Michigan State University Extension
Home Maintenance And Repair - 01500447
06/24/03

Repairing Small Plaster Cracks


Common fasteners do not perform too well when used on
plaster and result in holes or cracks which are
unattractive. Settling or shrinking of walls also cause
cracks.

Small Cracks
Small, narrow cracks can be filled with patching
plaster.

1. Remove loose plaster and with an icepick or knife,
clean the crack so it is wider at the bottom than on the
surface. This allows the new plaster to stick better.

2. With a brush or damp cloth remove loose plaster
dust. If water mixed plaster is used dampen the crack.

3. Fill the crack with patching plaster using a criss-
cross motion to work it in.

4. With the wide putty knife feather the edges of the
patch, about 2" on each side of the crack, so it will
be less visible.

5. When dry, sand lightly and paint.(Vis. 1)

This article was written by Anne Field, Extension
Specialist, Emeritus, with references from Michigan
Extension bulletin Wall Repair and Fasteners.

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