Concrete/concrete block – plaster finish sounds drummy

Plaster finish sounds hollow (drummy) if tapped

Causes

Loss of bond between plaster and masonry

Listed under: Interior, concrete and cement, concrete blocks, masonry, plaster and fibrous plaster, walls

Cause

Loss of bond between plaster and masonry

Repair

  • remove loose plaster; wipe over with a damp cloth to remove plaster dust; ensure underlying surface is rough to provide a good key to plaster; re-plaster and finish to match existing

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