Moisture Control in New Bern, NC
Local. Trusted. Experienced.
Most people in New Bern have never been in their crawl space. They find out something is wrong the way everybody does — a musty smell that won't leave the hallway, a floor that gives a little near the bathroom, or a home inspector coming back up the access hole with a look on his face.
We've been working under houses in this part of the state since 1998. Vapor barriers, foundation vents, humidistat fans, dehumidifiers, and full closed crawl space systems. Sometimes all of it. Often a lot less than what somebody else quoted.
Why Crawl Spaces Fail Here
Eastern North Carolina is about as hard on a crawl space as any place in the country. The water table sits high, especially anywhere near the Neuse or the Trent. The soil holds water. And from May through September the outside air carries dew points in the seventies.
That last part is the one that surprises people. Foundation vents were supposed to dry a crawl space out. In this climate, for a good part of the year, they do the opposite. Warm, wet summer air comes through the vents, hits floor joists and ductwork that are sitting cooler than the air around them, and gives up its moisture right there on the wood. You get condensation on the bottom of your subfloor in July with no leak anywhere on the property.
Add a hurricane season that has put water under a lot of houses in this county, and you have the standard eastern Carolina crawl space: damp wood, rusting duct straps, insulation hanging out of the joist bays, and a smell working its way up into the house.
Signs You Have a Moisture Problem
- A musty or earthy smell in the house, worst in closets, first thing in the morning, or when the HVAC kicks on
- Floors that feel soft or springy, especially near bathrooms and exterior walls
- Hardwood cupping, buckling, or gapping seasonally
- Doors and windows that stick in summer and work fine in winter
- Insulation fallen out of the floor joists and lying on the ground
- Visible growth on joists or subfloor — white, gray, black, or fuzzy
- Standing water, damp soil, or a vapor barrier with water pooled on top of it
- Rust on duct straps, plumbing hangers, or nail heads
- Higher power bills without a rate change
Any one of these is worth a look. Several together means you already know the answer.
Mold Is a Moisture Problem, Not a Cleaning Problem
Mold spores are in the air everywhere, indoors and out, and nearly every building material in your house will feed them. You cannot remove the spores and you cannot remove the food. What you can remove is the water.
That's the whole thing. Clean the growth off the joists without fixing the moisture and it comes back, usually within a season. Any company that quotes you a cleaning and stops there is selling you the same job twice.
When It Stops Being Mold and Starts Being Rot
Wood decay fungi are a different problem than surface mold. White rot — what a lot of folks call wet rot — takes hold when the moisture content of the wood reaches the fiber saturation point and stays there. Brown rot does its own kind of damage. Either one is structural. Once a girder or a joist end has gone soft, you're past treatment and into carpentry.
This is the reason not to sit on a damp crawl space for another two years. A vapor barrier is a manageable number. A sill plate and three joist ends are a different conversation.
The Crawl Safe Closed Crawl Space System
Closing a crawl space means sealing the vents, lining the ground and foundation walls, and controlling the humidity of the space with equipment instead of with outside air. Done right, the crawl space becomes part of the building envelope rather than a hole under your house that the weather gets a vote in.
What Goes In
- Clear out the debris, old insulation, and any organic material on the ground
- Correct standing water first — grading, a drain to daylight, or a sump, depending on the house
- Lay a heavy ground liner over all exposed earth, with seams lapped and sealed
- Run the liner up the foundation walls and the piers, sealed as it goes
- Seal the foundation vents and the access door
- Set a dehumidifier sized for the space, with the condensate drained outside the foundation
The Three-Inch Gap We Will Not Cover
North Carolina's residential code requires a clear, unobstructed inspection gap between the top of the wall liner and the bottom of the wood sill — three inches minimum. It exists so that a termite inspector can still see the top of your foundation wall.
That band of masonry is exactly where subterranean termites build their mud tubes on the way up into your floor system. Run the liner over it and you've hidden the one thing an inspector most needs to look at. We have found termite tubes behind liner installed by contractors who had no idea what they were covering.
We're a licensed structural pest company. We leave the gap, every time, and we'd suggest you ask any other bidder how they handle it before you sign anything.
When Encapsulation Is Not the Answer
Full encapsulation is the biggest ticket in this category, and it isn't what every house needs. Sometimes the fix is a downspout that's dumping against the foundation. We'll tell you that.
Vapor Barrier Only
For a lot of crawl spaces, polyethylene over the dirt is the first step and the cheapest one, and it does most of the work. Blocking ground moisture from rising into the wood and insulation solves a meaningful share of the problems we get called about.
Foundation Vents and Humidistat Fans
A humidistat-controlled fan moves air out of the crawl space when humidity climbs past a set point, and sits idle otherwise. On the right house it's a fraction of the cost of a closed system and it holds.
A Dehumidifier
Sometimes the space is fine but the humidity won't come down. A crawl space dehumidifier with the drain line run outside the foundation pulls the moisture out and puts it where it belongs. It can go in on its own or as part of a closed system.
We'll walk the crawl space, take readings, take pictures, and tell you which of these your house actually needs. If that's the cheap one, that's what we'll quote.
Moisture and Termites Are the Same Conversation
Subterranean termites need moisture. So do powder post beetles, old house borers, and every wood decay fungus we deal with. A wet crawl space isn't just a wet crawl space — it's the condition that makes your house worth attacking.
Which is why we'd rather one company handle both. When we're under your house for moisture work, we're also reading the foundation walls for mud tubes, checking the sill for damage, and looking at wood-to-soil contact. If we find something, you find out that day.
What North Carolina Code Requires
Closed crawl spaces are covered by Section R409 of the state residential code, and it's specific. A minimum 6-mil ground vapor retarder over all exposed earth, with seams lapped at least twelve inches. The floor graded so it drains to low spots, with a drain to daylight or a sump pump at each one. Crawl space drains kept separate from your gutter drains and foundation perimeter drains. Wall liner sealed at the edges and terminated three inches below the top of the masonry wall, with that termite inspection gap left open.
Converting a vented crawl space to a closed one is permitted work. Anyone quoting you a job that skips the permit is telling you something about how they'll do the rest of it.
Why Hire a Pest Company for This
Our team is fully licensed and trained by the N.C. Department of Agriculture's Structural Pest Control Division, is EPA certified, and is accredited as Wood Destroying Insect Inspectors by the N.C. Pest Management Association. Our technicians are state-registered specialists with five to fifty years each in the field.
The practical difference is that we read a crawl space for two things at once. Moisture and what moisture brings. A liner installed by someone who's never identified a mud tube is a liner installed by someone who might cover one.
Where We Work
New Bern, James City, Trent Woods, River Bend, Bridgeton, Havelock, Morehead City, Beaufort, Newport, Oriental, Trenton, and throughout Craven, Carteret, Jones, and Pamlico counties. Two locations, New Bern and Morehead City, and we're based at 2607 Old Cherry Point Road.
Questions Homeowners Ask Us
Get Your Crawl Space Looked At
We'll go under the house, take readings and photographs, and show you what's actually down there. Then we'll tell you what it needs — which is sometimes a lot less than you were expecting.
Get Your Crawl Space Looked At
We'll go under the house, take readings and photographs, and show you what's actually down there. Then we'll tell you what it needs.