What Is Plaster Flaking? Why Does Plaster Flaking When Painting?
What Is Plaster Flaking?
Plaster flaking is a condition caused when the plaster used to finish the walls and ceilings of a building begins to come away from the surface beneath.
This can be due to a number of causes, including water damage, shifting supports in underlying walls or poor adhesion when originally laid.
Plaster flaking is often accompanied by peeling paint or cracked surfaces, as well as producing a powdery residue which can settle on furniture and fixtures nearby.
It is important to determine the cause of plaster flaking so that it can be dealt with appropriately; if not addressed quickly this issue can worsen and lead to more serious structural problems.
Why Does Plaster Flaking When Painting?
Painting over a wall that has plaster can cause the plaster to flake away. This occurs due to insufficient adhesion between the wall and the paint as a result of a number of underlying issues.
These include poor surface preparation, inadequate priming or under-priming, moisture present in the wall that leads to cracking between layers, and applying incorrect types of paint or painting in cold temperatures when the paint is still wet.
Cracking could also be caused by using excessive amounts of thick additives like extenders or flattening agents while mixing the paint.
It’s best to use only top quality materials and perform proper surface preparation before painting with new plaster.
What Happens If You Don’t Let Plaster Dry Before Painting?
If you don’t let the plaster dry before painting, the paint may not adhere well to the material.
Additionally, when painting over wet plaster, there is a risk of trapping moisture within the walls which could lead to bubbling or peeling paint down the line due to moisture seeping into it and expanding.
Moreover, condensation can form on top of the wet plaster if it is painted too soon and this can cause mildew formation in addition to damage to any wallpaper that has been applied too soon after painting.
Finally, an improperly dried wall will be more brittle than one that was given ample time to dry properly, leaving it more vulnerable to cracking or crumbling over time.
Can You Paint Over Flaking Paint?
Painting over flaking paint can be done, however it takes a bit of preparation to make sure that it is done correctly.
Firstly, remove the flaky paint by scraping or sanding away any loose or peeling paint. Then scrub down the wall with detergent and water to get rid of dirt and debris.
After this it’s best to use an oil-based primer designed for chalky surfaces before applying two coats of an emulsion paint in order to give your wall a good finish that lasts.
Once completed, you can enjoy your refreshed walls without the worry of further flakes occurring.