Crawl Space Vapor Barriers in Nashville & Middle Tennessee
A vapor barrier is one of the simplest ways to keep a crawl space drier and cleaner. U.S. Pest Protection installs crawl space vapor barriers from 6 mil to 21 mil, with every seam sealed using waterproof marine tape, in homes across Middle Tennessee. It starts with a free crawl space inspection. Call 615-590-1260 to schedule yours.
What a Crawl Space Vapor Barrier Does
Bare dirt under your home gives off moisture every day. A vapor barrier is a durable sheet laid over the crawl space ground that traps that moisture in the soil, so less of it reaches your floor joists, your subfloor and the air that rises into your home. It also gives your crawl space a clean surface, makes pest activity easier to spot, and gives HVAC technicians and plumbers a better place to work.
6 Mil: The Budget-Friendly Start
Six mil is often called builder grade, because it’s the thickness commonly used when new homes are built. It’s a good choice when you want to reduce crawl space moisture at the lowest cost, and we’ve offered it since our company began.
10 to 21 Mil: Heavier-Duty Options
For bigger moisture problems, or barriers secured up the crawl space walls and around the piers, we offer 10, 12, 16 and 21 mil barriers, in reinforced and non-reinforced versions. Heavier barriers cost more and do more.Vapor Barrier Installation, Made Simple
Your Best Option:
We walk you through the barriers that fit your home and budget.
A Sealed Barrier:
Every seam is taped with waterproof marine tape for a complete barrier.
Why Homeowners Choose a Vapor Barrier
A vapor barrier is a great standalone service, and it makes everything else under your home easier:How We Choose the Right Barrier for Your Home
There’s no one-size-fits-all vapor barrier. Your inspector looks at the size of your home, the kind of moisture problem you’re having, and whether the barrier should be secured up the crawl space walls and around the piers. Then we explain the difference in price and effectiveness for each option, so you can choose what fits your home and budget. If your crawl space needs more than a barrier, see our full crawl space encapsulation and moisture control services.
Sealed Seams Make the Difference
A barrier is only as good as its seams. We seal every seam with a waterproof marine tape designed for crawl space work, so moisture can’t slip up between the sheets. That’s what turns plastic sheeting into a complete moisture barrier for your crawl space.
Vapor Barrier Thickness Guide
- 6 mil: builder grade, the lowest-cost way to reduce crawl space moisture
- 10 mil: a heavier step up from builder grade
- 12 mil: heavier still, for crawl spaces that need more
- 16 mil: heavy-duty protection for tougher moisture problems
- 21 mil: our heaviest vapor barrier
- Reinforced or not: options vary by thickness, and your inspector will explain the difference
Signs Your Crawl Space Needs a Vapor Barrier
- A musty smell: damp crawl space air rises into your living space
- Bare, damp dirt: soil under the home that stays wet or muddy
- More pests: camel crickets, cockroaches and silverfish thrive in damp crawl spaces
- Condensation: moisture beading on ducts, pipes or framing
- Wood moisture at 18% or higher: we measure the moisture in your floor joists and framing at every crawl space inspection, and 18% or higher means it’s time to act
Vapor Barrier Pricing
- How it’s priced: at your free crawl space inspection
- What affects the price: home size, barrier thickness, and whether it’s secured to walls and piers
- The inspection: free, with no obligation
We’ll show you each option side by side, with the price and what it does for your home, before any work begins. We’ll never sell you something you don’t need.
Need More Than a Vapor Barrier?
A vapor barrier is often the first step. When a crawl space has standing water, high humidity or fungus on the framing, we may recommend adding a dehumidifier, a sump pump or an antifungal wood treatment, or our Moisture Shield program, our version of full crawl space encapsulation. We hold Tennessee certification to treat both pests and fungus, so your moisture and pest protection work together.
Questions about your crawl space? Call 615-590-1260 and we’ll set up your free inspection. For a deeper look at what we watch for, see our guide to wood-destroying insects in Tennessee.
Vapor Barrier FAQs
What is a crawl space vapor barrier?
It’s a durable plastic sheet that covers the ground in your crawl space. It traps moisture in the soil, so less of it rises into your floor framing and your home.
What thickness vapor barrier do I need?
It depends on your home’s size, the type of moisture problem and whether the barrier will be secured to the walls and piers. We offer 6, 10, 12, 16 and 21 mil, and your inspector will recommend the best fit after a free inspection.
How do I know if my crawl space has too much moisture?
We check with a moisture meter at your free crawl space inspection. If the wood in your crawl space reads 18% moisture or higher, it’s a sign your crawl space needs a moisture barrier. Musty smells, damp soil and condensation on ducts or pipes are other warning signs.
What does builder grade mean?
Builder grade usually refers to a 6 mil vapor barrier, the thickness commonly used when new homes are built. It’s the lowest-cost way to reduce crawl space moisture.
Is a thicker vapor barrier better?
Thicker and reinforced barriers are tougher and can do more in crawl spaces with bigger moisture problems, and they cost more. The right choice depends on your home.
Do you tape the seams?
Yes. We seal every seam with waterproof marine tape designed for crawl space work, to create a complete moisture barrier.
Is a vapor barrier the same as crawl space encapsulation?
No. A vapor barrier covers the crawl space ground. Encapsulation seals the whole crawl space. Our encapsulation program is called Moisture Shield.
Can I get a vapor barrier on its own?
Yes. A vapor barrier is a great standalone service, and it can be combined with other moisture solutions later.
Will a vapor barrier help with pests?
It lowers the moisture that draws pests like camel crickets, cockroaches and silverfish, and it makes pest activity and termite mud tubes easier to spot during inspections.
Can HVAC technicians and plumbers still work under my home?
Yes. They crawl on top of the barrier, which keeps the crawl space cleaner for everyone.
How much does a vapor barrier cost?
Price depends on your home’s size, the barrier thickness and whether it’s secured to walls and piers. We’ll give you a price for each option at your free crawl space inspection.
Crawl Space Vapor Barriers Across Middle Tennessee
We install crawl space vapor barriers throughout Nashville, Brentwood, Franklin, Hendersonville, Mt. Juliet, Murfreesboro, and nearby towns, from our Nashville and Hendersonville offices.
Damp Crawl Space?
Call 615-590-1260 to schedule your free crawl space inspection.
More Ways We Protect Your Home
Not sure what you’re dealing with?
Identify it in our Pest ID Guide.
