What crawl space encapsulation changes under a Clarksville house
Crawl space encapsulation turns the vented, dirt-floored space under a Clarksville, Tennessee house into a closed, dry one. A heavy liner goes over the soil and up the foundation walls, the vents and the access door are sealed, and a dehumidifier keeps the air below the point where wood takes on moisture.
The reason it matters here is the summer. Warm outdoor air carries a lot of water. When it drifts in through open vents and meets cool ducts, pipes and joists, it leaves that water behind. Venting was meant to dry the space, and for much of the year in Middle Tennessee it does the opposite.
The encapsulation page walks through each part, what has to be repaired before the liner goes down and the questions worth asking before you sign.
Start from what you have noticed
A musty smell upstairs in summer
Air from under the floor rises into the rooms above. A damp crawl space is the usual source.
Insulation hanging down or water on the soil
The space has been wet for a while and something needs repair before anything is sealed.
Water along the basement wall after rain
Seepage at the joint where the wall meets the floor is a drainage problem, not a paint problem.
A pump that never rests, or never starts
Either the pit is taking more water than the pump can move or the pump has failed.
There are more signs, with what each one usually means, on What are you seeing?
Every kind of waterproofing job, one page each
Crawl spaces come first because that is what most houses around Clarksville stand on. Basements, pumps and yard water each have their own page, and the waterproofing services page lists them side by side.
- Crawl space encapsulation
A sealed liner over the soil and walls, closed vents and a dehumidifier, so the space under the floor stays dry all year.
- Crawl space repair
Standing water, fallen insulation, wet joists and floors that have started to dip: what gets fixed and in what order.
- Sump pump installation
A pit and pump that lift ground water out before it reaches the floor, with a battery pump for when the power fails.
- Basement waterproofing
Drains cut in along the inside of the walls and barriers that steer seepage to a pump instead of across the floor.
- Exterior waterproofing
Digging down to the footing to coat the wall from outside and lay a drain beside it.
- Basement leak repair
One crack, one pipe sleeve or one window well that lets water in: how a single leak is tracked down and closed.
- Wet basement causes
Condensation, roof water or ground water. Three simple checks that tell you which one you have.
- Yard drainage and French drains
Moving roof and surface water away from the foundation, and what Montgomery County's sinkholes change.
- Crawl space dehumidifiers
When a dehumidifier is enough by itself, when it is not, and where its water has to go.
What happens when you call
You describe the problem
Where the water or damp shows, whether it follows rain, and whether the house has a crawl space or a basement.
A local company picks it up
You speak with an independent waterproofing company that covers your address. It is a separate business from this website.
It looks at the house and prices the work
Ask for the findings, the price and any warranty terms on paper. Then decide, or get a second opinion.
More detail, including what to have ready, is on How a call works.
Local things to settle before work starts
- Flood zone
- If the lot is in a mapped flood hazard area, Montgomery County wants equipment under the house kept above the flood elevation. Check the map first: how to look up your flood zone.
- Sinkholes
- They are common in this county, and a drain may not simply be pointed into one. See sinkholes and yard water.
- Buried utilities
- Any trench for a drain or a discharge pipe needs a locate request to Tennessee 811 at least three working days ahead.
- City or county
- Inside the Clarksville city limits, permits come from the city's Building and Codes office. Outside them, from the county's.
Around Clarksville
- WoodlawnCounty permits, septic field lines to steer around and roadside ditches that carry the runoff.
- AdamsRobertson County rules apply, including a state license most Montgomery County jobs do not need.
- Ashland CityThe town has its own floodplain ordinance and a number to call before grading or filling.
- Pleasant ViewTown permits inside the limits, Cheatham County outside, and what to do if the house is still under a builder's warranty.
Sango, St. Bethlehem and the rest of Clarksville are covered too. The service areas page says where the edges are.
Quick answers
Is this number for a flooded room right now?
No. Water standing on a floor today needs a water damage company to pump and dry it, or a plumber if a pipe has burst. Call here about keeping water out afterwards.
Do you do the work yourselves?
No. Clarksville Crawl Space Help is a referral service. An independent local waterproofing company inspects the house and does the work under its own name.
Will I be told a price on the phone?
Rarely a firm one. A company has to see the crawl space or basement before it can price the job. Expect the price after a visit, and ask for it in writing.
My house has a basement, not a crawl space. Is that covered?
Yes. Start with wet basement causes to see which kind of water you have, then read the page that matches.
Ready to have someone look under the house?
Say where the water or damp shows up and when it started. An independent waterproofing company serving the Clarksville area takes it from there, and you are not obliged to hire anyone.