Our water is hard
Most of the valley's water comes from the Colorado River through Lake Mead, and it carries a lot of dissolved minerals, mainly calcium and magnesium. That's what "hard" means. You see it on faucets, shower doors and in the kettle. Your stone sees it too.
What it does to travertine and marble
When hard water evaporates on stone, the minerals stay behind:
- Haze and spots on floors near sinks, showers and the dog bowl
- Scale on shower walls and floors that builds up layer on layer
- Minerals in the holes and pores of travertine, especially outdoors where sprinklers and pool splash dry in the sun
- White crust near pool coping and drains
The cleaning trap
Hard-water deposits dissolve in acid, and so does travertine. They're chemically very close. So the products that work great on a glass shower door (vinegar, lime-scale removers, many "bathroom" sprays) also eat into the stone. You get the scale off and leave dull, etched spots behind.
What to do instead
- Squeegee or towel off showers after use. It's boring, and it works.
- Use a pH-neutral stone cleaner for regular cleaning.
- Wipe up water around sinks and pet bowls instead of letting it dry.
- Keep it sealed. Sealer won't stop minerals, but it keeps them from soaking deep into the pores, so they clean off easier.
- Call for the heavy stuff. Built-up scale on stone usually needs careful mechanical work, like honing, rather than stronger chemicals.
Do water softeners help?
A whole-house softener reduces scale inside the house. Outdoor stone still gets hard water from sprinklers and pool fill. Whether a softener's worth it for your home is a plumbing question. I just see the difference on the stone.