Earth construction – peeling or flaking surface finish

Cause

UV deterioration

Repair

Cause

Loss of adhesion due to excess moisture in substrate

Repair

  • consult an earth building specialist
  • scrape and/or sand off loose paint; clean until surface is sound; allow to dry thoroughly; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint suitable for the plaster finish

Cause

Poor initial substrate preparation

Repair

  • consult an earth building specialist
  • scrape and/or sand off loose paint; clean until surface is sound; allow to dry thoroughly; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint suitable for the plaster finish

Cause

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

Repair

  • consult an earth building specialist
  • scrape and/or sand off loose paint; clean until surface is sound; allow to dry thoroughly; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint suitable for the plaster finish

Cause

Surface was damp or dirty when painted previously

Repair

  • consult an earth building specialist
  • scrape and/or sand off loose paint; clean until surface is sound; allow to dry thoroughly; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint suitable for the plaster finish

Cause

Dark colours

Repair

  • consult an earth building specialist
  • scrape and/or sand off loose paint; clean until surface is sound; allow to dry thoroughly; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint suitable for the plaster finish

Cause

Paint coating at end of its serviceable life

Repair

  • consult an earth building specialist
  • scrape and/or sand off loose paint; clean until surface is sound; allow to dry thoroughly; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint suitable for the plaster finish