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Should I Avoid Spraying the Side of My House with Hard Water?

Tim Sondrup
3 years ago

I sprayed the sides of my new home with water from the outside spigot to wash off some dirt. It left a bunch of hard water stains on the windows, and I was wondering if that’s bad for the siding? We have HardieBacker cement board. I live in Utah where the water has very high mineral content. The house has a pretty recent paint job and I just don’t want to ruin it with mineral buildup, especially if I spray the house going into the future to keep it looking clean.

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