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-   -   Plaster walls (https://www.askmehelpdesk.com/showthread.php?t=150069)

  • Nov 8, 2007, 08:34 PM
    STONECOTTO
    Plaster walls
    Hello what is the best way to cover plaster wall holes about 3" big
  • Nov 8, 2007, 08:38 PM
    Clough
    Can you see wood lath where the plaster was?
  • Nov 9, 2007, 10:50 AM
    STONECOTTO
    Most of the holes are in the ceiling.I rewired my house and I had to do a lot holes to run the wired. The ceiling is halo. Tank you
  • Nov 11, 2007, 08:36 AM
    Rover88
    I just went through this. I cut and fit pieces of lathe strip into the holes, then used a quick-setting patching plaster (Web Coat?). First plaster application was a rough fill; after this dried I went back for a final coat. Some sanding may be necessary, depending upon how well you finish the final plaster application with the trowel.
  • Nov 13, 2007, 05:51 AM
    KBC
    In addition to the above comment, try wetting the old plaster before you apply the new topping, this allows the old to retain a little more moisture during drying time, lessening the cracking.

    Ken
  • Nov 18, 2007, 09:48 AM
    STONECOTTO
    Quote:

    Originally Posted by Rover88
    I just went through this. I cut and fit pieces of lathe strip into the holes, then used a quick-setting patching plaster (Web Coat?). First plaster application was a rough fill; after this dried I went back for a final coat. Some sanding may be necessary, depending upon how well you finish the final plaster application with the trowel.

    What is web coat
  • Nov 18, 2007, 10:14 AM
    Rover88
    Web Coat is a fast setting (15-20 minute working time) plaster. I bought it from my local paint store, but I see that Lowe's and Depot sell other brand names of the same type of thing. Mix with water, and it's kind of like drywall joint compound, but sets faster and harder.
  • Nov 21, 2007, 10:08 PM
    TerryB
    Sheetrock 20 is another. Be careful when wetting the old plaster. Some the old lime based plasters have a tendency to self-destruct when they get wet.

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