Crawl Space Encapsulation + SuperSlurry
Crawl space encapsulation in CT and NY typically costs $3,500-$15,000 depending on size and moisture conditions. Full encapsulation - including vapor barrier, wall coverage, and vent sealing - is completed in 1-3 days.
Cleaner, Drier, Healthier Foundation for the Space Above.
Seal off your crawl space completely with American Dry Basement Systems’ Crawl Space Encapsulation + SuperSlurry wall treatment. This system creates a controlled, protected environment beneath your home—isolating it from damp soil, humid air, and water pressure so the space above stays more comfortable and consistent year-round.
- Cost
- $3,500-$15,000 (size and condition dependent)
- Timeline
- 1-3 days
- Warranty
- Covers vapor barrier installation
- Service area
- 12 counties across CT and NY
Why Crawl Spaces Cause So Many Problems
An exposed or poorly sealed crawl space can quietly affect your entire house:
Left alone, these issues don’t get better with time. Our Crawl Space Encapsulation + SuperSlurry system is built to stop moisture intrusion and give you long-term peace of mind.
- Persistent musty odors drifting upstairs
- Soft or buckling flooring above the crawl space
- High humidity makes your home feel sticky and uncomfortable
- Rusting ductwork, deteriorating insulation, and wood fatigue
- Frequent standing water during rain or snowmelt
Seeing one or more of these? A free inspection finds where the water is getting in before anyone quotes a fix.
Request a free inspectionBenefits You'll Notice Upstairs
Crawl Space Encapsulation + SuperSlurry doesn’t just make the crawl space look better—it changes how your entire home feels:
- Fewer musty odors
Are drifting into living areas
- More stable indoor comfort
Especially during humid months
- Protection for framing, insulation, and utilities
Under the house
What Is Crawl Space Encapsulation + SuperSlurry?
Before and after photos using crawl space encapsulation + SuperSlurry wall treatment.
Our system combines two powerful layers of protection:
SuperSlurry crystalline wall treatment
- A proprietary cementitious coating is applied to the interior crawl space walls (block, poured concrete, or stone).
- Penetrates into the wall surface and transforms the lower section into a dense, waterproof barrier.
- Targets the area where water and dampness are most likely to seep through.
Heavy-duty crawl space encapsulation system
- Thick, tear-resistant liner sealed across the entire crawl space floor and up the perimeter walls.
- Dimple board or drainage underlayment provides a stable, slightly elevated surface for the liner.
- All seams, piers, and edges are carefully sealed to create a continuous protective shell.
Together, SuperSlurry and encapsulation work as a single system: the walls are protected, the floor is sealed, and your crawl space is isolated from damp earth and outside air.
Step-By-Step: How We Encapsulate Your Crawl Space
Inspection and custom plan
One of our inspectors conducts a full evaluation of your crawl space, including wall type, height, access points, existing moisture, and any structural concerns. From there, we design a plan tailored to your home—encapsulation only, or encapsulation plus SuperDry subfloor drainage.
Optional SuperDry subfloor drainage (when needed)
- Carefully cut a narrow trench along the interior perimeter.
- Install corrugated drain pipe in washed stone to promote easy water flow.
- Set a sump pump basin in the lowest practical point.
- Install the appropriate sump pump station (primary only, primary + backup, or dual primaries for larger or more active spaces).
- Route the discharge line out and away from your foundation.
Wall preparation & SuperSlurry application
- Clean and prep the interior walls for coating.
- Apply our SuperSlurry crystalline treatment to the walls.
- This creates a dense, waterproof barrier that works in conjunction with the encapsulation liner.
Floor prep & underlayment
- Smooth and grade the crawl space floor to remove sharp edges and debris.
- Install a dimpled underlayment or drainage mat to create a stable base and controlled air space beneath the liner.
Encapsulation liner installation
- Roll out heavy-duty liner across the floor and up the walls.
- Seal all seams, posts, and penetrations with specialized tapes and adhesives.
- Mechanically fasten the liner to the walls above the SuperSlurry treatment for a continuous seal.
Vents, access, and finishing details
- Address old vent openings and gaps that allow humid outside air into the crawl space.
- Upgrade or seal the crawl space entry to match the encapsulated environment.
- Clean up the work area and review the finished space with you.
