Concrete blockwork – peeling or flaking of paint
Listed under: Exterior, finishes, concrete and cement, concrete blocks, paint, cladding, walls, moisture, wall cladding, solid concrete blockwork
Cause
UV deterioration
Repair
- scrape and/or sand off loose paint to leave a clean, sound surface; prime; paint with a minimum two coats of paint suitable for concrete masonry
Cause
Loss of adhesion due to excess moisture in substrate
Repair
- scrape and/or sand off loose paint to leave a clean, sound surface; prime; paint with a minimum two coats of paint suitable for concrete masonry
Cause
Poor initial substrate preparation
Repair
- scrape and/or sand off loose paint to leave a clean, sound surface; prime; paint with a minimum two coats of paint suitable for concrete masonry
Cause
Oil-based (alkyd) paint applied over water-based (acrylic) paint
Repair
- scrape and/or sand off loose paint to leave a clean, sound surface; prime; paint with a minimum two coats of paint suitable for concrete masonry
Cause
Surface was damp or dirty when painted previously
Repair
- scrape and/or sand off loose paint to leave a clean, sound surface; prime; paint with a minimum two coats of paint suitable for concrete masonry
Cause
Dark colours
Repair
- scrape and/or sand off loose paint to leave a clean, sound surface; prime; paint with a minimum two coats of paint suitable for concrete masonry
Cause
Paint coating at the end of its serviceable life
Repair
- scrape and/or sand off loose paint to leave a clean, sound surface; prime; paint with a minimum two coats of paint suitable for concrete masonry