How to repair damaged plaster
Step-by-step DIY guide on repairing plaster cracks and holes in your walls or ceiling.
What you'll need
- Drop sheets
- Dust mask, work gloves and goggles
- Scraper
- Spray bottle with water
- Bonding and sealing agent
- Carrying board (to hold plaster)
- Plaster
- 100mm and 150mm broadknives
- Sanding block
- Primer and paint
- Filling knife
- Sanding float and abrasive paper
STEP 1
To repair a plaster crack, first move furniture out of the area and put down drop sheets. Wearing a dust mask, eye protection and work gloves, rake out any
loose material with a suitable scraper.
STEP 2
Dust the inside of the crack and lightly mist with water; wait until it’s absorbed. Mix a bonding agent; let dry. Apply the plaster and fill the hole. Sand when the plaster is completely dry. Spot-prime and paint.
STEP 3
To repair a hole, remove any loose or crumbling plaster with a scraper. Dust inside of the hole and mist with water; wait until it’s absorbed. Apply a bonding agent, and allow about 45 minutes to dry
STEP 4
Using a 100mm broadknife, fill the hole with plaster from the centre out to a depth just below the wall surface. Before the plaster sets, scratch surface with a filling knife to create a crosshatch pattern. Let dry.
STEP 5
Using a 150mm broadknife, apply a finishing coat (use skim-coat if available). Check wall is level and smooth. If necessary, apply another thin coat of plaster. Sand lightly with medium abrasive paper.
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3 of 4 Comments |
| Jim on 12 October 2011 ,14:11 Excellent article. But it does not address what to do if your plaster is merely cracked and loose rather than missing entirely. Here's how we fix loose plaster using modern adhesives and common household tools. All of the stuff required is available at your local hardware store. Here are the step by step instructions: http://starcraftcustombuilders.com/HowToFixPlasterWall.htm Good luck. |
| ceiling-man on 06 October 2011 ,13:35 Innovative new technology by www.saggingceilings.com.au The solution for all types of sagging ceilings. |
| Elke on 03 July 2011 ,15:59 Being a complete novice: can you explain what a "bonding mix" is?For example I bought Boral Patching Plaster - would that be correct? My house is old and built on a slope, it has lots of movement and all walls have deep horizontal cracks at a height of 210cm off the floor. Thank you. | See More Comments |
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