Thanks — your message reached Charleston Mold Removal Co.. We reply the same business day to schedule your free inspection, and yes, it includes going under the house. If there is standing water right now, call (843) 555-0100 instead — mold can begin establishing within 24 to 48 hours.
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Two things worth doing: photograph what you're seeing, and if you have a hygrometer, note the indoor relative humidity. If you can safely look into the crawl space, a photo of the ground and the joists is genuinely useful. The cost guide covers what the work runs here.