Floor Finish Bubbles

Below we ll look at the causes and find out how to prevent these issues.

Floor finish bubbles.

After the floor finish has hardened enough to sand it refinishers pass over it with a floor buffer fitted with a 120 or 150 grit sanding screen to remove bubbles before applying another coat. As such it is only effective with polyurethane finishes. While blisters and bubbles may look similar they re unsightly either way their causes are quite different. In the sun a few spots of the finish have bubbled and cracked.

If you missed the bubbles while the varnish was fresh you may find the finish mottled with tiny craters or hardened bubbles. The process is called screening and it s one you can use on any existing finish not just a new one. I would contact the installer and manufacturer. Bubbles where sun hits laminate floor.

Unfortunately the formation of blisters and bubbles in an industrial floor coating is a fairly common problem. Screening is another option. Causes of floor coating blisters. This happens to floor finishers who drag the finish applicator aggressively and then must stay off the floor until the finish dries.

What would you do. Carefully remove the finish clean the space let it dry then apply two to three new coats of finish until the color of the finish matches the rest of your floor. This method gets rid of the finish without removing any of the wood beneath. Outgassing is a site condition that allows air or gas from the concrete substrate to escape in excess and cause blisters craters bubbles or pinholes.