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Old 12-28-2010, 06:52 PM   #1
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exterior paint blistering on wood


What would cause paint to bubble or blister on exterior facia wood

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Old 12-28-2010, 07:03 PM   #2
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exterior paint blistering on wood


One reason is when painting in direct sunlight or on a hot surface this will entrap the vapors as the paint dries too fast. These vapors expand, causing small to medium sized bubbles under the top layer of paint.

Another reason to cause paint bubbles is moisture coming from inside or outside. Unlike the bubbles associated with heat, moisture bubbles penetrate through all layers of paint, into the surface. The moisture becomes trapped, therefore expanding the paint film. Inside moisture is due to leaks from the house, perhaps because of plumbing problems. Outside moisture can come from precipitation. The bubbles may appear within a few hours or may take as long as a few days to pop up.


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Old 12-29-2010, 03:59 PM   #3
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exterior paint blistering on wood


Quote:
Originally Posted by epson View Post
One reason is when painting in direct sunlight or on a hot surface this will entrap the vapors as the paint dries too fast. These vapors expand, causing small to medium sized bubbles under the top layer of paint.

Another reason to cause paint bubbles is moisture coming from inside or outside. Unlike the bubbles associated with heat, moisture bubbles penetrate through all layers of paint, into the surface. The moisture becomes trapped, therefore expanding the paint film. Inside moisture is due to leaks from the house, perhaps because of plumbing problems. Outside moisture can come from precipitation. The bubbles may appear within a few hours or may take as long as a few days to pop up.

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