Polystyrene block – bubbling or blistering paint
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
Water-based paint coat exposed to moisture before paint has fully dried
Listed under: Exterior, finishes, plastic, paint, polystyrene, cladding, walls, moisture, wall cladding, polystyrene blocks
Cause
Loss of adhesion due to excess moisture in substrate
Repair
- wash walls if necessary; sand and repaint applying minimum two coats semi-gloss or high gloss acrylic paint
Cause
Poor initial substrate preparation
Repair
- wash walls if necessary; sand and repaint applying minimum two coats semi-gloss or high gloss acrylic paint
Cause
Oil-based (alkyd) paint applied over water-based (latex) paint
Repair
- wash walls if necessary; sand and repaint applying minimum two coats semi-gloss or high gloss acrylic paint
Cause
Surface was damp or dirty when painted previously
Repair
- wash walls if necessary; sand and repaint applying minimum two coats semi-gloss or high gloss acrylic paint
Cause
Dark colours increasing surface temperatures
Repair
- wash walls if necessary; sand and repaint applying minimum two coats semi-gloss or high gloss acrylic paint
Cause
Water-based paint coat exposed to moisture before paint has fully dried
Repair
- wash walls if necessary; sand and repaint applying minimum two coats semi-gloss or high gloss acrylic paint