Coastal Charleston County construction is built up off the ground for a reason, and in flood zones that is a requirement rather than a preference. The result is that Charleston homes of every age have a crawl space under them, and every one of those spaces has to manage moisture it did not ask for.
The practical consequence is that venting a crawl space here usually makes it damper. For much of the year the outside air is warmer and wetter than the space, so open vents deposit moisture on the cool joists instead of carrying it away.
New timber fitted into a crawl space that is still wet starts absorbing moisture the day it goes in. That is why repairs wait until the readings say the space is dry — in Charleston as everywhere else.
Signs worth acting on
Any one of these is reason enough to have the space under your Charleston home looked at.
- Air in the house that smells of damp soil, especially in summer
- Springy or sloping floors over part of the house
- Hardwood boards lifting at the edges or pulling apart
- Visible water, mud or standing damp under the floor
- Rusty fixings, or dark staining on the joists
- Windows and doors that stick in humid weather
Water near Charleston
Named water close to Charleston. On the coastal plain, proximity usually means a higher water table and a longer wet season under the floor.
- the Ashley River (stream)
- the Cooper River (stream)
- Colonial Lake (lake)
- the Wando River (stream)
Charleston sits at about 10 feet, in the Lowcountry and coastal plain of South Carolina.
Crawl space services in Charleston
Each of these is available for Charleston homes, and each has its own page covering how it works here.
Crawl Space Water Removal in Charleston
Standing water pumped and extracted from under the house, then the saturated material taken out.
Crawl Space Structural Drying in Charleston
Joists, girders and subfloor dried back to a measured target with air movers and dehumidification.
Crawl Space Mold Remediation in Charleston
Contained removal of mold-affected material, HEPA cleaning, and the moisture source shut off.
Crawl Space Vapor Barrier Installation in Charleston
Sealed polyethylene over the soil and up the piers, so ground moisture stops entering the space.
Crawl Space Drainage and Sump Pump Installation in Charleston
Interior drainage to collect water, a sump and pump to lift it, and a discharge that takes it away.
Crawl Space Wood and Subfloor Repair in Charleston
Rotted joists, girders, rim joists and subfloor sections repaired or replaced once the space is dry.
Our Charleston service area
We cover Charleston and the surrounding part of Charleston County, including the area around Charleston Historic District and White Point Gardens. Nearby we also work in James Island, Mount Pleasant and Sullivans Island.
Nearest towns we also cover
The rest of Charleston County
We cover every town in Charleston County. See all 407 South Carolina towns.
Charleston crawl space questions
Why is my Charleston crawl space wet when nothing has leaked?
Near Charleston that is the normal pattern rather than the exception. At around 10 feet on the coastal plain, the water table sits close enough to the surface that soil under the house can be saturated with no pipe broken.
Does storm flooding reach crawl spaces around Charleston?
Yes, and often with nothing visibly broken. After a tropical system the usual picture in Charleston County is a saturated crawl space where the water came up through the ground rather than out of a pipe.
Does being close to the coast make this worse?
It raises the water table and lengthens the wet season, which is why homes near the Ashley River and the low ground around Charleston tend to need drainage as well as a barrier.
My house is near the Ashley River. Does that change anything?
It can. Being close to the Ashley River usually means a higher water table and a longer wet season under the floor, so drainage and a properly sealed barrier matter more here than they would further from it.
How quickly does water under a Charleston house need to come out?
Quickly. Wood starts absorbing moisture immediately and mold can establish on damp material within roughly 24 to 48 hours. In Charleston County that window is shorter in summer than in winter, because the space stays warm and humid.
Crawl space problem in Charleston?
Call (888) 724-1354 and tell us what you are seeing under the house. You will get a straight answer about what the space needs.
Tell us what you are seeing under the house and we will tell you what it needs.