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Services Crawlspace Encapsulation
Your Partners in a Healthier Home · Charlotte, NC

Crawlspace encapsulation, built for Charlotte's humidity.

A crawl space that isn't sealed and controlled becomes the single biggest source of moisture — and eventually mold — in a Piedmont home. Pure Charlotte clears debris, treats subfloor staining, fixes drainage, and seals the space with a thermal-blanket vapor barrier, so hot, humid Carolina summers stop feeding what grows underneath your floors.

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4.9/5 From 168
Google reviews
20+ yrs Combined experience
in home health & crawl spaces
1 Yr Free re-treatment warranty
— stays with the home
1-Year Free Re-treatment Warranty On every Pure Charlotte encapsulation
Pure Charlotte technician inspecting a Charlotte-area crawl space

“Sealing the crawl space and putting a dehumidifier down there made all the difference.”

Kendall King · Google review

Verified Reviews

Trusted by homeowners across Charlotte.

4.9/5 stars on Google from 168 reviews. Every reviewer is a real client.

“Great customer service and team. Sealing the crawl space and putting a dehumidifier down there made all the difference. Before that, my old house indoor humidity was almost the same as the outdoors. Now even on the wettest of days, its only 50% max indoors. 🎉”
KK
Kendall King
Google review
Verified
“The team at Pure Air were attentive and respectful, helping us handle a mold problem and re encapsulating our crawl space. They let us know what was happening in the project, dates and times to expect them, and making themselves available for any questions we had. The work done was also great, tearing out the old and disposing it and making sure the work was done properly to avoid any future issues. I would recommend for any water or mold issues!”
AF
Athena Ferguson
Google review
Verified
“Very professional and excellent work from the entire team. We had a serious mold problem in our crawl space and HVAC. Pure Air NC was comprehensive and was able to get everything done quickly and effectively.”
TV
Taylor Van Heest
Google review
Verified
“we have our crawl space dehumidifiers serviced by Josh Hartness each year. he installed our dry basement and entire system originally. it was/is an impeccable job. he does a terrific job, extra professional, and he is of the most personable people my wife and i have ever done business with!”
SD
Stephen Deutsch
Google review
Verified
“A family member recommended them and I was very pleased. The work was done ahead of schedule. My crawlspace looks amazing and we had a concern with possible leakage and they sent someone out right away. (It turned out to be our plumbing). I had a lot of questions throughout the process and they always responded in a timely manner. We are talking within minutes and hours — not days. I've since recommended them to others including my MIL.”
SC
SD Carlson
Google review
Verified
“PureAir was great to communicate with. They were effective in their method and they were efficient. We were only out of the house for a few hours, much less than I originally thought. If I ever needed to use them again, I certainly would.”
CM
Candice Morgan
Google review
Verified
Warning Signs

Don't underestimate the importance of a well-maintained crawl space. It's the foundation of a healthy, energy-efficient home.

Most crawl space problems don't announce themselves — they show up somewhere else in the house first. If any of these sound familiar, it's worth a look underneath.

Mold growth elsewhere in the home

Mold showing up in a closet, bathroom, or other room is often traced back to moisture rising from an unsealed crawl space below.

Odors with an unknown cause

A musty smell with no obvious source is one of the most common early signs of a crawl space moisture problem.

Creaky, cupping, or sagging floors

Wood floor joists and subfloor absorb moisture from a humid crawl space long before you can see or smell the damage.

Flooding or saturated soil near the foundation

Standing water or consistently wet ground next to your home's foundation is a direct line into an unsealed crawl space.

A general feeling of unwellness

Fatigue, headaches, or breathing issues that improve when you're away from home can point back to indoor air quality below your feet.

Pests or bugs in the home

High humidity underneath the house is exactly the environment pests and bugs look for — and a way in to the rest of your home.

Occupants testing positive for mold exposure

If a household member has tested positive for mold exposure or toxicity, an unsealed crawl space is one of the first places to check.

Why Pure Charlotte

Why homeowners choose Pure Charlotte for their crawl space.

We didn't start as a crawl space company. We started as a mold remediation business — and expanded into crawl space services because moisture control down there is the single biggest lever on whole-home mold risk.

We understand

Having assisted countless families affected by mold-related illness — including personal experience on our own team — we deeply empathize with restoring health to a home and its homeowner.

Mold first

We began as a mold remediation business and expanded into crawl space services specifically because moisture control there is the single biggest lever on whole-home mold risk.

Effectiveness guaranteed

Scientifically-validated moisture control that prevents recurrence — not just masks it.

