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How To Repair Plaster Walls

How To Repair Plaster Walls

An expert plaster walks viewers through how to properly fix plaster walls, without over fixing it.

In this video I'm going to show you how to fill in a hole in a plastered wall. You'll normally find this in most houses, where maybe something has fallen off or the electricians have cut it out to fit their cables and stuff. So this is quite a useful exercise.

You can see that the top coat of plaster has come off, so we're going to need to fill that out. The problem that we come across is that if you don't fill it out properly, if you fill it out too thin, then you can see it and if you fill it out too much, then you're going to put a big bulge in the wall. So I'm going to show you how to carefully fill it in.

So first of all we’re going to use some finishing plaster which we mixed up earlier on.

We've wet the wall down to kill the suction and then we take this off of there and put it in the middle there like that, and just cover the area like this. An important part about this is that you need to get it in line with the existing wall, okay? So, we're going to just fill that out. It's very important that we clean these edges off, so that the plaster doesn't go over the edge of the existing wall, okay? That's why it's so good to keep it nice and wet.

Okay, this stuff doesn't want to build up too quickly, too thickly so what we do, we'll fill it out and leave it for a minute or 2 and then we'll fill it out again, all right? The most important part is to keep the edges clean. Make sure that you can still see the edges on the front of the trowel so that it blends in with the wall. Now you can see that there are 1 or 2 little holes. At this stage it's a little bit wet, so we'll just hold that down a little bit.

Let it dry out a little bit and put another coat on in just a minute or two.

So that we know that the plasters in line with the existing plaster work here, we use one of these. This is called a feather edge or straight edge, because it comes down to a point. We put this on the wall like this, and we move it up and down slowly like this. That tells us where we need to fill and what we need to fill in.

Where it's touching that mean's we don't need to fill it there, where it misses, we need to fill it in like this and use the feather edge again, once again to make sure we filled it out. When that dries up a little more, we can trowel that in a little and make that nice and smooth.