How to prevent exterior paint from bubbling?
by
Meagan Brown
+3
We have scraped and primed our cedar siding. After applying 1 coat of paint there are spots that are bubbling. Looks like a big air bubbly when the sun shines on it and when it cools it sucks back down. How do we avoid this from happening????
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Call your distributor where you bought your paint. It sounds like you maybe painting a latex over old oil paint or stain.
I have a similar problem and would love to see possible solutions.
It’s all about the moisture in the wood. When the sun warms up the surface of the wood it causes the water underneath the turn into vapor which forms the gas that causes the bubble
There are many resources that talk about this problem on the Internet. Moisture causes the bubbles. Paint forms a membrane on the wood.when the membrane doesn’t allow for the water vapor to escape the paint membrane bubbles up. I solved my problem by allowing very thin coats of paint. Only after the first thin coat was good and dry. I’m talking days here in Pennsylvania, then another thin coat. So in your particular case.. The wood could be too wet. Or you’re not allowing sufficient time to dry between coats. It would be interesting to know. Did the paint separate from the primer or did the primer separate from the wood ?