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The S-Series Onground strips the pool back to what matters: engineered steel, shown by design. No architectural panels. No cladding. No pretense. Just the same aerospace-grade tubular steel platform that underpins every S-Series pool—set onground, finished with a high-performance polyurea coating in the custom color of your choice, and ready to hold water the day it arrives. It's the most direct expression of what an Ecopool is.
The Architectural Edition wraps itself in aluminum. The Canvas invites stone and stucco. The Onground does neither. Instead, it stands on its own — a fully engineered exterior built from structural steel, protected by a high-performance polyurea coating designed to resist corrosion, weather, and wear over time. Beneath the surface is a layered system doing real work: 80-ksi tubular steel for strength, insulation for performance, and a bonded protective finish that shields the structure from the elements. Just a clean, modern form that’s built to last — engineered from the inside out, and confident enough to show it.
Where other pools need an exterior layer to look complete, the Onground arrives finished. A high-performance polyurea coating is bonded directly to the steel structure in the color of your choice—matte charcoal, soft white, deep black, or a custom tone specified to match your home. The result pairs naturally with concrete patios, gravel yards, timber decking, and modern landscapes. It doesn't compete with your architecture—it complements it by refusing to imitate it.
The Onground is engineered to sit directly on a prepared pad—compacted gravel, a concrete slab, or a reinforced deck. No excavation required. No rebar, no gunite, no forming. The pool arrives fully assembled or in bolt-together modules, sets down on level ground, connects to plumbing and electrical, and holds water the same day.
For sites where excavation is impractical, prohibited, or simply unnecessary, the Onground eliminates the single biggest cost and delay in traditional pool construction.
Stronger Than 6" Gunite Pools
Faster Installation Than Traditional Pools
Cheaper to Maintain Than Gunite Pools
The Onground’s exterior is structural steel protected by a high-performance polyurea coating—engineered to resist corrosion, UV exposure, and everyday wear in harsh environments. From chlorinated splash to salt air to relentless Texas heat, this finish is designed to hold up without fading, peeling, or breaking down over time.
The coating is bonded directly to the steel in a wide range of color options—so what you see isn’t a cover-up, it’s the finished structure itself, built to last.
The S-Series Onground delivers the full S-Series platform—aerospace-grade steel, insulated core, intelligent water management—in its most direct form. No excavation, no exterior finish to maintain, and installation measured in hours, not months.
The Onground uses the same structural platform trusted across the entire S-Series line: a lattice of 80-ksi tubular steel, precision-welded into a rigid space frame that carries the full hydrostatic load without external reinforcement. Wall deflection under full water pressure measures less than 1/16 inch across 20 feet—six times stiffer than 8-inch gunite.
Dual polyurea-coated steel skins encase a closed-cell polyurethane core rated at R-10, creating a thermally sealed envelope that holds heat overnight and sheds excess warmth on summer afternoons. The difference is simple: on the Onground, those polyurea-coated skins—in the custom color you specify—are the exterior you see and touch.
Your pool should be effortless to manage. Ecopool arrives as a complete structure, with optional equipment so you choose exactly how your water is maintained. Add a chlorine injection system so your chlorine is delivered in small, consistent doses throughout the day—holding a steady ~0.5 ppm without tablets, salt systems, or constant adjustments.
Layer in UV-C and the system becomes even more efficient, reducing the load on chlorine while maintaining clear, balanced water. No salt buildup, no rising CYA, no chemical odor—just stable water and an interior that works with your chemistry, not against it, keeping the finish looking new for decades.
The Onground excels on sites where digging isn't practical or permitted—rocky terrain, high water tables, elevated decks, sloped lots, or properties with strict excavation restrictions. Prepare a level pad of compacted gravel or pour a simple concrete slab. Set the pool. Connect plumbing and electrical. Fill with water.
