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Blasted Blisters – Preventing And Repairing Exterior Paint Blisters

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Few things are as frustrating as finishing a project around your house to look back at it and find that something has gone horribly wrong. One perfect example of this is paint blistering. If you have recently painted your home and have found the paint to be bubbling, or blistering in areas, you can fix it. If you are planning to paint the exterior of your home and want to avoid this issue, you can prevent it. Here, you will learn how to do both.

What causes exterior paint to blister?

There are four main causes of exterior paint blistering. These include:

  1. Dirt – If you haven't taken the time to thoroughly clean the walls before painting them, the fresh paint could begin to blister soon after you are done. Pressure wash all of the walls that you are painting and cover the ground directly below where you are working. Any dirt or dust that is on the walls could cause the paint to blister.
  2. Moisture – If you didn't allow enough time for the walls to completely dry after washing them, after a rain, or after the morning dew has settled on them, you will likely be dealing with blisters soon after your paint has dried.
  3. Humidity – Wait for a day in which the humidity levels are low. The humidity in the air can cause the same moisture issues as walls that haven't dried completely before painting. The humidity levels must remain low long enough for the paint to fully dry.
  4. Wrong Type of Paint – If the existing paint on your home is latex, you should use latex paint for this fresh paint job. If you attempt to use oil based paint on top of latex, blistering, cracking and peeling will occur. If you prefer to use oil based paint for this fresh paint job, apply a coat of special primer before applying the paint.

How do you repair paint blisters?

To repair the areas that have blistered, you will need to scrape away the paint from the area using a putty knife. Once you have removed the blisters, use sandpaper to smooth the surface. Use a damp cloth to wipe away the dust that remains after sanding.

Wait until you have a clear, low-humidity day to apply a fresh coat of primer and then a coat of paint.

Hopefully, you can avoid the mistakes listed above and prevent the need to make the repairs. Fortunately, making the repairs is a fairly easy, but aggravating project for you to do. For more information, contact companies like Northwest House Painting


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