Bubbles On Wood Siding

Let the glue cure overnight.

Bubbles on wood siding.

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

To see them you have to be on an angle. If scraping alone is enough the initial. If you re getting bubbles on your new deck it s probably because your new wood hasn t. Essentially the top layer of paint dries forming a barrier that prevents the solvents from escaping easily.

Use a scraper to carefully open the paint bubble. If your siding has been treated with linseed oil in the past prime and paint with oil based products. Bubbles caused from a loss of adhesion and lifting of the paint film from the underlying surface. A moisture problem would result in unfinished wood behind the bubble.

The new paint has sealed the moisture in the wood and has bubbled up in the places where the moisture is trying to escape. The bubbles were really subtle. In a large percentage of cases when we pop the bubbles we notice the bubbles open up right to the bare wood. Prevent new blisters by applying two coats of varnish or hand rubbed wood oil on the veneer and keeping anything hot or wet off the surface.

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. 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. Inspect the inside of the bubble. What causes bubbles one of the primary causes of bubbles in any kind of finish is moisture in the wood.

Not very easy to see right away. Heat problems will result in a visible layer of paint behind the bubble. 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. This problem is far more common when paint is applied to a hot surface.