Repair area
For irregular patches, measure the bounding rectangle (the smallest rectangle that fully contains the damaged area).
Repair depth
Surface damage assumes about 1/4 inch repair depth. Use this for chips, gouges, and old fastener holes.
Plaster type
Patching plaster is the easiest for most homeowners. Sets harder than joint compound and works for deeper repairs.
Materials needed
Patch area
0 sq ft
Total surface
Volume needed
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Including waste
Plaster needed
0 lbs
Dry material
Bags to buy
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Standard bag size
Estimates include 20% waste for mixing loss and over-application. Lath repairs need scratch, brown, and finish coats applied in layers – allow each to set before the next. Wet old plaster edges with water before patching to prevent the new material from drying too fast.