Fixing the water first, because mold is a symptom.
Quick answer: Mold Remediation. Southeastern Renovation is a licensed South Carolina general contractor (CLG.127339) serving the Charleston Lowcountry and York County, SC. Work is coordinated by Southeastern Renovation as the general contractor. Licensed trade subcontractors handle work requiring their trade credentials; permit responsibilities depend on the project scope and jurisdiction. Call (843) 718-8177 for an estimate.
In this climate the source is often not a leak at all — it is a crawl space, poor ventilation, or ductwork sweating in an unconditioned space. Those are the ones that recur after a clean, because nothing about the conditions changed.
Containment is what separates a remediation from a redistribution. Disturbing growth without sealing the area moves spores through the rest of the house, and that is worse than leaving it alone.
Where an area is large, or where the occupants are reacting to it, independent testing before and after is worth having. A remediator marking their own homework is a conflict of interest even when the work is good.
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If the moisture source is still there, yes, and in the same place. That is why finding the water comes before removing the growth — a clean without a cause is a schedule, not a fix.
Small surface growth on a hard surface, often. Anything larger, anything in a wall cavity, or anything where somebody in the house is reacting to it needs containment — disturbing growth without it spreads spores through the house.
For anything significant, independent testing is better than testing by whoever is doing the removal.
We would rather point you at a third party than mark our own homework.