Warranty-backed

Every treatment carries the same 1-Year Free Re-treatment Warranty as our mold remediation work.

Locally owned and operated

A Charlotte-based team that shows up, not a national franchise call center.

Built for the Piedmont climate

July through November brings a lot of humidity that's tough on crawl spaces here — there are very few homes in the Charlotte/Piedmont region whose crawl space doesn't need some level of moisture control.

Charlotte crawl space before moisture control treatment
Why Moisture Control Is the Real Fix

Mold doesn't cause the problem. Moisture does.

When humidity is high, the wood products in your crawl space — your subfloor and floor joists — absorb water straight out of the air. As the moisture content in that wood climbs, mold begins to grow. Charlotte's humid subtropical climate makes this an almost year-round risk, and it's why an encapsulation that only addresses what you can see — without controlling the moisture — doesn't hold.

  • Seals the ground and walls against humidity and moisture
  • Drainage and a sump pump give water somewhere to go
  • A dehumidifier holds humidity down long after we leave
  • If active mold is already present, we pair this with our mold remediation treatment
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The Encapsulation Sequence

Steps to an effective crawlspace encapsulation.

Not everything below is needed for every crawl space — your technician tailors the scope to what your home actually requires. But this is the sequence we commonly follow on a full encapsulation.

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  • Debris removal & preparation — old vapor barrier, damaged insulation, and large rocks or bricks cleared out; high and low points in the ground leveled.
  • Stain treatment — a concentrated hydrogen peroxide mixture applied to the exposed subfloor and framing to minimize staining and physical growth.
  • Drainage & sump pump — where ground water is high, french drains around the perimeter lead to a sump pump that moves water out of the home.
  • Thermal blanket — insulation moves from the subfloor to the walls, sealing the entire foundation against outside air and moisture intrusion.
Our Process

Four steps. One dry crawl space.

Every project follows the same protocol — identify, eliminate the cause, treat, and prevent. Here's the high-level view; the detailed walkthrough follows below.

  1. 01

    We identify

    We inspect the crawl space for moisture sources, standing water, damaged insulation, and subfloor staining — and check whether ground water or drainage is part of the problem.

  2. 02

    We eliminate the cause

    We address the moisture source itself — grading, drainage, sump pump, standing water — not just the symptoms sitting on top of it.

  3. 03

    We treat

    Debris is cleared, exposed wood and subfloor are treated for staining and microbial growth, and the space is prepped for sealing.

  4. 04

    We prevent

    The vapor barrier, sealed walls, dehumidifier, and thermal-blanket insulation go in — so the fix holds through the next humid season, not just this one.

Detailed Walkthrough

Encapsulation, stage by stage. How it works.

Not every crawl space needs every stage below, but this is the sequence we follow when a full encapsulation is the right call.

Pure Charlotte technician clearing debris from a crawl space Great prep, great result
01  Debris Removal & Preparation

We clear the crawl space down to a clean, level base.

We remove the old vapor barrier, any damaged or mold-exposed insulation, and large rocks or bricks left behind from construction. High and low points in the ground get leveled, so the new vapor barrier can sit flat and seal properly.

The key to a great final product is great preparation. Skip this step and every step after it — the seal, the drainage, the thermal blanket — performs worse.

Stain treatment being applied to crawl space subfloor and framing Subfloor & framing
02  Stain Treatment

A concentrated treatment minimizes staining and growth.

We apply a concentrated hydrogen peroxide mixture to the exposed subfloor and framing. It minimizes staining and physical growth on the wood — the same wood that's been absorbing moisture out of the air every humid Charlotte summer.

If we find active mold during this stage, we scope it in alongside our full mold remediation treatment rather than treating the stain alone.

French drain and sump pump installation in a Charlotte crawl space Where ground water is high
03  Drainage & Sump Pump

Sealing the ground with plastic alone isn't enough.

Where ground water is high — common across parts of the Piedmont — we install french drains around the perimeter of the crawl space as needed. Those drains lead to a sump pump that actively moves water out of the home and into the yard.

Every crawl space needs some way for water to escape. In an extreme rain event or with high ground water, water that enters the crawl space needs an exit — either a sump pump or a daylight drain.

Thermal blanket wall insulation completing a crawl space encapsulation Warranty-backed
04  Thermal Blanket

Insulation moves to the walls, not the subfloor.

1-Year Free Re-treatment Warranty: we're confident enough in this process to offer it on every job. It stays with the home — so if you sell, the new buyers can trust the solution too.

Instead of insulating the subfloor, we move insulation to the walls. That creates a healthier environment for floors and wood framing, keeps plumbing connections exposed for easier leak detection, and installs an insulative barrier around the entire foundation against outside air and moisture intrusion.

