(The bedroom ceiling fell on me due to a roof leak and the walls weren’t a lot better. Also their depth from the wall was uneven and I had to add nailers everywhere to convert to drywall. My 1920s house had studs wherever they felt like it, 14-19 inches on center. I am curious to see how well a fish finder would work. Beware of assuming 16 inch centers in plaster and lath walls. Even thought the spacing isn't even, measuring usually gets you close enough to locate the next stud approximately with a little thumping. A series of tiny holes localized to where the stud seems to be is a lot less impact to the plaster and less to repair. Once you get past the lath, there's no mistaking drilling into air versus into a stud. Take a concensus of whatever techniques you have to locate the highest-probability areas and then confirm using a drill. Most stud finders are terrible, but they may help reinforce other results. For me, thumping with my hand is usually the most accurate. The vibration from a power saw can be pretty good at loosening the plaster from the lath on some plaster walls. Every so often, the magnet will stick to the wall a bit on the stud location. Dangle the magnet against the wall and slowly move it horizontally across the wall. ![]() Assuming you complete that without breaking chucks out (which is easy to do), you are left with the plaster having a loose edge which is just inviting chunks to fall off later (if you are going to do that, at least patch over the groove later with patching plaster). Grab the strongest magnet you have and tie a piece of dental floss or string around it. In this video we mention Chris Cute and Make the First Cut Channel. The idea of cutting a slot seems like a bad one to me. How to find studs behind a lath and plaster wall with a magnet. I've got plaster walls too, and finding studs is a pain. ![]() They should have something on plaster repair if nothing on your specific questions. You might also make a "story board", maybe out of cloth or string that wouldn't shrink, and mark the stud locations on it for future use on the same wall.Īnother place to search for answers would be the "This Old House" web site. So my guess would be plaster material, or something made for repairing cracks in plaster walls. Wood Lath Nailed To Studs Attracts Magnet. If nothing else, it could help keep the two sections of wall from moving separately and creating other problems. Do you have a way to make sure there are no electrical lines running up and down in a wall cavity? Is the top of the wall in an attic where you could see if a wire is running down through the top plate? I wouldn't want to cut into one!! Do you need to fill back in the cuts? I don't know, but I'd think it would be a good idea to do so before installing the trim. Mark your line, but I would use a jab saw so that it stops at the stud, you could mark it, go to the other side, and cut to the next one, and so on. ![]() I think your idea of skimming to find the studs would work well. Vertical studs, wooden beams, and plaster make up the structure of older homes. I'm not familiar with working with plaster walls at all, so take these comments with a grain, or 2,000, of salt. Here are five ways to find a stud in a plaster wall: How To Find a Stud in a Plaster Wall.
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