Crawl space vapor barrier in Memphis TN - bare dirt covered wall to wall
Musty smell, damp floors or wet dirt under the house? We cover the ground and run the plastic up the walls and piers.
Does your Memphis crawl space need a vapor barrier?
A crawl space vapor barrier is a sheet of heavy plastic laid over the dirt under your house, and in Memphis it's one of the simplest ways to help cut the ground moisture and soil gases that rise into your floors and the air you breathe.
The call usually starts with a musty smell in the house, insulation sagging under the floor, or a pest tech who came out of the crawl space and said the dirt is wet. The price turns on how big the crawl space is, how many piers and how much wall the plastic has to wrap, how heavy a liner you want, and whether we're sealing the whole space with a dehumidifier or just covering the ground. The schedule turns mostly on water, because any drainage problem or standing water gets fixed before plastic goes down, and on whether the space needs clearing out first. I'll come out, get under the house and give you a number for your crawl space, and if your floors run cold too, we can look at crawl space insulation on the same visit.
How we install a crawl space vapor barrier
First I look for water, because if there's standing water down there, you'll need that fixed before we lay anything, or the plastic just traps it against the ground. Once the space is dry and cleared, our installers cover the whole floor of the crawl space edge to edge and into the corners, overlapping the seams so no strip of dirt is left open. Then we take the plastic up the foundation walls and wrap it around every pier, the block columns holding up your floor, because gaps at the edges are where a barrier lets moisture back in. We finish by checking the corners, cleaning up and showing you what's down there now.
Damp under the house is often part of a bigger picture. If moisture is also coming through a basement wall or a slab, our vapor barrier installation work handles those spots. Air leaking out the top of the house pulls air up from underneath, so attic air sealing, closing the gaps around lights, pipes and the hatch, is often the next job worth doing.
Ground cover with the vents left open
This suits you if you want to keep your crawl space vents working and just stop the dirt from breathing into the house. It's the smaller job and the lower price, and it still takes on the moisture coming off the ground.
Heavier reinforced liner
If your furnace, ductwork or water heater is down there and somebody crawls in to service it, thicker reinforced plastic holds up to knees and tools. Thin plain plastic tears where people walk unless a path is protected, so I usually steer people with equipment down there toward the tougher liner.
Fully sealed crawl space
Walls covered, vents closed and a dehumidifier running, so the crawl space stays dry like the rest of the house. It makes the most sense when your ductwork lives down there, and only after any water problem is fixed.
Crawl space vapor barrier permits and planning in Memphis
Whether a vapor barrier job needs a permit isn't something I'll guess at for your house. In Memphis, Arlington, Germantown, Lakeland, Millington and unincorporated Shelby County, the construction department that serves the city and county reviews plans, issues construction permits and inspects building work, so that's who decides. When a job calls for a permit, we handle the application and set up the inspections with the office that covers your address.
Lots that take on water need a second look before anything gets sealed. Federal flood guidance says sealed, conditioned crawl spaces shouldn't be used in flood-prone areas, so if your property sits in one, weigh that before you close the vents, and I'd lean toward a ground cover with the vents left working. Around Memphis we see plenty of older houses on piers with bare dirt underneath, and we run into the same kind of crawl space on jobs in Bartlett and Germantown.
Crawl space liners up close
Why call us for a vapor barrier
I do every estimate myself
I come out, get under the house and give you the estimate, and our installers do the work. We've been in business since 2021, and I spent years in heating and cooling before that, so I'm looking at your ductwork and equipment down there, not just the dirt.
Safe air before a tighter crawl space
If a gas furnace or water heater sits in or near the crawl space, I check that it still gets the air it needs before we close anything up. Tightening a house only makes sense if it's still safe to breathe in and burn fuel in.
Licensed and insured on every job
We're licensed and insured. Ask to see it when I'm out for the estimate, and I'll show you before anyone goes under your house.
Based in Memphis, working three states
We're based in Memphis and work across the cities around it in Tennessee, Mississippi and Arkansas. That means the crew under your house knows the kinds of houses and crawl spaces you find around here.
Before you call, it helps to know roughly how big the crawl space is, whether you've seen standing water, how your vents are set up and what your pest warranty says. Call (901) 203-1514 or send us your details, and I'll set a time to come look.
(901) 203-1514Request a crawl space vapor barrier estimate
We reply to every message within one business day to set a time that works for you. I come out to your house, look under it and give you the estimate myself, free and with no obligation.
Crawl space vapor barrier questions in Memphis
Does my crawl space need a vapor barrier if it has vents?
Yes, the plastic ground cover belongs down there whether your crawl space is vented or sealed. Vents move air, but they don't stop the moisture rising off the dirt, so keeping your vents open is no reason to skip the cover.
How much does a crawl space vapor barrier cost in Memphis?
Fully sealing a 1,500 sq ft crawl space in Memphis with a 12-mil vapor barrier, a heavy plastic, plus a commercial dehumidifier usually runs about $4,600 to $8,600. That's the going rate for the bigger sealed-up job, not a ground cover alone. For a plastic-only price on your house, I'll give you a number at the estimate.
Should I test for radon after a crawl space vapor barrier in Memphis?
Yes, because EPA's radon map for Tennessee says every home should be tested, no matter which zone it's in. A vapor barrier helps reduce soil gases like radon, but only a test tells you where your house stands, so plan one alongside the crawl space work.
How do I get my crawl space ready for a vapor barrier?
Clear out whatever's stored down there, along with old boards, trash and loose debris, so the plastic can lie flat over all of the ground. If you're not sure what can stay, ask me at the estimate and I'll tell you what has to come out.
What causes moisture in a crawl space with vents?
Usually it's moisture vapor rising out of the bare dirt, plus damp outdoor air coming in through the vents and condensing on the cooler wood. For humid climates, building scientists recommend closed, insulated crawl spaces for that reason. A ground cover handles the first problem either way.
Will a crawl space vapor barrier affect my pest control warranty?
Ask your pest company before we start, because they're the ones who know whether a closed crawl space would get in the way of their treatment or change their warranty. Bring their answer to the estimate and we'll plan the job around it.
Talk to us about your crawl space vapor barrier
We pick up seven days a week from 8 AM to 9 PM, so call (901) 203-1514 after you've had a look under the house.
