Paint With Confidence

Exterior Common Issues & Solutions

Blistering

Text & image courtesy of the Rohm & Haas Paint Quality Institute

Blistering

Bubbles resulting from localized loss of adhesion and lifting of the paint film from the underlying surface.

Possible Cause

  • Painting a warm surface in direct sunlight.
  • Application of oil-based or alkyd paint over a damp or wet surface.
  • Moisture escaping through the exterior walls (less likely with latex paint than with oil-based or alkyd paint).

Solution

  • If blisters go down to the substrate, try to remove the source of moisture. Repair loose caulking; consider installing an exhaust fan. Remove blisters (see below).
  • If blisters do not go all the way down to the substrate, remove them by scraping, then sanding; prime any bare wood and repaint with a quality exterior paint.