How to Repair Plaster Walls: DIY Step-by-Step Guide

In our everyday lives, we all come across small problems that can easily be fixed ourselves without getting the help of a technician. One such problem is repairing a damaged plaster wall, this although seems like a really hectic task, it can be done quite easily in a couple of hours without having the skills of a hardened construction worker.

You can easily use this guide to plaster over any damaged walls or area of a wall, make sure to follow the guide concisely and to follow the safety instructions of your state to ensure that there isn’t any fire hazard, safety violation, or any other sort of danger while you are applying this in your home.

Be on special guard for electric cables, Pipes, or other things that might have been fixed behind your wall, and remember to wear the appropriate safety equipment beforehand.

In this guide, we will be teaching you how to repair plaster walls and will take you through the step by step process, the equipment, and things that you require and by the time you have read through this, you will be able to easily repair any damaged plaster wall all by yourself.

Things You Will Need:

  1. Sandpaper.
  2. Safety Goggles.
  3. Scraper.
  4. Cable and Pipe Detector (Optional).
  5. Screw/Nail Remover (Optional).
  6. Diluted PVA.
  7. Steel Ruler.
  8. Spirit Level.
  9. Plaster Repair and Skim.
  10. Plaster Repair Filler.
  11. Flat Plaster Tray.

Before you Start:

  1. Make sure to thoroughly examine your house plans to detect if there is anything behind the wall already and it is better if you have a “Pipe Inspector” which is a tool to detect if there are any pipes, electric wires, or any other material behind this wall.
  2. After making sure that there isn’t anything behind the wall, you need to make sure to scrape any loose plaster off the damaged wall to ensure that the new plaster that we will be applying stays on and holds to its place.
  3. Once you have scrapped the damaged area, it is best to use the sandpaper and rub over it to remove any remaining dust and debris from the area, this really ensures that the plaster holds to its place.
  4. If there is any moisture or dampness in the damaged area, you will have to stop as the plaster won’t hold its place for a long time, this needs to be examined by an expert to ensure that there isn’t any leakage in the water pipes.
  5. Check if there are any nail heads or screw heads sticking out of the area, if they are sticking out, you will have to remove them using the nail remover. If the head is butted in the wall and isn’t sticking out, you can leave it be as it won’t cause much intrusion with our process.
  6. Apply Diluted PVA to the area of the wall where you want to apply the plaster. This will really give it adhesion and this should make sure that the Plaster sticks firmly to the wall.
  7. After completing all of the above steps, the preparation that we needed to repair a plaster wall has been completed. Now, we can finally move on towards the actual task.

How To Repair Plaster Walls:

  1. Place the Spirit Level in the middle of the wall that is to be plastered and with the steel ruler mark the depth to which the plaster has been damaged. If this is greater than 3mm, you will have to use the Plaster repair Filler which can be used up to a depth of 12mm.
  2. Now, if the gap between the damaged Plaster and the new plaster is less than 3mm, apply the Plaster Repair and Skim to the Flat Plaster Tray, and from there, using your scraper, apply it directly to the wall that you are repairing.
    If the depth of the damaged Plaster was greater than 3mm and up to 12mm, you should use the Plaster Repair Filler and apply it to the damaged area using the Flat Plaster Tray and the scrapper.
  3. While using the scrapper or the Flat Plaster Tray to apply the plaster, make sure to gently apply it so that it fills up all the damaged area and no air pockets are leftover.
  4. Once the Plaster has been applied, make sure to move the Flat Plaster Tray over the area where you have applied it so that it sits evenly in the whole area.
  5. Once the Plaster has been set and you have made sure that it has evenly been spread through the damaged area, allow it some time to set.
  6. This time will depend upon the humidity, temperature, and other factors of the room but 12 Hours should be a decent amount of time to let it set. If you were repairing multiple walls or multiple damaged areas, it is best to move on towards them and start filling them up in the same manner.
  7. After all of this has been completed and the plaster has been allowed some time to set, wet the Flat Plaster Tray in the trough and move it over the plastered area to even it out some more. After this, use the Medium Grade Sandpaper and rub it over the whole area to even it out even more.
  8. Now that this whole ordeal has been completed, if you want to apply paint, wallpaper, or any other material over the plaster, make sure to use an appropriate sealer on it first to ensure that it sticks perfectly.

Using this method, you will be able to conveniently repair any damaged Plaster wall in just a few hours of time and there won’t be any need for a technician or a big bill out of your wallet. Note that this method can be used to fix any damaged plaster wall so you don’t need to worry about being more specific.

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