Step 3: Wet the Substrate

Wet the Substrate to repair plaster
Photo: Ben Stechschulte
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Dry lath and the exposed plaster edge will suck water out of wet plaster before it has a chance to harden. To prevent this, saturate those surfaces with conditioner. Wipe up any drips or overspray with a damp rag. Wait until the conditioner dries—about 20 minutes—before going to Step 4.
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    Tools List

    • drill
      Drill/driver
    • 1/8-inch drill bit
      -inch drill bit
    • 3/16 masonry bit
      3/16-inch masonry bit
    • wetdry vac
      Wet/dry vac
    • caulk gun
      Caulk gun
    • cleaning rag
      Rag
    • small plastic bucket
      Mixing bucket
    • margin trowel
      Margin trowel
    • to mix and apply plaster
    • plaster trowel
      Plastering trowel
    • to spread and smooth plaster
    • notched trowel
      Scarifier
    • six-inch taping knife
      6-inch taping knife
    • grout sponge
      Sponge

    Shopping List

    Wood lath
    1-inch drywall screws
    Plaster conditionerPlaster adhesive
    Patching plaster
    Ready-mix joint compound