Drummy plaster in foundation walls
Listed under: Exterior, concrete and cement, plaster and fibrous plaster, foundation walls, walls
Cause
Loss of bond between the cement plaster and the concrete
Cause
Corrosion of reinforcing in the concrete
Repair
- small areas may be left as they are
- for large areas (that may be visible as plaster bowing out), remove loose plaster; scratch to roughen the substrate to provide a good key (repair any damaged concrete); re-plaster with a cement plaster