Bitumen-impregnated cladding – bubbling or blistering
Bitumen-impregnated corrugated fibre cladding – bubbling or blistering
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
Swelling/shrinkage caused by moisture absorption into the substrate
Water-based paint coat exposed to moisture before paint has fully dried
Listed under: Exterior, finishes, paint, cladding, walls, moisture, wall cladding, bitumen-impregnated corrugated fibre
Cause
Loss of adhesion due to excess moisture in substrate
Repair
- scrape and/or sand off loose paint; sand until surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with minimum two coats semi-gloss or high gloss acrylic paint
Cause
Poor initial substrate preparation
Repair
- scrape and/or sand off loose paint; sand until surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with minimum two coats semi-gloss or high gloss acrylic paint
Cause
Oil-based (alkyd) paint applied over water-based (latex) paint
Repair
- scrape and/or sand off loose paint; sand until surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with minimum two coats semi-gloss or high gloss acrylic paint
Cause
Surface was damp or dirty when painted previously
Repair
- scrape and/or sand off loose paint; sand until surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with minimum two coats semi-gloss or high gloss acrylic paint
Cause
Dark colours increasing surface temperatures
Repair
- scrape and/or sand off loose paint; sand until surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with minimum two coats semi-gloss or high gloss acrylic paint
Cause
Swelling/shrinkage caused by moisture absorption into the substrate
Repair
- scrape and/or sand off loose paint; sand until surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with minimum two coats semi-gloss or high gloss acrylic paint
Cause
Water-based paint coat exposed to moisture before paint has fully dried
Repair
- scrape and/or sand off loose paint; sand until surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with minimum two coats semi-gloss or high gloss acrylic paint