Salt contamination

What's happening?

White fluffy or crystalline deposits on plaster and masonry, often left behind after damp has evaporated from the wall surface.

Possible causes

• Hygroscopic salts carried by rising damp
• Chimney breast salts from combustion
• Contaminated plaster remaining after remedial works

What type of specialist may be required?

Remedial plastering specialist working alongside a damp surveyor, using salt-retardant render systems.

What should you do next?

1. 1.Do not simply repaint over the affected plaster
2. 2.Ask the specialist how the salts will be dealt with
3. 3.Confirm any guarantee covers the replastering