Is 1700 PSI enough to clean siding?

Is 1700 PSI enough to clean siding?

Yes — 1,700 PSI is well within the effective and safe range for most residential siding, including vinyl, which actually needs less pressure than most people assume to clean thoroughly. At this level, you get enough force to lift dirt, pollen, and light mildew staining without significantly risking water intrusion behind panels or stripping the surface finish, which becomes a real concern above roughly 2,000–2,500 PSI on delicate siding. For tougher algae or years of accumulated grime, pairing 1,700 PSI with a proper cleaning solution and allowing it to dwell before rinsing will outperform simply cranking up the pressure. Stucco and fiber cement siding specifically benefit from staying at or below this range, since manufacturers like James Hardie explicitly caution against high-pressure washing their products.