Mineral Salt Contamination
What is Mineral Salt Contamination?
Mineral salt contamination is where ground based salts migrate to and become visible upon the internal surfaces of damp walls carried through the masonry by lateral, rising or penetrating damp the mineral salt is left behind as the moisture evaporates from the wall surface. Over time, as more damp migrates to the interior and evaporates, more salt builds up on the surface of the wall.

What are the signs of Mineral Salt Contamination?
- White/grey staining on external and internal wall and/or floor surfaces
- Damp patches on external and internal wall and/or floor surfaces
- Crumbling on external and internal wall and/or floor surfaces
- White/grey crystalline deposits formed on external and internal wall and/or floor surfaces
Note: Visible signs of dampness and mineral salt contamination can continue to be present after the moisture migration has been remediated and dried out given that some mineral salts can be hygroscopic and can therefor absorb atmospheric moisture.