Crawlspace Vapor Barrier & Encapsulation in Charleston, SC
I'm a local owner-operator, not a franchise. I inspect your crawlspace for free, document it with photos and video, and send you a written line-item quote the same day.
- Vapor barrier from $0.90/sq ft — full pricing below
- You see the same photos and video I do — no surprise add-ons
- Text a photo of your crawlspace for a rough ballpark
Completed encapsulation with dehumidifier — Charleston, SC
Customer Reviews
What Charleston Homeowners Say
Real feedback from homeowners across the Lowcountry — from first call to finished crawlspace.
"Zach was out within two days of my call. He sent me photos of everything he found before even discussing the quote — I could see exactly what was going on under my house. Fair price, clean work, and the crawlspace looks completely different now."
"My home inspector flagged elevated moisture two weeks before closing. Coastal Crawlspaces got out the next day, gave me a written quote the same afternoon, and had the work done with full documentation in time for the reinspection. Saved my closing."
"I got three quotes. Two companies wanted to sell me full encapsulation. Coastal Crawlspaces told me I only needed a vapor barrier — and explained exactly why. That honesty alone was worth the call. Excellent work, came in under what the others quoted for more."
Charleston Moisture Control
Complete Crawlspace Moisture Control for Lowcountry Homes
The Lowcountry is hard on crawlspaces. Between the humidity, the high water table, and the age of much of our housing stock, moisture finds its way in. Here's what that looks like — and how I fix it.
Why it happens here
Charleston sits in a humid subtropical climate with a high water table and marsh all around us. Many homes — especially older raised houses in places like West Ashley, James Island, and downtown — were built before modern moisture control was standard. Warm, wet air moves through an open crawlspace all year, and bare soil underneath wicks groundwater straight up into the space.
Left alone, that damp air rises into the living space, drives up your power bill as your HVAC fights the humidity, and quietly works on the wood your house is sitting on.
What it causes — and the fix
- Musty smells and higher humidity upstairs
- Mold, wood rot, and soft subflooring
- Flagged moisture on a home-inspection report
- Power bills higher than they should be
The fix is a layered approach: a sealed ground vapor barrier first, then wall liner and pier wraps where the space needs full encapsulation, interior drainage for active water, and a dehumidifier through my licensed HVAC partners when the space needs to be fully conditioned. I'll recommend what your house actually needs — not the most expensive package.
Services
What I Do
Crawlspace moisture work, start to finish. Every quote is written, line-item, and honest about what your house actually needs.
Vapor Barrier Installation
Best for: most Charleston crawlspaces with damp soil and no existing barrier.
10, 14, and 20 mil options with full ground coverage. Seams overlapped a minimum of 6" and fully taped. The fastest, most cost-effective fix for most homes in the Lowcountry.
From $0.90/sq ft (10 mil) · $1.30/sq ft (14 mil) · $1.70/sq ft (20 mil)
Crawlspace Encapsulation
Best for: problem spaces with high humidity, mold history, or that you want fully conditioned.
Heavy-duty barrier, sealed wall liner, and wrapped piers, with licensed HVAC partners handling dehumidifier installation. Complete moisture control for the crawlspaces that need it.
Wall liner $5/linear ft · pier wraps $45 each
Cleanout & Debris Removal
Best for: old torn barrier, fallen insulation, construction trash, or standing water.
Cleared out and disposed of properly through licensed C&D facilities, and always quoted as a separate line item so you see exactly what it costs.
Quoted per job · itemized in your written estimate
French Drain Installation
Best for: homes with active water intrusion or grading that pushes water under the house.
Interior crawlspace drainage sized to handle the volume Charleston storms actually bring, routed to a proper discharge point.
$55/linear ft
Free Moisture Inspections
Best for: anyone unsure what they've got — especially after a rough inspection report.
I crawl the whole space, document everything with photos and video, and walk you through it plainly. No charge, no pressure, no obligation to hire me.
Free · same-week scheduling
Inspection Repair Work
Best for: agents and homeowners on a closing deadline.
If your inspector flagged standing water or elevated moisture, I handle the crawlspace repair items with photo and video documentation for your agent and closing file.
Same-week turnaround
Straightforward Pricing
What It Costs — Published Right Here
Most companies make you sit through a sales pitch to hear a number. Here's mine up front.
