What is Blistering?

Blistering occurs when bubbles or raised bumps form in paint, caused by trapped moisture or heat underneath. Common triggers include leaks, poor ventilation, or painting over wet surfaces. Simply repainting will not fix it; the underlying moisture source must be identified and resolved before scraping and applying new paint.

Blistering infographic showing the three-stage process — bubbles form, raised bumps develop, paint loses adhesion — plus common causes including poor ventilation, leaks and infiltration, and painting over wet surfaces, three corrective action steps of moisture diagnosis, prep work, and repainting, and ideal use cases for surface check, ventilation, and structured repair on wood, drywall, concrete, metal, and siding