Bleach treats the symptom. We remove the wet wall it grows on.
If your Berlin tub surround grows black grout no cleaner defeats, the problem is behind the tile, not on it: water wicking through failed grout into drywall or greenboard that was never meant to get wet. Painting over it with 'mold paint' or re-caulking buys months. The fix is a half-day of honest demo — open the wet section, dry and treat the framing, rebuild on cement board and membrane — then tile that never feeds mold again.
Kensington's older baths still run the original 4x4 wall tile over plaster, usually with a failing caulk line at the tub. The ranch baths are fiberglass tubs with surround panels yellowed at the seams — the classic re-tile trigger. Berlin's most common call: a fiberglass surround gone yellow and chalky around a perfectly good tub — re-tile the walls, keep the tub. Bring us the smell and the stains; we will bring the meter and tell you the truth, including when the truth is 'just re-caulk it.'
Surround tile we set most in Berlin — each suits different baths and budgets.
Dense, wipeable, the value default.
Calm modern walls, fewer joints.
Plumbing-wall art that costs little.
Pattern, grip and vintage charm.