Taken on its own, crawl Space Vapor Barrier Installation treats one part of the problem. Taken in order, it is the part that makes the rest hold. That is how we schedule it on Cross jobs.
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 Cross 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 Berkeley 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.
Cross at a glance
| County | Berkeley County |
|---|---|
| ZIP | 29436 |
| Elevation | about 79 ft |
| Region | Lowcountry and coastal plain |
Named water nearby
- Lake Moultrie (reservoir)
- Lawson Pond (lake)
- Wassamassaw Swamp (swamp)
- Kirk Swamp (swamp)
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
For a Cross crawl space, the work covers:
- 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
Waiting is the expensive option here. Moisture that has been under a Cross floor for a year has already changed what the repair involves.
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 Cross: common questions
Barrier or full encapsulation for a Cross home?
A barrier covers the ground and stops soil moisture. Encapsulation seals the walls and vents too and controls humidity directly. Which one your Berkeley County property needs should follow a humidity reading, not a preference.
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 Lake Moultrie, drainage comes first or the sheeting simply floats on it.
Does being close to the coast make this worse?
It raises the water table and lengthens the wet season, which is why homes near Lake Moultrie and the low ground around Cross tend to need drainage as well as a barrier.
My house is near Lake Moultrie. Does that change anything?
It can. Being close to Lake Moultrie 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.
Why is my Cross crawl space wet when nothing has leaked?
Near Cross that is the normal pattern rather than the exception. At around 79 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.
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 Cross
We cover Cross and the surrounding part of Berkeley County. The same service in nearby towns:
Other crawl space services in Cross
Crawl Space Water Removal in Cross
Standing water pumped and extracted from under the house, then the saturated material taken out.
Crawl Space Structural Drying in Cross
Joists, girders and subfloor dried back to a measured target with air movers and dehumidification.
Crawl Space Mold Remediation in Cross
Contained removal of mold-affected material, HEPA cleaning, and the moisture source shut off.
Crawl Space Drainage and Sump Pump Installation in Cross
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 Cross
Rotted joists, girders, rim joists and subfloor sections repaired or replaced once the space is dry.
Or see everything we cover in our Cross service area, and how this service works across the state on the South Carolina page.
Crawl Space Vapor Barrier Installation in Cross
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.