Bubbles On Wood Siding

To see them you have to be on an angle.

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. 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. 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.

What causes bubbles one of the primary causes of bubbles in any kind of finish is moisture in the wood. If scraping alone is enough the initial. Heat problems will result in a visible layer of paint behind the bubble. Bubbles caused from a loss of adhesion and lifting of the paint film from the underlying surface.

Inspect the inside of 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. The new paint has sealed the moisture in the wood and has bubbled up in the places where the moisture is trying to escape.

If you re getting bubbles on your new deck it s probably because your new wood hasn t. 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. A moisture problem would result in unfinished wood behind the bubble. 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.

Then remove the clamp and wax paper and lightly sand and refinish the surface. Cover the repair with wax paper and a flat wood block then clamp the blister flat. If your siding has been treated with linseed oil in the past prime and paint with oil based products. Let the glue cure overnight.

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. Bubbles form as the result of a chemical reaction. Use a scraper to carefully open the paint bubble.