A plasterer would typically fix a hole in the wall using the following steps:
Prepare the hole: The plasterer will remove any loose debris and debris around the hole. If the hole is large, they may need to install a backing board to provide a stable surface for the repair.
Mix the plaster: The plasterer will mix the plaster to the right consistency according to the manufacturer’s instructions.
Apply the plaster: The plasterer will apply the plaster to the hole, using a trowel to smooth and shape the plaster. They will work in small sections and ensure that the plaster is pressed firmly against the wall to create a strong bond.
Sand and finish: After the plaster has dried, the plasterer will sand the surface to smooth out any imperfections and to ensure that the repair is flush with the surrounding wall. They will then apply a final coat of plaster and smooth it out with a trowel.
Paint or paper: Once the plaster is dry, you can paint or paper over the repair to match the surrounding wall.
After plastering, you should typically wait at least 24 hours before painting (or papering) over it. This allows the plaster to fully dry and set, which will ensure that the paint adheres properly and dries evenly. If the plaster is still wet or not fully set, the paint may not adhere properly or may dry unevenly, resulting in an unsightly finish. It’s also important to note that, if the plastering is done in a humid environment, the drying time may be longer. In this case, it’s best to check with a plastering professional or the manufacturer’s recommendations before painting.
It’s important to note that the size of the hole and the type of plaster used will determine the techniques and tools needed for the repair. If the hole is small and in a drywall, a patching compound can be used to repair the hole, if the hole is larger or in a plaster wall, the plasterer may need to use a different technique.
It’s also important to note that if the hole is caused by a structural problem or a plumbing problem, it is necessary to address the problem before fixing the hole, otherwise the problem will persist.