Most vapor barrier projects in Charleston run $1,350–$2,550 depending on size, material, and condition. Cleanouts are quoted separately.
- Full ground coverage
- Seams overlapped & taped
- Right choice for most Lowcountry homes
- 1,500 sq ft ≈ $1,350 total
- Heavy-duty reinforced film
- Handles storage & foot traffic
- Longer service life
- 1,500 sq ft ≈ $1,950 total
- Maximum thickness & durability
- Best for high water table areas
- Encapsulation-grade protection
- 1,500 sq ft ≈ $2,550 total
All Service Pricing
| Service | Price |
|---|---|
| 10 mil vapor barrier, installed & seams taped | From $0.90 / sq ft |
| 14 mil reinforced vapor barrier | $1.30 / sq ft |
| 20 mil vapor barrier | $1.70 / sq ft |
| Wall liner (encapsulation) | $5 / linear ft |
| Pier wraps | $45 each |
| Interior French drain | $55 / linear ft |
| Crawlspace inspection with photo/video report | Free |
Example: a typical 1,500 sq ft crawlspace with 10 mil barrier comes to about $1,350. Minimum job is $1,500. Have a written quote from another company with comparable scope and materials? Send it over — I'm happy to take a look.
Finished Work
Before & After: See the Difference
Every job is photo-documented from start to finish. Here's what it looks like before we start and after we're done.
Before
After
The Difference
Why Work With a Local Operator
When you call a national company, you often get a salesperson first and a crew you've never met later. With me, it's one person from the first crawl to the final cleanup.
About
Local. Honest. Done Right.
I'm a Charleston native, born and raised in the Lowcountry. I started Coastal Crawlspaces because I watched too many neighbors here get talked into full encapsulation packages by out-of-town franchises when a vapor barrier was all the house needed. That's not how I work.
I'm a local owner-operator. When you call, you get me — not a call center. I do the inspection, the install, and the cleanup myself. Because my overhead stays low, I can bring franchise-quality work in at a fraction of what the big national companies charge — and still take the time to do it right. And because my name is on the business, I document every job with photos and video, so you always know what's under your house.
I'll tell you honestly what your crawlspace needs — even when the answer is less work than you were quoted elsewhere.
— Coastal Crawlspaces
- Charleston native Born and raised in the Lowcountry.
- Fraction of franchise pricing Rates listed on this page — no pitch required.
- Every job documented Photos and video for your records.
How It Works
Simple, Start to Finish
STEP 1
Free inspection
I crawl the whole space and document it with photos and video. Same-week scheduling.
STEP 2
Written quote
You get a line-item quote the same day, with the photos, so you know exactly what you're paying for and why.
STEP 3
The work
I do the install myself. Most vapor barrier jobs are wrapped up efficiently, with the space left cleaner than I found it.
STEP 4
Photo record
You get before-and-after documentation for your files — handy for resale, insurance, or an agent's transaction file.
For Real Estate Agents
Crawlspace Repairs That Keep Your Closing on Track
When an inspection turns up elevated moisture or standing water days before closing, you need someone who moves fast and documents the work.
- Same-week turnaround on inspection repair items
- Photo and video documentation for your transaction file
- Written line-item invoices for the transaction record
- Pre-listing moisture work so it never shows up on the buyer's report
Quick reference
Every Job Is Backed by a One-Year, Make-It-Right Guarantee
I stand behind every job. If the installation doesn't meet the standards described or you find an issue within the first year, I'll come back and make it right — no runaround, no upsell, no charge. My reputation depends on it.
Service Area
Where I Work
I'm in crawlspaces across the Charleston metro every week. If you're in the Lowcountry, there's a good chance I can get to you.
- Charleston
- Mount Pleasant
- West Ashley
- Summerville
- North Charleston
- James Island
- Johns Island
- Daniel Island
- Goose Creek
- Hanahan
- Isle of Palms
- Sullivan's Island
- Folly Beach
- Ladson
- Awendaw
A lot of my work is older raised homes near the marsh and newer construction with minimal moisture control. Don't see your neighborhood? Call — if you're near the metro, I can usually make it work.
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Straight Answers
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Do you handle repairs from home inspection reports?
Why is crawlspace moisture such a problem in Charleston?
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Already had work done?
A quick Google review helps other Charleston homeowners find a local option they can trust.
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