Concrete blockwork – peeling or flaking of paint

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