Knox Crawl Spaces runs the complete under-floor stack: encapsulation from $4,000, drainage from $2,000, floor repair from $1,500, dehumidifiers from $1,200, and mold treatment from $1,500 — every scope preceded by a free photographed inspection with humidity readings.
Crawl Space Encapsulation
The complete seal-and-dry: water managed, Class I liner, closed vents, sized dehumidifier — under the 70% line for good.
Sagging Floor Repair
Sistered joists, adjustable jacks, and new beams for framing the humid years softened.
Crawl Space Drainage
Interior drainage, sumps, and discharge routing for red clay that won't let rain leave.
Crawl Space Dehumidifiers
The drying half of every sealed system — sized, ducted, and drained correctly.
Crawl Space Mold Treatment
Remediation for the growth the humidity fed — plus the drying that keeps it gone.
Vapor Barrier Installation
Shut off the ground’s moisture — and make the crawl less interesting to East Tennessee’s termites.
Cost Guide: East TN Prices by Stage
Full-system and stage pricing, what moves a valley quote, and the itemization that exposes thin installs.
The sequence sells itself
Crawl work fails out of order and lasts in it: water managed before anything seals, wood repaired before anything covers it, growth treated before the space closes, and drying installed so the number holds through August. Our scopes are written in that order with fixed prices per stage — and stages your readings didn't order simply aren't on them.
Which service fits which crawl
| What the crawl shows | The valley mechanism | Start here | Typical range |
|---|---|---|---|
| Musty smell, humid floors, energy creep | Vented crawl breathing 70%+ RH summers | Encapsulation | $4,000–$14,000 |
| Bouncy floors, sagging runs, gaps | Decades of humidity (and termite country) in the framing | Floor repair | Member-by-member |
| Standing water, storm-fed dampness | Ridge-and-valley terrain routing runoff to your lot | Terrain-designed drainage | $2,000–$5,000 |
| Sealed but readings out of band | Valley humidity out-working the dryer | Crawl-rated drying | Sized to volume |
| Visible growth or staining | The humidity's recorded history | Treatment + correction | from $1,500 |
Most valley crawls need two stages. The readings pick them; the scope declines the rest in writing.
The termite dividend
East Tennessee carries some of the country's heaviest subterranean termite pressure, and that fact quietly doubles the value of crawl moisture work: sealed, dried crawls remove the damp-wood conditions termite scouts are hunting, while every inspection we run puts eyes and a probe on the framing where activity shows first. We're not a pest company and don't pretend to be — active infestation gets you a plain-spoken referral — but the overlap is real: the same dollars that fix your humidity buy down the region's most expensive wood problem, and the photographed framing ledger gives your pest contract something honest to start from.
Not sure which one you need?
Most people arrive here having noticed one specific thing rather than knowing a service name: a musty smell reaching the hallway, floors that feel springy underfoot, summer humidity that will not come down indoors, insects appearing in the same corner each year, or cold floors above an unheated space. Any of those is a reason to have someone look, and none of them is a diagnosis on its own. What causes them differs, which is why the visit comes before the quote.
Service questions
Which service does my crawl actually need?
The readings decide: the free inspection photographs everything, measures humidity and wood moisture, probes framing, and traces water — then the scope lists only the stages your numbers ordered. Dry crawls skip drainage; sound framing skips repair; some crawls just need the seal-and-dry.
Why is everything on this menu about moisture?
Because under an East Tennessee house, moisture is the whole economy — the 70% line feeds the rot, the rot softens the floors, the humidity grows the mold, and the clay funds all of it. Every service here either removes water, repairs its work, or holds the dried number. One enemy, five tools.
Is the inspection genuinely free?
Photographed, measured, written, and free across the corridor — including when the verdict is 'your crawl is actually fine,' which we deliver with the same photos and mild professional envy.
Which of these do I actually need?
Start from what you have noticed. Springy floors point at structure; a smell upstairs points at ground moisture; standing water under the house points at drainage before anything else. The inspection reads the crawl and the readings decide, at no cost.
Get a free Knoxville crawl space inspection
Tell us what you're noticing — smells, humidity, floor bounce, a wet crawl — and we'll schedule an inspection with photos of what we find. We reply the same business day.