Bubbles On Wood Siding

Bubbles form as the result of a chemical reaction.

Bubbles on wood siding.

Use a scraper to carefully open the paint bubble. Cover the repair with wax paper and a flat wood block then clamp the blister flat. 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. 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.

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. Heat blistering caused by painting in direct sunlight on a surface that is too warm. If you re getting bubbles on your new deck it s probably because your new wood hasn t. To see them you have to be on an angle.

This problem is far more common when paint is applied to a hot surface. 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. Heat problems will result in a visible layer of paint behind the bubble.

If scraping alone is enough the initial. A moisture problem would result in unfinished wood behind the bubble. Then remove the clamp and wax paper and lightly sand and refinish the surface. Bubbles caused from a loss of adhesion and lifting of the paint film from the underlying surface.

In a large percentage of cases when we pop the bubbles we notice the bubbles open up right to the bare wood. What causes bubbles one of the primary causes of bubbles in any kind of finish is moisture in the wood. If your siding has been treated with linseed oil in the past prime and paint with oil based products. Essentially the top layer of paint dries forming a barrier that prevents the solvents from escaping easily.

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. 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. Let the glue cure overnight. Inspect the inside of the bubble.