How to patch damaged plaster
You will need:
-
DIY finishing plaster
- Carrying board
- Plasterer's trowel
- Cold chisel
- Club hammer
- Paintbrush
- Bucket
- Timber batten
Interior walls can suffer a lot of wear and tear, especially in hallways. Small holes and cracks can be repaired with a ready-mixed plaster filler, but larger patches of damage on solid walls need a slightly different technique.
Time to complete job: About two hours for a larger patch.
Approximate budget: Around £15.
Tip: Before you patch an area of damaged plaster, make sure the cause of the damage has been remedied. If the area continues to feel damp or shows signs of mould, call in a professional.
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Step 1: Preparation
Use a cold chisel and a club hammer to chip away all the loose or cracked plaster around the damaged area. Brush off any loose building dust.
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Step 2: Dampening
Old bricks or blocks can be very dry and will make the new plaster dry too quickly by sucking out the moisture from the mix. To prevent this, wet the whole of the repair area with a paintbrush and water.
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Step 3: Plastering
Put some DIY finishing plaster on a carrying board and use a trowel at an angle to spread the plaster over the recess. You may find a timber batten is helpful to level the surface of the plaster flush with the wall surface. Smooth the plaster with a trowel.
Tip: If the hole is deep, you may need to build up the repair in layers. Check the plaster instructions for the maximum thickness of each layer. -
Step 4: Polishing
Wait for the plaster to begin to harden and dampen the surface with clean water and a paintbrush.
Polish the surface with the trowel. Work with gentle sweeping actions and the trowel held at a slight angle to the surface. Let dry.
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