Wall Painting Tips: There are several reasons why small pits or holes form on a painted surface. This happens when the wall surface is not properly prepared and paint is applied directly over it.
Causes of small holes and pits in wall paint
Why Tiny Holes Appear on Painted Walls: After a fresh coat of paint, everything looks clean and beautiful for a while. But sometimes, after a few months, tiny holes, tiny pits, or raised marks begin to appear on the paint surface. Initially, these are so small that they go unnoticed. Gradually, their number increases, and the wall's overall finish begins to look damaged.
People often assume that the wall is damp when they see such marks. However, it's not always caused by dampness. Improper paint preparation, air entrapment, moisture, poor plaster, and poor bonding between layers of paint can also cause this. Simply repainting the surface isn't a permanent solution.
Why do small holes start forming on the wall?
There are several reasons why small pits or holes may appear on a painted surface. When the wall surface is not properly prepared and paint is applied directly over it, the paint does not adhere firmly to the wall. Dust, dirt, or old, weak paint layers on the wall can affect the adhesion of the new paint. Sometimes, air gets trapped beneath the paint layer. Over time, these small air pockets can appear as small pits or bumps on the surface. If the wall was not completely dry before painting, the problem can be exacerbated.
Apart from dampness, moisture can also be the reason.
Moisture on the wall is a major cause of small holes and poor paint finishes. It's not always necessary for a wall to be severely damp. Excessive humidity or steam in a room can also affect the wall surface. This problem is more common in areas like kitchens and bathrooms, especially when the room lacks proper ventilation. Trapped moisture within the wall or beneath the paint layer can gradually weaken the paint's adhesion, resulting in small pits, bubbles, or peeling.
Also check for water leaks from pipes or the roof.
Sometimes, visible defects on a wall are related to nearby plumbing. A small leak in a water pipe within the wall, water seeping down from the roof, or moisture seeping in from around windows and balconies can gradually affect the paint surface. In such cases, simply repainting the affected area may temporarily conceal the problem, but if the leak persists, the same marks may reappear.
Bad plaster can also be the reason.
If the plaster underneath a wall is weak, old, or uneven, the paint applied over it won't provide a lasting finish. Small holes, cracks, or loose areas in the plaster will become visible on the paint surface. Similarly, if the wall isn't properly primed and puttyed before painting, the paint layer won't adhere properly to the wall. Over time, small pits or roughness may appear.
Proper bonding between paint layers is essential
Sometimes a new coat of paint is applied over an old coat, even though the old surface is weak. Using different types of paint can also weaken the bond between the two coats. Therefore, before painting, it's important to remove the old, damaged coat, clean the wall, and apply a primer as needed. This will improve the adhesion of the new paint and reduce pitting and peeling.
Don't just paint over small holes.
If you notice small holes or pits on your wall, first try to determine their cause. Carefully examine the wall for signs of moisture, stains, peeling paint, or cracks.
