- Trapped moisture or solvent beneath the surface
- Painting in direct sunlight or on a hot surface
- Applying paint to a dirty, oily or chalky substrate
- Dew, humidity or rain exposure before the paint film cures
Causes:
RECOMMENDED SOLUTIONS
- Identify and eliminate the moisture source before repainting. Check for leaks, condensation or trapped water in siding or wood.
- If blisters go down after drying, they may not need removal. If they remain, scrape and sand them until smooth.
- Clean all surfaces with a mild detergent to remove dirt, oil or chalk.
- Paint during optimal weather conditions — avoid direct sun, extreme heat or painting right before rain or dew.
- Always follow recommended dry and cure times before recoating or exposing the surface to moisture.
