PSL Custom Wine Cellar handles wine cellar waterproofing for cellars that have started showing signs of water getting where it should not. Summer storms here can drop several inches of rain in a single afternoon, so even a slab-on-grade room can take on water from below or through the walls.
Waterproofing deals with liquid water, which is a different job from the vapor barrier that handles humid air. Most cellars on the Treasure Coast need both, layered correctly so one does not trap moisture behind the other.
Common trouble spots include:
Every waterproofing job is water tested before the racks and finishes go back in, so problems show up while they are still easy to fix. Homeowners and businesses in Port St. Lucie, Indrio and Port Mayaca count on that test to keep their collections high and dry.
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These design concepts show how water finds its way into cellars in different ways, from flooded slabs to storm-soaked exterior walls.

DESIGN CONCEPT · OAK HAMMOCK
An event venue near Oak Hammock stored its wine in a slab-on-grade room that took on an inch of water whenever a summer storm stalled overhead. The concept regrades the ground outside, adds a crystalline waterproof coating to the slab and lower block walls and installs a perimeter drain tied into a sump. Racks now sit on raised stainless legs, so the room is ready for tropical storm season.
Estimated budget: $33,000
Estimated timeline: 4 to 6 weeks

DESIGN CONCEPT · LYNGATE
A Lyngate homeowner kept finding damp cardboard and white mineral stains along the bottom of her cellar walls. Moisture was wicking up through an unsealed slab and into the block. The plan seals the floor with a penetrating moisture barrier under new porcelain tile, coats the lower walls with a waterproof membrane and adds a 6-inch stainless kick plate below the racks.
Estimated budget: $11,200
Estimated timeline: 2 weeks

DESIGN CONCEPT · SANDHILL CROSSING
This Sandhill Crossing cellar shares a stucco exterior wall that let wind-driven rain seep in behind the racks during every summer storm. The concept takes the racks down, repairs the cracked stucco outside and applies an elastomeric waterproof coating before a new vapor barrier and moisture-resistant board go in on the inside. The original mahogany racks then go back on a dry wall.
Estimated budget: $14,700
Estimated timeline: 2 to 3 weeks

01
Restaurants, venues and shops often store wine in ground-floor back rooms that were never built to stay dry. Floors, lower walls and drains are sealed so a summer downpour does not turn into lost inventory.
02
Unsealed concrete slabs pull moisture up from the ground all year long. A penetrating sealer or membrane under new tile stops it well before it reaches the racks.


03
Block walls shared with the outside of the house can let water through hairline cracks. A waterproof coating on the wall, along with stucco or flashing repairs outside, keeps it out.
04
Water that pools against the house will eventually find a way in. Regrading, gutters and a perimeter drain carry it away before it ever becomes a problem.


05
Rooms set below grade need a bonded exterior membrane, drain tile and a sump with battery backup. Those layers work together against the high water table common in this area.
06
When water has already gotten in, damaged drywall, insulation and flooring are removed and the source is fixed. The room is then rebuilt with moisture-resistant materials and tested before the racks go back.

Water tested before finishing:
Every job is checked with a hose or flood test.
Layers in the right order: Waterproofing and vapor control are installed so nothing gets trapped.
Outside and inside fixes:
Stucco, flashing and grading are handled along with the cellar itself.
Sealing the slab and lower walls during a new build usually adds about $2,500 to $6,000. Fixing an existing cellar with water problems costs more, often $10,000 to $35,000 once racks, flooring and drainage are involved.
On a new build, waterproofing adds 2 to 4 days to the schedule. Repairs to an existing cellar usually take 2 to 6 weeks, since coatings need time to cure before the racks go back in.
Slabs and lower walls get a liquid-applied waterproofing membrane, and below-grade walls get an exterior membrane with drain tile where needed. A 6-mil vapor barrier then handles the humid air.
Waterproofing stops liquid water like rain or groundwater, while vapor control stops humid air from moving through the walls. Most cellars need both.
Yes. The 2-year workmanship warranty covers the waterproofing installed by the crew, so a seam or coating that fails from the install gets fixed at no cost.
It can, but it is a gamble. Sealing the slab and lower walls during construction costs far less than tearing out racks and flooring after a leak.