Cavity brick/concrete block veneer – peeling or flaking paint

Cause

Loss of adhesion due to excess moisture in substrate

Repair

  • scrape and/or sand off loose paint and clean until surface is sound; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of paint appropriate for masonry

Cause

Poor initial substrate preparation

Repair

  • scrape and/or sand off loose paint and clean until surface is sound; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of paint appropriate for masonry

Cause

Oil-based (alkyd) paint applied over water-based (acrylic) paint

Repair

  • scrape and/or sand off loose paint and clean until surface is sound; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of paint appropriate for masonry

Cause

Surface was damp or dirty when painted previously

Repair

  • scrape and/or sand off loose paint and clean until surface is sound; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of paint appropriate for masonry

Cause

Dark colours

Repair

  • scrape and/or sand off loose paint and clean until surface is sound; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of paint appropriate for masonry

Cause

Paint coating at the end of its serviceable life

Repair

  • scrape and/or sand off loose paint and clean until surface is sound; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of paint appropriate for masonry