Start with conditions, not a product
Growth on a crawlspace joist or vapor barrier is a symptom, not the diagnosis. The plan that actually works traces the water back to where it's entering the crawlspace, tracks humidity at ground level, checks how far it has reached into framing, keeps the space sealed off from living areas during work, and confirms it afterward.
Build a complete scope
- What is feeding the growth, identified ahead of any cleaning quote
- Whether it traces to the roof, a plumbing failure, or humidity alone
- Containment and air handling while the area is open
- What is removed versus cleaned, and the reasoning behind that line
- Post-work verification and the correction that stops it recurring
Cary context
A smaller pocket of Cary's housing, generally the older homes closer to the original downtown, was built over crawlspaces rather than slabs, and the western Wake County clay underneath drains slowly enough that a poorly vented or unencapsulated crawlspace can stay damp for days after a heavy piedmont thunderstorm.