Cracks along the joints between/ in the block wall and reinforced concrete elements.
Why it happens:
- Different materials expand and contract with temperature changes. Over time, this differential movement will result in cracks along the joints
- For hairline cracks: re-paint the wall with a flexible sealant/ elastomeric paint to seal the cracks
- For wider cracks: engage a contractor to carry out the repair works
- Facilitate cross-ventilation in the flat
- Re-paint the walls regularly