If you're the homeowner and not making major changes, some jurisdictions will allow replacing existing wires and outlets with new but National Electric Code (NEC) says that if a wall is opened for major repairs and wiring work then the entire wall must be brought up to current code. get rid of knob & tube wiring), add many outlets, insulate and air seal exterior walls (a great idea!), or make other large changes, lean more toward removing large rectangular areas of the plaster and corresponding lath, do all your work, then repair the openings with drywall. If you plan to make major wiring changes (e.g. Your final surface should be either drywall or at least 1/4" thick plaster so it has enough strength to hold, a simple skim coat will almost certainly pop off.
OLD PLASTER WALL PATCH
Note: drywall & plaster patch expand and shrink at different rates with temp and humidity changes. to fill up to the finished wall thickness. Allow everything to dry a few days until the surface is light colored and warm to the touch before applying paint (it's dark and cool while it's still wet).įor patches larger than 3-4" with the lath mostly intact, larger patches, or areas missing much of the lath it's easiest to fasten wood strips inside the wall, screwed through the existing wall to hold, then lay a drywall patch to build up close to the wall thickness. Trowel it smooth to match the existing surface before it hardens. Areas over 1/4" thick may take 2 passes apply a base "scratch" coat with an intentionally rough surface, then a second "finish" coat over the top. (I used plaster of paris and patching plaster from a local hardware store.) Make sure to squish the patch through the lath to form the keys that hold the patch on the wall. Mist the raw edges with water, then use structolite, patching plaster, or similar to fill the holes. brush off any loose plaster, undercut the edges of the plaster if possible, and clear the gaps in the lath. For holes up to 3-4" wide with the lath still intact. The simplest fix is if you're just patching small holes and a few loose spots and don't plan to do much more. As others mentioned above, your next step depends on your future plans. Wash the wall thoroughly with more vinegar & water and old towels to remove paper remnants and glue so plaster patch and paint will stick. Be careful not to scratch and gouge the wall. Use a putty knife to scrape off any paper remnants. After a few minutes you'll probably be able to pull it off in big strips. If the paper starts to dry, spray it again.
Spray the paper liberally with the vinegar mix and let soak 5-10 minutes. Mix 1/3 white vinegar with 2/3 hot tap water in a spray bottle set on a heavy mist.
Swirl it around the wall to make pinholes in the paper for water to soak through. Get one of the palm type paper perforators. Cover the whole room with tarps and wear old clothes, it's going to be messy, wet, and sticky. Others have touched on many good points but I'll share things I ran into.įirst, the easiest way I found to remove the wallpaper. I ran into the same question (and the same wallpaper!) when I started working on my 1929 Craftsman.
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