Concrete wall – bubbling or blistering paint
Causes
Loss of adhesion due to excess moisture in substrate
Poor initial substrate preparation
Oil-based (alkyd) paint applied over water-based (latex) paint
Surface was damp or dirty when painted previously
Dark colours increasing surface temperatures
Water-based paint coat exposed to moisture before paint has fully dried
Listed under: Exterior, finishes, concrete and cement, paint, cladding, walls, moisture, wall cladding, solid concrete wall
Cause
Loss of adhesion due to excess moisture in substrate
Repair
- a high moisture content in the concrete must be addressed before repainting
- scrape and/or sand off loose paint; clean until surface is sound. Allow to dry thoroughly then repaint with a system suitable for concrete
Cause
Poor initial substrate preparation
Repair
- a high moisture content in the concrete must be addressed before repainting
- scrape and/or sand off loose paint; clean until surface is sound. Allow to dry thoroughly then repaint with a system suitable for concrete
Cause
Oil-based (alkyd) paint applied over water-based (latex) paint
Repair
- scrape and/or sand off loose paint; clean until surface is sound. Allow to dry thoroughly then repaint with a system suitable for concrete
Cause
Surface was damp or dirty when painted previously
Repair
- a high moisture content in the concrete must be addressed before repainting
- scrape and/or sand off loose paint; clean until surface is sound. Allow to dry thoroughly then repaint with a system suitable for concrete
Cause
Dark colours increasing surface temperatures
Repair
- scrape and/or sand off loose paint; clean until surface is sound. Allow to dry thoroughly then repaint with a system suitable for concrete
Cause
Water-based paint coat exposed to moisture before paint has fully dried
Repair
- a high moisture content in the concrete must be addressed before repainting
- scrape and/or sand off loose paint; clean until surface is sound. Allow to dry thoroughly then repaint with a system suitable for concrete