Summary: Learn how to repair and patch plaster, patch small holes in plaster, patch large holes in plaster and repair a corner using plaster.
Repairing an area of damaged plaster is called patching. The size of the damaged area will determine the method of repair you use.
Larger areas of damage can be patched using a one-coat plaster. Always mix the plaster according to the manufacturer's instructions, but generally 1kg of powder is mixed with 500ml of water. As a rough guide, 10kg should cover about 1.5 sq m (1.8 sq yards) at a thickness of 10mm (4in).
Fill in the damaged area using a plastering trowel gradually building up the layers.
Temporarily fix a batten vertically to the wall on one side of the damaged area.
Fill the damaged area with plaster making sure it is flush with the edge of the batten.
After fixing the anglebead in place, apply plaster to the area with a trowel and tie it in to the edge of the existing plaster.
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