Crawlspace Repair in Upstate South Carolina

No! Houses need to dry, not breathe. You need to breathe, and your lungs would prefer clean air.

If your crawlspace shows signs of puddling water, a sump pump can be a big help in getting it out. It’s also a really good idea to have one in an encapsulated crawlspace, since water that gets on top of the liner has nowhere to drain. Some state building codes (like North Carolina’s) even require one in an encapsulated crawlspace so a plumbing leak has a way out. We can check for signs of water intrusion and standing water and help figure out the best way to keep things dry.

Yes, usually alongside a structural repair. Once the framing and support are fixed, encapsulation keeps moisture from undoing the work. Encapsulation is priced after we see the crawlspace, since height, access, debris, and whether a sump pump is needed all change the cost.

A vapor barrier is plastic laid over the dirt floor. Encapsulation goes further: the liner is sealed at the seams and edges and the vents are closed off, so the crawlspace is cut off from outside air and moisture.

Usually not, at least not in the Upstate. In summer, outside air is warm and humid. When it comes through open vents and hits the cooler wood, ductwork, and soil in the crawlspace, the moisture condenses. That’s why so many vented crawlspaces here have damp insulation, sweating ducts, and mold on the framing. Open vents often make a crawlspace wetter, not drier.

Closing the vents only helps if the crawlspace is set up for it: a sealed vapor barrier over the ground, gaps to the outside sealed, and some way to keep the air dry, like a dehumidifier. Closing vents over bare dirt just traps the moisture in. And if a gas furnace or water heater sits in the crawlspace, don’t seal it up without making sure that equipment still gets the combustion air it needs.

Ideally under about 60% relative humidity. Above that for weeks at a time, the wood starts soaking up moisture, and that’s when mold and, eventually, rot set in. In an Upstate summer, a vented crawlspace can sit well above that. An inexpensive hygrometer will give you a reading, but what we care about most is the wood itself. We check the framing with a moisture meter, and readings around 20% or higher mean the joists and girders are staying wet enough to cause problems. Bringing humidity down usually takes a combination of a sealed vapor barrier, closing off outside air, and a dehumidifier. If the framing has already been damaged, we repair that first.

Usually, yes. Most sagging and bouncy floors come from framing or support problems under the house. Support jacks, a new beam, or joist repairs fix them from below without tearing up your floors.

Most drywall cracks come from normal seasonal movement. Framing swells and shrinks with the humidity, and hairline cracks show up at the corners of doors and windows and along taped seams. Those are cosmetic. A crack is worth a closer look when it’s wider than about 1/8 inch, runs diagonally off a door or window corner, keeps coming back after it’s patched, or shows up along with sticking doors or sloping floors. In a house over a crawlspace, that pattern usually points to sagging joists, a failing girder, or settling piers underneath. Fix the support first, then patch the drywall, or the crack will be back. More on our drywall crack repair page.

Yes. We do crawlspace repair across the Upstate, including Spartanburg, Anderson, Greer, Simpsonville, Easley, Greenwood, Gaffney, and the lake communities. See the full service area below.