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Crawl space vapor barrier in Reno NV - a dry crawl space under your floors

Musty smell, damp dirt or cold floors over the crawl space? We find where the water starts, then cover the ground in plastic.

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Crawl space with a white vapor barrier covering the floor and walls beneath wooden joists and black ductwork.
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Crawl space vapor barrier
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(775) 447-1048

How can you tell your crawl space needs a vapor barrier?

  • A musty smell indoors

    If the house smells like an old basement, and it's worse after a storm or a long run of the sprinklers, that's usually damp air rising off bare dirt and coming up through the floor. Left alone, the smell settles into the house, and the wood under your floors stays damp longer than it should.

  • Dark or wet dirt below

    When you lift the hatch and the soil looks dark, feels wet or holds puddles, water is getting in from somewhere, often the yard, a downspout or the irrigation. The longer it goes, the more of the framing sits over that moisture, and plastic laid over it only hides the problem.

  • Torn or loose old plastic

    An old sheet that's bunched up, ripped along the path to the furnace or stopping short of the walls lets the ground breathe straight through the gaps. It looks like a barrier, so it's easy to forget about, but it isn't doing much until it's repaired or replaced.

Do you need a vapor barrier in your Reno crawl space?

A crawl space vapor barrier in Reno is a heavy plastic sheet laid over the dirt floor and sealed to the walls and piers, so ground moisture and soil gases stay under the house instead of working up into your rooms.

Most people call me because the house smells musty or the floors feel cold, and the real question is whether the crawl space needs drainage work, a liner or both, so that's what I sort out first. The price mostly moves with how big the floor is, how much wall and how many piers the plastic has to wrap, and whether water has to be fixed before the liner goes down, and the schedule turns on that same water, since wet ground has to be dealt with first. If the floors are still cold once the ground is dry, crawl space insulation is the next step to talk through. We're fully licensed and insured, and before any work starts we find out which office covers your address and handle the permit if the job needs one.

Details to note before an estimate

  • Rough size of the crawl space
  • Whether it has vents in the walls
  • Standing water or damp dirt
  • What's stored down there

How we install a crawl space vapor barrier

Plastic over wet ground just hides the problem, so I look for where the water is coming from before anything else goes down. Once that's handled, we clear out debris and any old liner, then cover as much of the floor as the space allows and run the plastic up the walls and piers, because the edges are where a short sheet lets the ground keep breathing into the house. Where someone has to crawl to the furnace or water heater, we can add a runner or an extra layer so that path doesn't tear, and we leave the way water already drains under the house working as it did. If you're comparing bids, check how much of the floor and walls each one actually covers. The work is backed by our satisfaction guarantee.

Some homes need a moisture layer in more places than the crawl space floor, and that's our vapor barrier installation work for walls and other spots in the house. Because the air under your floor and the air in your attic are connected, we often pair a crawl space job with attic air sealing, closing the gaps around lights, pipes and the hatch so the house stops pulling damp air up from below.

Other work that often goes with a crawl space liner

  • Vapor barrier installation

    For walls, slabs and other parts of the house where moisture needs something to stop it, beyond the crawl space floor.

  • Attic air sealing

    When upstairs runs drafty or the power bill stays high, closing the gaps up top keeps the house from pulling air up from below.

What happens after you call about a crawl space liner in Reno?

  1. Call or send us a message

    Tell us what you're noticing, whether it's a smell, damp dirt or cold floors, and whether you know if the crawl space has vents. We'll set a time for me to come out.

  2. I go under the house

    I come out myself, look at the crawl space and walk you through where the moisture is coming from and what I'd do first. You get a written estimate that lists any drainage fix separately from the liner, so you can see what each part costs before you decide.

  3. We settle the permit question

    Once you say yes, we check with the right city or county office and apply for a permit if the job needs one. Before we start, clear out what's stored down there so the plastic can cover the whole floor.

  4. The crew and I install it

    A small crew I work alongside lays and seals the barrier, and I'm under there with them. When we're done, I go over it with you so you know what's down there and where it's safe to step.

Questions before you book a crawl space vapor barrier

How much does a crawl space vapor barrier cost in Reno?

There's no one price, because it comes down to your crawl space, and I'd rather look before I guess. The size of the floor, how many piers and how much wall the plastic wraps, whether old liner and junk have to come out, and whether every seam gets sealed all move it, and so do extras like a walkway runner or a concrete cover over the plastic. Any drainage fix is listed on its own line of the written estimate.

Does a vented crawl space still need a vapor barrier?

Yes, the plastic ground cover belongs on the floor of a vented crawl space too, not just a sealed one. What changes is the sealing, since taping every seam and every spot where a pipe or post comes through is part of the job in an unvented crawl space, and a vented one doesn't get that step.

How do I know if my crawl space needs drainage work or just a vapor barrier?

If the dirt is wet or holds water after storms or watering, it needs drainage work first and the barrier after. In a vented crawl space, most of that water comes from the yard sloping toward the house, no drainage along the foundation or sprinklers soaking the ground, and it has to be fixed before the crawl space is sealed and insulated. If I see water getting in, your estimate puts that fix first.

Will a crawl space vapor barrier help with radon in Reno?

It helps, because a well-installed barrier helps keep down the soil gases, radon among them, that come up from the ground under your house. Nevada's state health division says elevated radon has been found in Nevada homes, that any building touching the soil can have it, mobile homes with skirting included, and it recommends testing every home. Plastic doesn't take the place of that test.

Do I need a permit for a crawl space vapor barrier in Reno?

Ask before assuming you don't, because Reno requires a building permit for most construction and building projects. The city's Permit Services answers permit questions at 775-334-2063 or permits@reno.gov. Either way, we check with the office that covers your address and apply when the job needs it.

How long does a crawl space vapor barrier take to install?

I can't tell you until I've seen it, because the biggest swing is whether water has to be fixed before the plastic goes down. Clutter, old liner and how tight the space is to crawl through matter too. Since it's plastic and not spray foam, you usually don't have to leave the house while we work.

Get your crawl space checked and a written plan

We respond within 1 business day, and the in-person estimate is free, with no pressure to book. After you send this, we'll reach out to set a time, I'll come look under the house myself, and you'll get a written estimate with what I'd do first.

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Find out what's under your floors

Call (775) 447-1048 or use the form, and have handy whether there are vents, where you've seen water and what's stored down there.

Request an estimateCall (775) 447-1048