Single-module pools hold water the same day they're placed. Multi-module layouts typically assemble in under two days—no crane, no rebar, no weather delays. The timeline from delivery to first swim is measured in hours.
The Onground frame consumes 85 percent less raw material than a gunite shell of equal volume, yet carries greater load. R-10 insulated panels slash heat loss by up to 80 percent, micro-dosing chemistry trims chemical consumption by roughly 40 percent, and every steel tube, insulation board, and membrane sheet is fully recyclable when the time comes. Without excavation, there's no displaced earth to haul, no backfill to compact, and no landscape to rebuild.
Every Onground module is fabricated in a climate-controlled facility where CNC plasma tables cut each tube and hot-air welders seal every seam under repeatable conditions. Insulation is bonded, polyurea-coated steel skins are fitted in your chosen color, and the interior membrane is heat-welded before the pool ever meets your property.
Dimensional lasers confirm squareness and alignment prior to shipping. The pool arrives ready to set, connect, and fill—no field welding, no on-site fabrication, no guesswork.
The Onground inherits every efficiency built into the S-Series platform: continuous R-10 insulation that retains heat through cool Texas nights, variable-speed pumps that sip electricity, and optional solar integration that offsets the remaining draw across the year. Salt chlorinators, stabilizer tablets, fossil-fuel heaters, and fixed-speed pumps are excluded by design—replaced by smarter, quieter alternatives that keep operating costs near zero.
The exterior is polyurea-coated steel in the color of your choice—but step inside and you're standing on Ecopool's Architectural 3D Membrane. A textured, non-porous surface inspired by natural sandbars and layered stone, made from Zycore™, a German-engineered polymer composite that outperforms plaster, fiberglass, and tile in algae resistance, UV stability, and long-term color retention. The contrast is deliberate: custom-built character on the outside, refined material science within.
Step inside an Onground pool and your feet meet a surface shaped by German embossing technology—contours modeled on water-worn rock and layered sandstone pressed into a reinforced polymer sheet. The texture provides confident grip without the roughness of exposed aggregate, and smooth glide without the slipperiness of gel coat.
The membrane is non-porous, chemically inert, and maintenance-friendly: robotic cleaners track straight lines without snagging, algae finds no foothold, and the color you select on day one stays true for decades.
Zycore™ is the commercial-grade composite that gives the Onground its interior resilience. Flexible polymer layers fuse with a high-strength polyester matrix to deliver roughly 3,200 psi of tensile strength—four times what traditional renders achieve. Co-extruded UV stabilizers lock in color and structural integrity decade after decade, even under direct Texas sun.
No chalking like plaster. No crazing like fiberglass. No grout lines to scrub like tile. The inert, seamless surface stabilizes water chemistry from the inside out—pairing industrial steel on the outside with refined material science within.
The S-Series Onground exists for owners who value directness. No excavation to schedule. No cladding, stone, or siding to install or maintain. No months of construction turning a backyard into a worksite. The pool arrives from the factory in the custom color you chose, sets on a prepared pad, connects, fills, and swims.
Underneath that polyurea-coated steel exterior sits the same platform trusted across the entire S-Series line: insulated panels, precision-welded frames, and a Zycore™ interior that outlasts concrete, fiberglass, and tile. Smart water management keeps chemistry balanced with minimal intervention, while R-10 insulation and variable-speed equipment keep energy costs near zero.
From lakeside retreats to flat suburban lots, from modern industrial homes to Hill Country ranches—the Onground delivers the full S-Series experience without breaking ground.
Every S-Series pool shares the same aerospace-grade tubular steel architecture, insulated core, and intelligent water management. Choose the installation style that fits your vision.
Fully buried for a clean, traditional pool aesthetic. Flush with your patio and landscape — perfect for luxury backyards.
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Above-ground with sculptural aluminum composite panels and a minimalist silhouette. A bold architectural statement.
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Wrap the exterior in stone, stucco, brick, or any material. A cladding-ready structure that blends into your home.
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