How to Fix Paint Bubbles on Walls
Quick Answer
Scrape off bubbled paint, sand the area, apply a stain-blocking primer, and repaint with a quality paint.
How to troubleshoot Paint Bubbles on Walls
Paint bubbles are caused by moisture or poor adhesion. This guide covers removing the bubbled paint, priming, and repainting the area.
Step-by-Step Fix
- Scrape away all bubbled and peeling paint using a paint scraper.
- Sand the edges smooth with fine-grit sandpaper and wipe away dust.
- Check for any moisture source; fix leaks before repainting.
- Apply a stain-blocking or moisture-resistant primer to the bare area.
- Allow the primer to dry, then apply a topcoat of paint matching the wall colour.
- Allow adequate drying time between coats.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| Bubbles reappear | Moisture still present | Address the underlying moisture issue (leak, condensation, etc.). |
| Patch shows through | Not enough coats or mismatched texture | Apply additional coats and use a roller to match the wall texture. |
Frequently Asked Questions
Can I paint over bubbles without scraping?
No, you must scrape and sand for a lasting repair.
What causes paint to bubble?
Moisture, heat, or applying paint over a dirty or greasy surface.