The Brew Cabin

My son put road salt down on his clay block paving during the winter, and despite pressure washing, when ever it dries we are left with the white salt marks on the blocks. Any suggestions.....Thx

The salt should have washed away long ago. I can't understand why you are still seeing a residue.

The key reason we warn against using salt on concrete paving is because the salt actively corrodes the surface, and, in extrme circumstances, can destroy the blocks. You may have heard about 'concrete cancer' affecting motorway bridges and caused by rwinter salt spreading.....this is exactly the same thing.

Repeated washing, using warm water or, as a last resort, a power washer, *should* shift any remaining residue.