A longer warranty is available through our recurring inspection service, the Peace of Mind Warranty Plan — ask your consultant about it. Coverage assumes no new water intrusion, no prolonged high indoor humidity, and any recommended repairs completed.

The Evidence

The same science behind our mold treatment applies down here too.

Moisture control is what keeps a crawl space from becoming a mold problem in the first place. When active mold is found during a crawl space job, it's treated with the same lab-verified VaPURE™ process backed by the research below.

Army barracks buildings of the kind treated in the Fort Campbell field study Field study · PDF
USACE · ERDC Fort Campbell field study

U.S. Army Corps of Engineers field test of VaPURE™ mold remediation

A six-month evaluation by the Army's Engineer Research and Development Center of the VaPURE™ application system on two occupied buildings at Fort Campbell, Kentucky — measuring both initial efficacy and recurrence.

95%+ Spore-count reduction sustained at 6 months post-treatment
Read the report
Independent laboratory analysis of vapor peracetic acid Lab reports · PDF
GLP Lab Reports 2024 · Compilation

Good Laboratory Practice efficacy reports for vapor peracetic acid

A compiled set of GLP-compliant independent laboratory tests of the vapor peracetic acid (VPA) treatment against mold, bacteria, and viral targets — the underlying chemistry behind the Pure Charlotte VaPURE™ process.

Log-6+ Pathogen reduction across the GLP test panel
Read the reports
Pure Maintenance sign White paper · PDF
Pure Maintenance White paper · S. Jankoski

Why the Pure Maintenance mold remediation and vapor decontamination is so effective

A technical explainer of the three "magic-bullet" variables — 7.5μm particle size, vapor phase change, and dwell time — that make the treatment behave like a gas and reach where surface cleaning never does.

7.5μm VaPURE™ droplet — 1/9th the diameter of a human hair
Read the white paper
Frequently Asked

Questions about crawlspace encapsulation.

Fully sealing the crawl space ground and walls to prevent humidity and moisture issues. In general this includes a high-quality vapor barrier on the ground, plastic sealed to the walls, a dehumidifier, and drainage with a sump pump.

Almost certainly you need something, yes. The Piedmont's humid season — July through November — brings a lot of humidity that's tough on crawl spaces. There are very few crawl spaces in the Charlotte region that don't require some level of moisture control.

Sometimes, yes. If your crawl space doesn't need a full encapsulation, or budget doesn't allow for one right now, doing part of an encapsulation can work for a time before the rest of the project is completed.

When humidity is high, wood products — your subfloor and floor joists — absorb water from the air. As the moisture content in the wood increases, mold begins to grow.

No — this is commonly misunderstood, even by some crawl space contractors. At best, existing mold goes dormant; as soon as there's a new moisture event, it begins to grow again. If you already have active mold, pair encapsulation with our mold remediation treatment to actually treat it.

It depends on your crawl space, but in general, high humidity for prolonged periods increases pests and bugs, raises the probability of damaged ductwork and insulation, and increases mold growth. Over time, depending on severity, this can also lead to foundation and structural issues from wood rot.

Most crawl spaces carry small, subtle issues for long periods that eventually compound into larger problems — often exacerbated by a season of extremely high humidity, extreme storms like hurricanes, or a water leak.

99.9% of the time, yes. It's very rare to see a crawl space in the Charlotte area that doesn't need some level of dehumidification.

Every crawl space needs some way for water to escape. In an extreme rain event or with high ground water, water that enters the crawl space needs an exit — either a sump pump or a daylight drain.

Schedule Your Free Consultation

A dry crawl space is the foundation of a healthy home.

The first step is a free telephone consultation with a specialist. It helps you understand your crawl space's specific moisture issues, what's needed to fix them, and what it will cost — including Pure Charlotte availability and pricing.

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Where We Work

We serve crawl spaces across Charlotte, NC & the Piedmont region.

A small, senior team — so we treat each crawl space like the only one we're working on this week. Currently accepting new clients across the greater Charlotte metro.

Charlotte Metro Core

Charlotte · Myers Park · Pineville · Mint Hill · Matthews · Indian Trail

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Lake Norman & North

Cornelius · Davidson · Huntersville · Mooresville · Denver · Concord · Harrisburg

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South & West Charlotte

Gastonia · Belmont · Lincolnton · Cherryville · Monroe · Salisbury · University Park · Fort Mill (SC) · Rock Hill (SC) · Lake Wylie (SC)

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Service coverage
Charlotte, NC & the Lake Norman / Piedmont region