Lightweight aerated concrete – bubbling or blistering paint
Lightweight aerated concrete panels/blocks – 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
Cause
Loss of adhesion due to excess moisture in substrate
Repair
- ensure surface is dry; sand and repaint, applying a minimum two coats of semi-gloss or high gloss acrylic paint
Cause
Poor initial substrate preparation
Repair
- ensure surface is dry; sand and repaint, applying a minimum two coats of semi-gloss or high gloss acrylic paint
Cause
Oil-based (alkyd) paint applied over water-based (latex) paint
Repair
- ensure surface is dry; sand and repaint, applying a minimum two coats of semi-gloss or high gloss acrylic paint
Cause
Surface was damp or dirty when painted previously
Repair
- ensure surface is dry; sand and repaint, applying a minimum two coats of semi-gloss or high gloss acrylic paint
Cause
Dark colours increasing surface temperatures
Repair
- ensure surface is dry; sand and repaint, applying a minimum two coats of semi-gloss or high gloss acrylic paint
Cause
Water-based paint coat exposed to moisture before paint has fully dried
Repair
- ensure surface is dry; sand and repaint, applying a minimum two coats of semi-gloss or high gloss acrylic paint