Crawl Space Mold Removal in Brentwood, TN

Is my Brentwood neighborhood at risk of water under the house?

It depends where you are. In the May 2010 flood, about 16.6 inches of rain fell over two days; the Little Harpeth River flooded Brentwood's far west side, and Mill Creek and Owl Creek flooded the far east side, both areas made up mostly of subdivisions. Williamson County emergency management adds that flash floods can arrive with little warning and that most creeks are the property owner's responsibility. If your lot backs onto one of these streams, check FEMA's Flood Map Service Center, and remember a standard homeowner's policy doesn't cover flooding; coverage is available through the National Flood Insurance Program.

We've never flooded. Why is there mold on the joists?

Because the most common source is the air. In a vented crawl space, summer air full of moisture moves under the house and meets framing and ductwork cooled by the soil and the air conditioning. It condenses there, much like water on a cold glass. Large homes often have long duct runs under the floor, and a sweating duct or a disconnected joint can keep one area wet for months. Downspouts emptying beside the foundation, irrigation spraying the walls, and a torn ground barrier make it worse.

What does a proper fix include?

Expect the company to find and fix the moisture source first, remove moldy insulation, HEPA-vacuum and clean the framing, and dry the space before sealing anything in. Moisture control follows: a sealed ground barrier, drainage work, or encapsulation with closed vents and a dehumidifier. Angi reports national ranges of about $500 to $2,000 for crawl space mold remediation and $1,500 to $15,000 for encapsulation; local prices vary with size, access and how much drainage work is needed. Jobs of $25,000 or more require a Tennessee contractor's license, with S-F as the mold remediation classification.

A local note

Structural repairs after remediation, such as replacing a damaged sill or sistering joists, go through the City of Brentwood Planning and Codes Department, which issues building permits through an online portal. The department's Codes Enforcement Section handles property maintenance complaints, which renters can use for leaks a landlord hasn't fixed. The Williamson County Health Department in Franklin can help with health questions.