Common problems

What kind of soiling
is troubling you?

For each symptom, we have set out the possible causes, what we check on site, and what can and cannot be done.

Soiled exterior walls and black rain streaks

Black streaks run vertically down from under windows or copings. Even after washing, they come back to the same place after a while.

Darkened entrance tiles

Scrubbing with a brush or changing detergents does not remove the darkening on the entrance tiles.

Stains and oil marks on marble and granite

Marks from spilled oil or drinks stay inside the stone and do not go away.

Black stains around sealant

Along the sealant of windows and joints, black stains spread into the stone or tile.

Mold, moss and algae on exterior walls and grounds

Green or black growth spreads on north-facing walls, fences, and floors that get no sun.

White powder and white marks (efflorescence)

White powder or white streaks rise to the surface of stone, tile or concrete.

Even if none of these matches, you are welcome to ask us. Contact us