A soft wash company explains the line: heavy rain can dilute or wash away the cleaning solution before it has had time to act, while overcast weather lets it dwell longer on the siding.

What the rain policies say

Company (area) Rain policy
Clearview Washing (New Jersey) Checks the weather and radar on the day; crews work in wind and rain
Maryland Pro Wash (Maryland) Rain or shine; cancels only for a severe storm or lightning
Pristine Clean (Ohio) Light and moderate rain don’t hinder most services
Power Washing 4 U (Grand Rapids, MI) Works in light rain; reschedules at no cost if conditions aren’t safe or effective
Hudson Valley Pro Wash (New York) Weather-dependent; reschedules for rain or snow at no cost

In each, the company makes the weather call. If your quote doesn’t say what a rain day costs, ask before paying; our guide to house wash deposits covers the terms to read.

When rain really does move the job

Sealing is the part that needs dry weather. One concrete water-repellent label says to let the surface dry at least 24 hours after rain and not to apply it when rain is expected within 24 hours; a paver sealer maker gives the same 24-hour window. If sealing is on the job, expect it to move: see sealing a concrete driveway and paver clean, sand and seal. Afterward, judge the wash by its results.

Sources

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