- A source of water in the masonry.
- Soluble salts present within the masonry.
- A path for water to get to the surface of the masonry and evaporate.
- Eliminate source of moisture by sealing cracks, repairing missing mortar, cleaning out gutters and downspouts and caulking joints around doors and windows.
- If moisture is migrating through the wall from the outside walls, apply waterproofing to outside of wall.
- A 50% solution of vinegar and water is all that is generaly needed to remove efflorescence.
- Let the wall dry completely and paint with a high quality latex house paint.
