Now You Can Fix Paint Bubbling on Your Own

Now You Can Fix Paint Bubbling on Your Own

Blisters or bubbles can appear in exterior or interior paint. And it is also one of the top paint problems. Depends on the severity, you can either fix it by yourself or you need professional house painter Melbourne help. In this article, we will help you to fix this problem.

You might wonder what causes paint to blister or bubble? Both heat and humidity could be the cause. For exteriors, bubbles can appear when painting in direct and intense sunlight or on overly hot surfaces. A latex paint that is newly dried and exposed to wind, rain, or high humidity may also blister. Moisture from bathrooms, kitchens, cellars and laundry rooms can be removed from the surface in interiors, passing through the walls. Oil paint is also vulnerable to blisters if applied over a damp surface or water-based (latex) paint. Failure to paint over a dirty surface, eschewing and improper techniques are also causes of blistering.

Before you do any reparation, first asses the cause by burst a few bubbles and examine the backside of blistered paint, as well as the substrate if it becomes exposed. It will tell whether moisture or heat is the culprit.


  1. If the bubbles appear in several coats of paint and bare substrate reveals when you pop it, there’s a moisture issue. You can solve this issue by repairing plumbing, replacing caulking, and/or increasing ventilation as required. Then remove all blistered paint, sand smooth, clean, prime, and repaint.
  2. If the blisters only affect the previous coat of paint, then it is most likely caused by heat. To solve this, first remove blisters and the underlying paint or primer then use sandpaper to smooth and dull the surface. Before you continue to clean, prime and repaint, make sure that the surface is cool enough (below 32celcius).

To prevent bubbles and blisters to happen,

  1. Use a wooden stirrer or drill attachment and stir the paint slowly and briefly. Stirring too quickly or for too long can create bubbles that could transfer to the surface.
  2. Be patient and roll in moderate speed. If you detect bubbles during application, you might roll to fast so slow down.
  3. Ideally, stick to one formula to avoid blistering: latex over latex and oil over oil. While it’s possible to successfully apply latex paint over oil-based primers and paints if necessary, you should try to avoid doing so as it’s likely to lead to blistering.

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