Vapor barrier installation in Lafayette IN - a drier crawl space under your floors
Musty smell or damp dirt under the house? We cover the crawl space floor with sealed plastic so ground moisture stays in the ground.
Do I need a vapor barrier in my crawl space?
Vapor barrier installation in Lafayette means laying heavy polyethylene plastic over your crawl space floor and sealing it to the walls and piers. That plastic ground cover keeps water and water vapor from the dirt out of the crawl space and helps keep soil gases from working their way up into your house.
Most people call because the house smells musty, the floors stay cold, or someone looked under the house and found wet dirt or old plastic in shreds. The choice usually comes down to three options: a plastic ground cover alone, fixing the plastic that's already down, or sealing the whole crawl space, which often goes along with crawl space insulation. The price moves with the square footage, how low and cluttered the space is, how many piers and pipes the plastic has to be sealed around, and which of those three you choose. The schedule mostly turns on whether grading or drainage needs fixing first and whether your address needs a permit, and when I come out I write down what I'd do and why.
How our crew installs a vapor barrier
I start by finding where the water's coming from. In a vented crawl space, most of it usually runs in from grading that slopes toward the house, missing drainage around the foundation or sprinklers soaking the beds, not from vapor rising out of the dirt. If that's the problem, I'll tell you to get the grading or drainage fixed first, and if you plan to seal the walls, that work has to be done before we start. Once the water's handled, anything stored down there gets cleared out so the plastic can cover all the ground. Our crew lays heavy polyethylene over the floor and overlaps the seams, sealing them with tape made for this plastic. We seal it around pipes coming up from the ground and fasten it up the walls and piers or stake it along the edges, so no bare dirt is left showing.
Plastic on the ground handles moisture from below, but it won't fix drafts or a cold upstairs on its own. Warm air leaking out through the top of the house pulls air in from the bottom, so I often suggest attic air sealing once the crawl space is done. If the house is older and the walls feel cold, retrofit insulation adds insulation to the walls you already have.
Plastic ground cover only
This suits a vented crawl space that stays dry once the outside water is handled. Heavy plastic over the dirt stops the moisture rising out of the ground without changing how the space is built, so it's the simplest of the three and the usual starting point.
Repair the old plastic
If decent plastic is already down and it's just loose or torn, fixing it costs less than starting over. On the estimate I'll tell you whether patching and taping will do or a new sealed layer over it makes more sense.
Sealed crawl space
This suits a house with cold floors or ductwork under the floor. A crawl space built unvented, air-sealed, insulated and conditioned like the rest of the house cuts down the condensation humid air leaves on cold floor joists when it comes in through vents. Before the work starts we bring up radon testing. ENERGY STAR advises a radon test, and fixing any radon problem, before you seal a home in a high radon area. It also suggests testing oil or gas appliances before and after sealing to make sure they still vent their exhaust properly.
Planning vapor barrier installation in Lafayette
Inside Lafayette city limits, the City Engineer's Office issues building permits, and the city requires one for any alterations, repairs or changes to an existing building. Whether your crawl space job falls under that is something I confirm for your address before we schedule, because outside the city the county or another office may be the one that decides. If the job needs a permit, we handle the paperwork and tell you what the office needs from you. We send it in early, because the city's review of a residential project can take up to seven days, counted from when every required document is in.
We're based in Lafayette and work across the cities around it. Most of the old plastic we find was never taped or fastened, so it pulled loose or tore wherever someone crawled through to reach a pipe or the furnace. Corners also stay damp where the yard slopes toward the house. We see the same thing on jobs in West Lafayette and Frankfort, and we handle it the same way.
Vapor barriers and crawl spaces
Why call us for vapor barriers
I estimate it and check it
I come out and write the estimate myself, our install crew lays the plastic, and I walk the finished job with you at the end. The work is backed by our satisfaction guarantee.
Years in commercial insulation first
I spent years spraying foam and blowing fill on warehouses, offices and new buildings before I started this business in 2017. That's where I learned that the prep decides how a job holds up.
Licensed and insured, every job
We're licensed and insured. That matters when a crew is working under your floors, around your pipes and ductwork.
A Lafayette crew, my phone
We're a small crew based in Lafayette, and I still answer the phone myself. You get a straight answer from the person who'll come look at the job.
On a vapor barrier, the water question gets settled before any plastic goes down, and that's the first thing I'll look at. Call (765) 250-8263 or send us a message to set up a visit.
(765) 250-8263Get a written plan for your crawl space
Tell us roughly how big the crawl space is in square feet, whether it has vents, and whether there's old plastic or standing water down there. We reply within one business day. Then I'll come out for a free, no-obligation estimate, walk the space with you and write down what I'd do and why.
Lafayette vapor barrier questions
Do I need a vapor barrier if my crawl space is vented?
Yes, the plastic belongs on the floor whether the crawl space is vented or sealed. Vents move air through the space, but they do nothing about moisture rising out of the dirt, and stopping that moisture is the ground cover's job.
What is the best way to fix old plastic in my crawl space?
Often it can be repaired, if it's 6-mil plastic, a common thickness, that has only come loose from the walls or opened at the seams. In that case we tape the tears and seams and run the plastic up the walls. A new sealed layer laid over the old one and fastened to the walls and piers is more durable, so that's usually what I suggest when the old sheet is thin or badly torn.
How much does a crawl space vapor barrier cost in Lafayette?
Across the US, a crawl space vapor barrier usually costs about $0.50 to $7 per square foot, from basic plastic over a dirt floor up to a fully sealed barrier. That's the national market range, not our price. Your estimate is where I write down what I'd do for your crawl space.
Do we have to leave the house during vapor barrier installation?
Usually not. Laying and taping plastic doesn't involve spraying anything, and the crew works below the house through the crawl space access. If the job grows to include spray foam on the crawl space walls, I'll tell you the re-entry time, which is when it's safe to come back inside, before we start.
How do I keep a crawl space vapor barrier from tearing where people walk?
Cover the path people actually use, such as the route to the furnace, with a vinyl runner or an extra layer of plastic. For heavier traffic, the sealed plastic can be covered with a concrete slab, which is a bigger job but stands up to foot traffic.
Can I install a vapor barrier myself in Lafayette?
Yes. On a residential job that needs a city permit, Lafayette lets homeowners do the work if they submit a copy of their homeowners insurance and live in the house or plan to. Any plumbing has to be done by a state licensed plumber. The hard part is getting the seams and wall edges sealed tight in a low, dirty space, because that's usually where a barrier starts coming loose.
Get your crawl space and vapor barrier looked at
Call (765) 250-8263 or send the form, since torn plastic is simpler to fix before damp gets into the floor framing above it.
