Instead, the best means to remove the bubbles is to first identify what caused them and address the problem to prevent it from ruining your next coat. The following factors are the most common culprits for bubbling paint and, therefore, smart places to start. Many frustrating paint problems can be prevented by understanding the causes, some minor prep work, and the right tools.
Ever wonder why the first step of painting a room often involves cleaning the wall? Dust , dirt, and grime inevitably collect on interior walls and ceilings over time, and fresh paint has difficulty adhering to surfaces clogged with these loose particles.
As the new paint dries and, to some extent, shrinks, it will lift up from soiled areas of the surface and forms unsightly bubbles around specks of grime. These are examples of those confined to the topcoat, i.
Solution : You can course-correct using the scraping-and-patching technique outlined in the last section of this article. Then, to prevent paint from blistering in the future, thoroughly clean the surface with a sponge dampened with soapy water followed by a dry rag.
Let the surface air-dry completely before applying primer and paint to the patched areas. Porous substrates like bare drywall or plaster absorb more of both the pigments and resins binders found in the paint than substrates that have been sealed with primer.
As a result, your base coat of paint will have a thinner binder film than necessary for the next paint coat to stick to. Solution : If you notice paint bubbles after a primer-free paint application, remove the bubbles using the scraping-and-patching technique outlined below, clean the surface of joint compound dust and other debris, then apply a stain-blocking primer to the surface before re-painting it.
Either oil-based or latex primer will do; pick yours to match the type of paint you plan to roll on afterward. It can be corrected, but the underlying cause of the problem must be addressed or it will recur. Our contractor professionals can support your educational needs, provide product and color support, and help you grow your business.
Toggle navigation button. Why Does Paint Bubble or Blister? Painting a damp, dirty, or hot surface Applying oil-based or alkyd paint over latex paint Improper surface preparation Excessive moisture Exposing latex paint to moisture shortly after paint has dried How to Prevent Paint from Bubbling Make sure the surface is clean and dry Apply primer-sealer over any stains and let it dry completely Prime new joint compound with latex primer Avoid painting in hot or humid conditions Let paint dry completely before exposing the surface to moisture Consider installing vents or exhaust fans in humid areas How to Fix Paint Bubbles If the blisters do not go all the way down to the substrate, remove them by scraping and sanding.
Once the problem area has a smooth finish, coat with primer before applying a quality acrylic latex interior paint. Shaking a paint can, or stirring it too vigorously introduces air into the paint that can cause foaming, as can using old or low-quality paint.
Applying paint too rapidly or using the wrong roller also creates tiny bubbles on the wall. Finally, painting over a porous surface can also allow bubbles to form.
The secret to an effective paint job lies in preventing bubbles from forming at all. Instead of shaking the paint can, stir it with a paint-stirring stick.
If you must use a drill with a paint-stirring bit to stir your paint, operate the drill at a low setting to help keep air out of the paint. The Benjamin Moore Company advises throwing paint away if it's over a year old and investing in new paint to help avoid bubbles. Some bubbling and foaming occurs due to the thin consistency of low-quality paint.
If you experience bubbles when using cheap paint, try switching to a slightly more expensive product. A sealer or primer can also reduce bubbling, especially when working on porous surfaces. As you apply paint, slow down if you notice bubbles forming, as rolling paint too rapidly introduces excess air.
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