Bubbled paint on exterior walls.

Questions & AnswersCategory: Paint Types and Paint ProblemsBubbled paint on exterior walls.
Rebecca asked 10 years ago

We have sanded back our weatherboard house, then used an oil based primer followed by water based top coat. We are now seeing everywhere we have primed lots of bubbling paint. What is this from and how do we fix it?

3 Answers
JT Creations, LLC answered.

I apologize in advance for not answering this question with a definite answer. I too, in over 30 years in the paint business have had this happen and have never had a conclusive answer.

I have tried making sure the weatherboard had sufficient backside ventilation. I have tried both alkyd and latex finishes. I have tried everything I can think of to no avail. If you purchased the paint at a paint store, ask them for their help.

Anonymous answered.

Should have used acrylic latex primer or conversely an oil base topcoat…Unfortunately topcoat s/b removed.

Anonymous answered.

Try using Zinnzer uc sealer and then a oil based undercoat and oil based top coat.