Castalian Springs is a historic rural community on State Route 25 east of Gallatin, where homes on low ground or near a branch can collect runoff underneath and every vented crawl space takes in summer humidity. A mold remediation company removes the growth and the materials it has ruined, then deals with the moisture that caused it. Call the number on this page to be connected with a local mold remediation company in Castalian Springs.

What happens when you call
The call connects you with an independent mold remediation company that works in Sumner County. Be ready to describe what you've noticed (smell, visible growth, wet insulation, soft floors), when it started, and whether water has ever gotten under the house. Most companies want to see the space before giving a price. During the visit, expect the inspector to crawl the full space, take moisture readings on joists and subfloor, photograph growth and damage, and check the ground barrier, foundation vents, ducts and any plumbing running underneath. A useful written estimate names the moisture source, lists what will be removed and cleaned, and describes how the space will be kept dry afterward.
What drives the cost
Angi reports a national typical range of $500 to $2,000 for crawl space mold remediation; encapsulation, when it's needed, runs about $1,500 to $15,000 nationally. Prices in Middle Tennessee vary. Expect the estimate to move with:
- Square footage of affected framing and subfloor.
- Clearance: a 16-inch crawl takes longer than a space you can kneel in.
- How much insulation and debris has to be bagged and removed.
- Drainage work, such as regrading, downspout lines or a sump.
- Whether the job includes a liner, sealed vents and a dehumidifier.
- Wood repair, if joists or sills have softened.

Local conditions in Castalian Springs
This is an unincorporated part of Sumner County, about 7 miles east of Gallatin and home to the Wynnewood and Bledsoe's Fort historic sites. Sumner County's Flood Insurance Study notes that intense local rain makes headwater streams rise fast and spill over their banks often, with major floods usually in late winter and early spring. Homes near a branch or in a low pasture can see water under the floor after those storms, while houses on higher ground mostly fight summer humidity coming in through the vents. Structural repairs after remediation are permitted through the Sumner County Building & Codes Department, and work in a mapped FEMA flood zone also involves Sumner County Engineering and Floodplain Administration.
Before the company arrives
- Clear a path to the crawl space door and move anything stored just inside it.
- Write down when you first noticed the smell and any past water events.
- Note whether the air handler or ducts sit under the house.
- Have earlier home inspection or termite reports handy.
- Keep pets and anyone with asthma away from the access opening.
Crawl Space Mold Removal questions in Castalian Springs
Does the insulation between the joists have to come out?
Do I need mold testing before crawl space work?
What should I check before hiring a crawl space mold company in Tennessee?
Should I close the foundation vents on my crawl space?
More mold services in Castalian Springs
Crawl Space Mold Removal nearby
Sources
- Wikipedia: Castalian Springs, Tennessee
- Sumner County Flood Insurance Study, Volume 1 (pdf)
- Sumner County Engineering and Floodplain Administration
- Sumner County Building & Codes Department
- EPA: Mold Cleanup in Your Home
- EPA: Mold Information Slideshow (testing and sampling)
- Angi: How Much Does Mold Remediation Cost? (2026 data)
- Tennessee Contractor Classification Outline (TDCI)
- TDCI: Bidding FAQs
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