Why Is the Paint on My Wall Bubbling?

The paint on your walls can start to bubble for myriad reasons. The most common include but are not limited to:

• Dirt and grime beneath the paint. It’s in your best interest to try and clean your walls before you paint them. If dust or other materials get stuck beneath your new paint job, it’s possible that the paint you lay down will start to pull away from the wall, leaving bubbles in its wake.
• A lack of primer. It can be tempting to skip over the process of priming your basement walls, especially if you’re in a hurry to finish up your basement. Unfortunately, doing so leaves your paint in contact with concrete and other materials when they’re at their most porous. As such, that paint can be more readily absorbed into your supporting materials. If the paint doesn’t stick in the first place, it can begin to lift away from the walls of your basement in little to no time at all.
• Excessive amounts of moisture in the air. Moisture can cause paint to pull away from the walls in your basement. Not only that, but high levels of humidity in your home can also cause mold clusters to develop between a layer of paint and your wall’s structural material. As such, bubbles can both be the paint pulling away from the concrete of the wall and the hint of a mold presence in your home.
• Excessive heat. If the bubbles in your paint job start to appear shortly after you finish your paint job, take a look at the temperature. It is possible for paint to start to blister if it is exposed to high temperatures on an overly consistent basis. To fix a heat-induced bubbling paint job, you’ll want to remove the paint bubbles on the wall, prime and paint the surface again, and use your HVAC system to better control the temperature in your basement.
• Inappropriate roller cover usage. At the end of the day, it is possible that you used an inappropriate roller cover or nap length when applying your paint to your walls. You’ll want to check in with representatives at your local hardware store to determine what type of roller cover and nap length may best suit the walls in your basement if you want to avoid this problem.