If you are looking for the best guide on how to repair peeling paint on plaster walls, then you are on the right page. Cracks are a frequent disturbance factor in both new and old buildings. As a rule, small cracks are completely harmless. Read on and know how to repair this painting issue.
How to Repair Peeling Paint on Plaster Walls
Keep in mind that there is a difference between cracks that plaster causes, and cracks that plaster base causes. Plaster-related cracks are small hairline cracks that only affect the interior plaster. They are usually narrower than 0.2 millimeters.
On the other hand, cracks that plaster base causes are usually wider than 0.2 millimeters, and can indicate a problem in the foundation.
As a rule: If the crack is wider than 0.2 millimeters, consult a specialist who will take a close look at the cracks to be sure. Moreover, small hairline cracks need not worry you.
How Do Cracks Appear In The Wall?
The causes of cracks in interior plaster are many and vary. One-time shifts occur when the walls sink a little – this can happen after renovations or after an earthquake.
However, it is more likely that cracks in the interior plaster will occur because of the building materials underneath. For example, if it is wood, it contracts or expands – depending on the humidity.
Cracks in the wall also occur in places where the building materials encounter vibrations. This is the case on stairs and door frames, for example.
How to Repair Peeling Paint on Plaster Walls – The Best Way to Proceed
Hairline cracks are very small cracks in the interior plaster: In most cases they are not very noticeable, but they are still an optical problem. That is especially if you want to paint the plaster directly and do not want to wallpaper it first.
To repair the small cracks in the wall, use conventional filler. The package tells you exactly how much water you need to mix the filler. For quick application, there is also ready-to-use crack and fill compound in tubes.
It is important that you first widen the crack a little so that the compound can be pressed deep into it. You can do this with the tip of a slotted screwdriver.
Now, take a spatula and apply the mass in such a way that you completely fill the crack. Then, simply scrape off the excess putty with the putty knife. Make sure that the surface is as smooth as possible.
Use the compound sparingly so that the area you repair is almost invisible. Then you can level the area by applying the same plaster as the rest of the wall – for example roughcast. If you do not have any special plaster, you can also paint directly over the filler.
How to Repair Peeling Paint on Plaster Walls – Repair Cracks In The Plaster With Acrylic
Sometimes it is not enough to fill the cracks: They would only reopen after a certain amount of time. If vibrations or the expansion and contraction of building materials cause the cracks, you need an elastic repair compound that adapts to the movements.
The acrylic masses and similar products are available in cartridges, over the tip of which you can simply inject the material into the crack.
Tip: If it is too small, you can also use a fine brush to repair cracks in the interior plaster. Simply wipe off excess material with a paper towel.
If the material is now working, the jointing compound allows movement and will not crack. Again, it is important that you first widen the crack before you press in the acrylic compound, so that you fill the crack completely.
However, it is important that you now choose the right color for painting over. This must also be elastic, otherwise it will crack over the repair compound and you will have a blemish again.
Brittle paints are not elastic and therefore not suitable – this includes mineral paints. So pay attention to the label on the packaging and if in doubt, ask a specialist.