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 Ulmer jobs.
Bare soil under the house is evaporating moisture into the space every day.
Vapor barrier on midlands and sandhills ground
Around Ulmer the soil dries at the surface and stays damp below, which makes a bare crawl space floor deceptive: it can look dry while still feeding moisture upward. Sealing the ground is what stops that, and the seams and pier wraps are what make the sealing real.
Humidity does the slow damage here. A Ulmer crawl space can be dry in winter and damp by late summer without anything having failed, which is why this work is paired with humidity control rather than ventilation.
Ulmer at a glance
| County | Allendale County |
|---|---|
| ZIP | 29849 |
| Elevation | about 161 ft |
| Region | Midlands and Sandhills |
Named water nearby
- Tutens Millpond (reservoir)
- the Miller Swamp (stream)
- the Wells Branch (stream)
- the Caddins Branch (stream)
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 Allendale 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 cost of this work does not stay flat. Every season a Ulmer 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 Ulmer: 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 Tutens Millpond, drainage comes first or the sheeting simply floats on it.
There is already plastic under my Ulmer 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.
What should I have ready when I call about my Ulmer home?
Your street in Ulmer, when you first noticed it, and what you can see or smell — standing water, a waterline on the piers, insulation hanging down, or a floor that has gone soft. Photographs help.
Can I stay in the house while the work is done?
In almost all cases, yes. The work happens under the floor, and access is usually through an exterior hatch. We will tell you up front if anything about your Ulmer property changes that.
Will my Ulmer crawl space dry out if I open the vents?
Usually not. For much of the year the air around Ulmer is warmer and wetter than the crawl space, so opening it up deposits moisture on the cool joists instead of carrying it away.
I already have plastic down there. Is that enough?
Often not. Most of the sheeting we find has been laid loose, has torn, has pulled away from the walls or was never sealed at the seams. Unsealed, incomplete sheeting lets ground moisture track around and through it, and performs much closer to bare soil than to a finished barrier.
Vapor barrier near Ulmer
We cover Ulmer and the surrounding part of Allendale County. The same service in nearby towns:
Other crawl space services in Ulmer
Crawl Space Water Removal in Ulmer
Standing water pumped and extracted from under the house, then the saturated material taken out.
Crawl Space Structural Drying in Ulmer
Joists, girders and subfloor dried back to a measured target with air movers and dehumidification.
Crawl Space Mold Remediation in Ulmer
Contained removal of mold-affected material, HEPA cleaning, and the moisture source shut off.
Crawl Space Drainage and Sump Pump Installation in Ulmer
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 Ulmer
Rotted joists, girders, rim joists and subfloor sections repaired or replaced once the space is dry.
Or see everything we cover in our Ulmer service area, and how this service works across the state on the South Carolina page.
Crawl Space Vapor Barrier Installation in Ulmer
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.