You’re left with a bright, clean, sealed crawl space that looks and feels like a controlled part of your home—not a forgotten cavity under your feet.
Encapsulation vs waterproofing
Crawl-space encapsulation is a sealed vapor-barrier and humidity-control system that isolates the home from ground moisture, used by Connecticut and New York homeowners when musty air, damp wood, or standing water is coming from under the house. Basement waterproofing is a different job. Waterproofing is a moisture-control system for a below-grade living space - typically an interior drain, sump, and wall treatment that stops groundwater from entering a basement you walk around in. Encapsulation seals the crawl cavity so humid soil air cannot rise into the rooms above. Waterproofing manages liquid water in a basement. Some houses need both: a wet crawl may still need drainage under the liner, and a home with a basement and a crawl can need each system in its own space. A free inspection is how we tell which one you have. Read more on basement waterproofing and our crawl space encapsulation cost guide, then schedule a free crawl inspection.
When Do You Add the SuperDry Subfloor Drainage System?
In many crawl spaces, encapsulation + SuperSlurry is all you need.
In more extreme situations, we may recommend adding our SuperDry subfloor drainage system underneath the encapsulation:
- History of standing water or frequent puddles
- High groundwater or seasonal water table changes
- Crawl spaces on a slope or near a ledge/stone that channels water
- Evidence of previous flooding or persistent seepage
When needed, the SuperDry System is installed first, below the liner:
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- A subfloor drainage trench runs around the perimeter (full or partial, depending on conditions).
- Corrugated drain pipe is surrounded by washed stone to collect water before it reaches the surface of your crawl space.
- The system directs water to one of our sump pump stations, which safely pumps it away from your home.
- The exterior discharge line is routed to suit your property’s footprint so water doesn’t simply recycle back.
Once this hidden drainage layer is in place, we encapsulate over it. Your crawl space looks clean and bright, while the heavy lifting happens out of sight beneath the liner.
Sump Pump Options for Your Encapsulated Crawl Space
Every crawl space is different. That’s why we offer several sump pump station setups when drainage is required:
- Primary pump only
For smaller or moderate-moisture crawl spaces
- Primary pump + backup pump with battery and Wi-Fi alerts
Adds a layer of protection if power goes out or a primary pump fails
- Two primary pumps
For larger crawl spaces or more extreme water conditions
Your inspector will match the pumping power and basin size to your crawl space so the pumps run efficiently instead of constantly cycling in a stress zone.
Ask your American Dry inspector to walk you through the best sump pump setup for your home during your free inspection.
Clear, Straightforward Coverage
We believe in simple, honest coverage at a glance:
- Our interior SuperDry drainage system is designed as a maintenance-free, built-to-last solution and comes with lifetime, transferable coverage against cracks & clogs.
- Primary sump pumps include a 5-year mechanical warranty.
- Backup pump, battery, and Wi-Fi systems include a 5-year mechanical warranty.
- 25-year warranty on our encapsulation liner for material durability and performance.
Your inspector will explain exactly what’s covered so you know how each part of the system is protected.
Basement Waterproofing Across Connecticut & New York
American Dry serves homeowners across Connecticut and the lower Hudson Valley in New York. Coverage depends on the project and your exact address.
plus the lower Hudson Valley
- Fairfield
- Hartford
- Litchfield
- Middlesex
- New Haven
- New London
- Tolland
- Windham
- Westchester, NY
- Rockland, NY
- Putnam, NY
- Dutchess, NY
Feedback should be as clear as the work.
Read verified homeowner stories, then browse current Google feedback from American Dry customers.
See homeowner reviewsOur Core Waterproofing Services
From a wet basement floor to a tight crawl space, we explain what is happening and recommend the right next step.
View all services
Basement waterproofing
Interior SuperDry drainage and sump-pump systems for basement water problems.
Crawl-space encapsulation
Sealing and encapsulation solutions built around the conditions below your home.
Sump pump installation
Pump, battery-backup, and monitoring options to help manage the water path.
Foundation crack repair
A closer look at the crack, the masonry, and the repair approach the condition calls for.
Schedule Your Free Inspection
Request a free inspection and get a straightforward look at the water path in your basement or crawl space.
(888) 748-2002
Local crew. Clear recommendations. Work you can see.