White stains, crumbling plaster, and unsightly mold often point to saltpetre, a problem caused by moisture seeping through walls. If left untreated, it can damage your home and create unhealthy living conditions. The good news? With the right approach, you can remove it and prevent it from returning.

Why Saltpetre and Mold Build Up

Saltpetre is caused by moisture rising through walls (often from leaks, poor drainage, or high humidity). The water carries soluble salts, which crystallize on the surface as it evaporates. Mold appears in these damp conditions, feeding on organic material in plaster or paint.

Signs to watch for: