On a Mc Clellanville job, crawl Space Vapor Barrier Installation follows from the inspection rather than preceding it — there is no point specifying this work before the source of the water is known.
Bare soil under the house is evaporating moisture into the space every day.
Vapor barrier on lowcountry and coastal plain ground
A barrier earns its keep faster around Mc Clellanville than almost anywhere. With the water table close to the surface the soil underneath is damp more or less permanently, so an uncovered crawl space floor is evaporating into the space every day of the year.
Coastal Charleston County humidity is the other half of it. For much of the year the outside air here is wetter than the crawl space, so any approach that relies on ventilation to finish the job works against itself.
Mc Clellanville at a glance
| County | Charleston County |
|---|---|
| ZIP | 29458 |
| Elevation | about 3 ft |
| Region | Lowcountry and coastal plain |
Named water nearby
- the Harbor River (stream)
- the Romain River (stream)
- Oyster Bay (bay)
- Muddy Bay (bay)
Signs you need this
- Bare soil anywhere on the crawl space floor
- Existing sheeting that is torn, bunched or not sealed at seams
- Barrier that stops short of the walls and piers
- Crawl space relative humidity holding above 60 percent
What the work involves
The scope on a Charleston County property:
- Clearing and preparation of the crawl space floor
- Reinforced polyethylene barrier across the full soil area
- Overlapped and sealed seams
- Barrier carried up and sealed to walls and piers
Why it is worth dealing with now
The gap between a drying job and a structural repair in Mc Clellanville is usually measured in seasons, not years.
The full method and the step-by-step for this work is on the Crawl Space Vapor Barrier Installation page, and how it behaves across the state is on the Vapor barrier in South Carolina page.
Vapor barrier in Mc Clellanville: common questions
Will a barrier stop water that is already getting in?
No. A barrier manages soil moisture and vapor, not liquid water under pressure. If water is entering the space near the Harbor River, drainage comes first or the sheeting simply floats on it.
There is already plastic under my Mc Clellanville house. Is that enough?
Often not. Most of what we find has been laid loose, has torn, or was never sealed at the seams and walls. Unsealed sheeting performs much closer to bare soil than to a finished barrier.
How quickly does water under a Mc Clellanville 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.
Why is my Mc Clellanville crawl space wet when nothing has leaked?
Near Mc Clellanville that is the normal pattern rather than the exception. At around 3 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.
My house is near the Harbor River. Does that change anything?
It can. Being close to the Harbor 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.
What is the difference between a vapor barrier and encapsulation?
A vapor barrier covers the soil and stops ground moisture evaporating into the space. Encapsulation goes further — ground, walls and usually the vents are sealed and the space is brought inside the building envelope, normally with a dehumidifier to control humidity directly. Encapsulation does more and costs more.
Vapor barrier near Mc Clellanville
We cover Mc Clellanville and the surrounding part of Charleston County. The same service in nearby towns:
Other crawl space services in Mc Clellanville
Crawl Space Water Removal in Mc Clellanville
Standing water pumped and extracted from under the house, then the saturated material taken out.
Crawl Space Structural Drying in Mc Clellanville
Joists, girders and subfloor dried back to a measured target with air movers and dehumidification.
Crawl Space Mold Remediation in Mc Clellanville
Contained removal of mold-affected material, HEPA cleaning, and the moisture source shut off.
Crawl Space Drainage and Sump Pump Installation in Mc Clellanville
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 Mc Clellanville
Rotted joists, girders, rim joists and subfloor sections repaired or replaced once the space is dry.
Or see everything we cover in our Mc Clellanville service area, and how this service works across the state on the South Carolina page.
Crawl Space Vapor Barrier Installation in Mc Clellanville
Call (888) 724-1354 and tell us your street and what the space looks like. We will tell you whether this is the right stage to start at.
Tell us what you are seeing under the house and we will tell you what it needs.