What crawl Space Vapor Barrier Installation involves in Mullins is the same as anywhere. What differs is the condition it is dealing with, and that is set by the ground the house sits on.
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 Mullins 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 Marion 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.
Mullins at a glance
| County | Marion County |
|---|---|
| ZIP | 29574 |
| Elevation | about 98 ft |
| Region | Lowcountry and coastal plain |
Named water nearby
- the Old River (lake)
- the Lumber River (stream)
- the River Swamp (swamp)
- Smoky Lake (lake)
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
What is included on a typical Mullins 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 cost of this work does not stay flat. Every season a Mullins crawl space stays wet moves more of the job from drying towards framing repair.
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 Mullins: common questions
There is already plastic under my Mullins 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.
Barrier or full encapsulation for a Mullins home?
A barrier covers the ground and stops soil moisture. Encapsulation seals the walls and vents too and controls humidity directly. Which one your Marion County property needs should follow a humidity reading, not a preference.
How do I know whether it is groundwater or a leak?
That is the first thing we establish on a Mullins call, because everything after it depends on the answer. A supply line, a drain, water rising through the soil and runoff coming in through the vents each leave different evidence.
How quickly does water under a Mullins 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 Marion County that window is shorter in summer than in winter, because the space stays warm and humid.
Why is my Mullins crawl space wet when nothing has leaked?
Near Mullins that is the normal pattern rather than the exception. At around 98 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.
Should the crawl space vents be closed?
It depends on your climate. In humid regions, open vents often bring in air that is wetter than the crawl space, which deposits moisture on cool surfaces instead of removing it — so sealing vents and controlling humidity mechanically usually performs better. In drier climates venting can work. This should follow readings, not a rule.
Vapor barrier near Mullins
We cover Mullins and the surrounding part of Marion County. The same service in nearby towns:
Other crawl space services in Mullins
Crawl Space Water Removal in Mullins
Standing water pumped and extracted from under the house, then the saturated material taken out.
Crawl Space Structural Drying in Mullins
Joists, girders and subfloor dried back to a measured target with air movers and dehumidification.
Crawl Space Mold Remediation in Mullins
Contained removal of mold-affected material, HEPA cleaning, and the moisture source shut off.
Crawl Space Drainage and Sump Pump Installation in Mullins
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 Mullins
Rotted joists, girders, rim joists and subfloor sections repaired or replaced once the space is dry.
Or see everything we cover in our Mullins service area, and how this service works across the state on the South Carolina page.
Crawl Space Vapor Barrier Installation in Mullins
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.