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Everything we do

Crawl space services, and only crawl space services

We do not do basements, foundations, concrete or roofs. Everything below is work that happens under a house, which is the only place we work — and the reason our crews are good at it.

01

Waterproofing

Stop water getting in, and move the water that is already there back out.

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How the system works

Crawl space drainage, in cross-section

Not to scale · every install is sized to the space
Crawl space drainage, in cross-sectionCutaway through a crawl space under a house: floor joists and a girder overhead, masonry piers on pads, a bare dirt floor, and a block foundation wall at each side with soil outside. Rain leaves a downspout on the left and soaks down through the ground, arrows push it sideways against the wall, and it collects on the dirt floor. Inside, a perforated drain pipe sits in a gravel trench along the base of the wall and runs right to a covered sump basin, whose pump sends the water up a riser and out away from the house. On the right, a dashed vapor barrier runs across the floor from the sump and turns up the inside of the wall. Five numbered callouts. One, the problem: rain and runoff saturating the ground around the house. Two, the problem: water pushing through the wall and up through the dirt floor. Three, the system: a perforated drain in a gravel trench around the inside perimeter. Four, the system: a sump basin and pump at the low point. Five, the system: the discharge line running the water well away from the house.12345GradeFloor aboveVapor barrier
  1. Callout 1. The problem: Rain and runoff soak the ground around the house. Downspouts and the fall of the lot decide how much of it arrives.
  2. Callout 2. The problem: It pushes through the block wall and up through the dirt floor, and the crawl space is the low point it collects in.
  3. Callout 3. The system: A perforated pipe in a gravel trench around the inside perimeter catches it below the level of the ground you crawl on.
  4. Callout 4. The system: It runs to a sump basin at the low point, where a pump lifts it out — sized to the water it actually has to move.
  5. Callout 5. The system: The discharge line is routed far enough from the house that the same water does not simply come back.

02

Crawl Space Encapsulation

Seal the ground off, then keep the air under there dry for good.

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How the system works

A sealed, conditioned crawl space

Not to scale · sized to the space
A sealed, conditioned crawl spaceCutaway through a crawl space under a floor, with a foundation wall at each side and bare ground below. Arrows show moisture rising out of the soil. A continuous liner covers the ground and turns up both walls, the foundation vent at the left is sealed shut, hatching marks insulation on the walls, and a dehumidifier and a covered sump sit in the space. A discharge line leaves the sump and runs out through the wall. Five numbered callouts. One, the problem: bare earth giving off moisture into the air under the floor. Two, the system: a reinforced liner across the ground and up the walls. Three, the system: the sealed vent and the insulated wall behind it. Four, the system: a dedicated dehumidifier holding the space at fifty to fifty-five percent. Five, the system: drainage and a covered sump carrying collected water out.12345GradeFloor aboveInsulated wall
  1. Callout 1. The problem: Bare earth gives off water continuously — gallons a day under an average house — and that air ends up on your first floor.
  2. Callout 2. The system: A reinforced liner goes down over the ground and up the walls, sealed at the seams, the piers and the perimeter. The edges are what fail on a cheap job.
  3. Callout 3. The system: Vents and access get sealed and the perimeter walls insulated — a vented crawl space just pulls humid summer air in against cool surfaces.
  4. Callout 4. The system: A dedicated dehumidifier holds the space around fifty to fifty-five percent, which is the range where mold will not get started.
  5. Callout 5. The system: Where the ground is wet, drainage and a sump go in first. Water that is actively running in will just float on top of a liner.

03

Crawl Space Repair

Fix the framing, the supports and the rot the damp has already cost you.

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How the repair works

Taking the load off a sagging girder

Not to scale · every support sized to the load
Taking the load off a sagging girderCutaway along the main girder under a crawl space, with the floor deck and its joists above, bare ground below, and a foundation wall at each side. A dashed line marks the floor's original level; the framing sags away from it toward the right. Five numbered callouts. One, the problem: ground moisture rising year after year out of the bare earth. Two, the damage: a cracked masonry pier that has settled into soft ground on stacked shims, with dark rot staining spread along the girder above it. Three, the damage: the floor above, measurably out of level and soft underfoot. Four, the system: two adjustable steel support jacks on poured footings bearing on undisturbed ground, raised gradually to take the load off the failing girder. Five, the system: a new joist sistered alongside the rotted ones, and the ground below sealed with a liner and drained so the moisture does not come back.12345Level datumGradeUndisturbed bearing grade
  1. Callout 1. The problem: Years of ground moisture under the crawl space. Damp wood loses strength, and damp ground gives way under whatever is standing on it.
  2. Callout 2. The damage: The support settles, the girder goes soft and dark, and someone stacks shims under it to buy a few more years.
  3. Callout 3. The damage: You feel it upstairs first — a floor that slopes, bounces, or has opened a gap at the baseboard.
  4. Callout 4. The system: Adjustable steel supports on poured footings take the load, brought up gradually to measured elevations. Forcing a floor cracks everything above it.
  5. Callout 5. The system: Rotted joists get sistered or replaced, and the ground gets sealed and drained so the wood stays dry this time.

Being straight with you

What we do not do

Being a specialist means turning work down. If your problem is on this list, we are not the right company — and we would rather say so now than send someone out.

  • Finished basements
  • Foundation underpinning
  • Concrete lifting or leveling
  • Radon testing or mitigation
  • Roofing
  • Fire, smoke or storm restoration
  • Insurance claim handling
  • Licensed mold remediation

What it costs

Typical price ranges

Guidance based on jobs we actually run in East Tennessee. Your written price comes after we have been under the house — never over the phone.

Typical price ranges for crawl space work
ServiceTypical range
Full crawl space encapsulation$5,000 – $15,000
Vapor & moisture barrier$1,500 – $4,500
Crawl space dehumidifier$1,800 – $4,000
Crawl space insulation$1,500 – $4,000
Interior French drain$2,500 – $7,000
Exterior French drain$3,000 – $9,000
Sump pump installation$1,200 – $3,000
Sump pump repair or replacement$400 – $1,500
Water diverters, grading & downspouts$500 – $2,500
Sagging floors — piers & support jacks$1,800 – $8,000
Wood rot & joist repair$1,500 – $6,000
Mold treatment$1,200 – $4,500

Not sure which one you need?

That is what the free estimate is for. We go under the house, take readings, and tell you what is actually causing it — including when the answer is cheaper than you expected.

Call 865-503-5483Request an estimate

Monday–Friday, 9am–5pm · Free on-site estimates, no obligation