Bathroom Tile and Grout Cleaning in Ontario
Ontario's hard water — particularly in the GTA and throughout the Great Lakes watershed — creates specific challenges for bathroom tile and grout maintenance that softer-water regions (like coastal BC) don't face to the same degree. Hard water leaves calcium and mineral deposits on tile surfaces and inside grout lines that require specific cleaning approaches.
Hard Water Deposits
The characteristic white or off-white scaling on bathroom tile, shower glass, and faucets is calcium carbonate — a mineral deposit left behind when hard water evaporates. In Ontario homes with particularly hard municipal water (the GTA's water hardness ranges from moderate to high), this buildup happens quickly on shower walls and in the tub.
- Acidic cleaners dissolve calcium deposits — white vinegar, citric acid-based cleaners, or commercial descalers. The acid reacts with the calcium carbonate and dissolves it. This is the professional approach
- Avoid abrasive scrubbing on natural stone — if your bathroom tile is natural stone (marble, limestone, travertine), acidic cleaners can etch the surface. Use pH-neutral cleaners and gentle methods
Grout Mould
Grout mould is the other major bathroom cleaning challenge in Ontario homes. The combination of moisture from showers and baths, organic material in soap scum, and the porous surface of grout creates ideal conditions for mould growth — particularly in less-ventilated bathrooms.
- Bleach is effective on mould in grout, but use it carefully: dilute (10:1 water to bleach ratio), ensure ventilation, avoid contact with coloured grout which can bleach to white
- Hydrogen peroxide (3%): A safer alternative that's effective on light to moderate mould. Apply, let sit 10–15 minutes, then scrub with a stiff grout brush
- Prevention: Ventilation is the best mould prevention — ensure your bathroom exhaust fan is running during and 15+ minutes after every shower