Bubbles On Wood Siding

Heat blistering caused by painting in direct sunlight on a surface that is too warm.

Bubbles on wood siding.

Cover the repair with wax paper and a flat wood block then clamp the blister flat. Bubbles caused from a loss of adhesion and lifting of the paint film from the underlying surface. Then remove the clamp and wax paper and lightly sand and refinish the surface. You don t say specifically whether just scraping off the bubbles reveals bare wood or whether the old paint stays intact until the painter sands it off.

The best remedy is to scrape and repaint the siding during a warm dry period so the moisture can come out of the wood and prevent future bubbles from appearing. If your siding has been treated with linseed oil in the past prime and paint with oil based products. If scraping alone is enough the initial. The bubbles were really subtle.

The new paint has sealed the moisture in the wood and has bubbled up in the places where the moisture is trying to escape. This has prompted some painters to theorize that the linseed oil had dried out in the original layers that sit on the wood and when the fresh top coat dries it pulls the old layer away from the substrate. Use a scraper to carefully open the paint bubble. If you re getting bubbles on your new deck it s probably because your new wood hasn t.

In a large percentage of cases when we pop the bubbles we notice the bubbles open up right to the bare wood. I can see how with the direction of the sun the color of the siding and the reflection from the low e glass the siding could bubble up a bit. Let the glue cure overnight. Moisture blistering can be caused by the migration of water through an interior wall to the exterior thus pushing the paint off of the surface.

A moisture problem would result in unfinished wood behind the bubble. To see them you have to be on an angle. Excess moisture on your painted walls whether from water droplets high humidity leaks or plumbing problems can cause water filled bubbles in the paint originating anywhere from the substrate. Bubbles form as the result of a chemical reaction.

Essentially the top layer of paint dries forming a barrier that prevents the solvents from escaping easily. Inspect the inside of the bubble. This problem is far more common when paint is applied to a hot surface. Not very easy to see right away.