or dirt or anything like that. And then you’re going to cover it with drywall tape. And you want to use the mesh type of tape that’s sticky.
So you put a strip of tape across the crack and then you spackle right over that tape. And you’ll use three layers of spackle and the easiest way to apply this is if you buy the plastic spackling knives. You can buy one that starts at around 4 inches, then you go to 6, then you go to 8. And they’re pretty inexpensive and you use that to apply the spackle and you sand in between each coat. And then you prime and paint and you’re done. So those are the proper steps.
Where most people go wrong is they just try to do a quick and dirty spackling job and they wonder why it cracks again and again and again. Because that’s basically an expansion joint right now and unless you spread the repair across both sides of it with new drywall tape, it will continue to show up.
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