Wave pools offer high-end rental fleets. And in most cases, customers entering the premises are met with a classy display of all the high-demand models available. In this article, we won’t be geeking out on dims, entry rockers, or bottom contours, today we’re focusing on construction and durability. If you’re a shop renting out 50 boards per day, you want to know that your investment can withstand a collision with a concrete wall. That’s why old-school polyurethane foam and fiberglass, yes, the same construction board makers have used since the Gidget era, are notably absent from most surf parks today.
When a wave pool purchases a rental fleet, the goal is to find a balance between durability and performance. Durability is key. Boards taken out of the shop for repair don’t earn rental fees and eat up employee hours with ding fixes. Likewise, boards that don’t surf well stay put on shop racks, and worse, can sour the customer’s surf experience.
Thankfully, there are heaps of new and improved surfboard constructions out there. And they are making the rental fleet options better for surf park operators and their customers. So what is the latest in board construction technology today circa 2026? Let’s take a look.
We’ve rented CI shapes at several surf parks around the globe, including URBNSURF in Australia, where we first encountered their Spine-Tek construction. Spine-tek was designed with a special flex-control construction developed in collaboration with Shapers Australia. The technology replaces a traditional stringer with an engineered spine embedded in a stringerless EPS core. According to the company, the material “loads up on energy, provides pop, [and] accelerates out of turns whilst holding speed down the line.” Channel Islands claims the flex pattern remains consistent over time, unlike other materials (traditional wood stringers), which can lose their “pop.” One unique feature about Spine-Tek is that the width of the carbon center stripe varies by board volume: 1.5mm x 15mm for boards under 25.9 liters, 1.5mm x 30mm for boards 26.0 to 36.5 liters, and 1.8mm x 30mm for boards over 36.6 liters. The rest of Spine-Tek components are traditional epoxy construction.
The most prevalent surfboard brand found in today’s surf parks, Firewire rental fleets are comprised of three durable epoxy builds, Helium construction, and Volcanic.
Firewire’s Helium construction uses a stringerless 1.0‑pound EPS foam core with flex controlled by Paulownia and balsa wood rails that run from nose to tail. A 3mm proprietary composite deck skin covers the board. The company says the wood rails create “a loaded-up, spring-back feeling,” and the deck skins “rebound back to form after being compressed.” A Firewire spokesperson added that the material improves durability and maintains responsiveness over time. The construction overall is lightweight and durable, with performance characteristics very similar to traditional polyurethane builds.
Volcanic lamination technology uses basalt fiber, derived from crushed volcanic rock melted at approximately 1,500 degrees Celsius and extruded into woven cloth. The material has strength properties similar to carbon fiber but is positioned as a more sustainable alternative with a lower environmental impact. According to the manufacturer, the basalt cloth used in this construction offers improved durability and heat resistance, and provides greater elasticity for increased flex underfoot. The lamination includes a double 4 oz basalt cloth on the deck and a single 4 oz layer on the bottom. Volcanic lamination is compatible with both I-Bolic and Helium cores.
I-Bolic is a patented core construction featuring a 1.5-pound EPS foam core reinforced with an 18mm high-density foam stringer, 16mm high-density parabolic rails, and a 5mm bottom springer. The construction eliminates the need for external carbon layups or heavy laminations. According to the manufacturer, the I-Bolic design combines the stiffness of previous Linear Flex Technology with the flex and rebound properties of the Helium line. The deck includes a 3mm high-density composite skin sandwiched between two layers of 4 oz E-glass fiberglass. The bottom is capped with double 4 oz E-glass cloth. The I-beam structure is designed to enhance rigidity and break strength, while the parabolic rails manage flex and recoil through turns.
Bell Surfing includes designs by shapers Phil Grace and Christiaan Bradley. For wave pools, the company recommends Resilient Tech construction, which uses a sandwich board structure incorporating aerospace-grade resin and a 3mm aeronautic-grade deck skin for impact resistance and durability. The boards include an internal carbon T-stringer designed to replicate the natural flex of traditional surfboards. Additional carbon fiber and fiberglass reinforcements are layered to improve strength, energy return, and overall longevity. The construction is intended to maintain flex in key areas while reducing pressure dents and surface wear. You can find Bell Surfing at Alaïa Bay and Lost Shore Surf Resort.
Lib Tech’s ECO IMPACTO 2 LITE construction uses upcycled foam cores, Hexylite thermo fusion panels, and a plant-based Bio Matrix resin to reduce board weight from previous constructions by approximately one pound. The design incorporates G-glass and magnesium fiber laminates for strength and features glass-reinforced urethane “Hammerbox” fin boxes intended to withstand high-impact conditions. Atlantic Park Surf in Virginia Beach features a …Lost Surfboards/Lib Tech collab under the WRV/Mayhem branding.
XTR Epoxy is a closed-cell, waterproof foam construction developed in California and used by more than a dozen surfboard brands, including Pyzel and Sharp Eye. The extruded foam is designed for durability in high-impact environments such as wave pools. According to XTR’s Shey Yates, the material offers “exceptional speed, drive, and pop” while preserving the feel of traditional polyurethane and reducing the chatter often linked to Epoxy/EPS boards. Boards built with XTR can include various stringer and glassing options to adjust flex and responsiveness.
Ever the materials geeks, early wave pool proponents Lost Surfboards offer five different board constructions. However, LightSpeed II and BlackSheep are the ones most frequently found on wave pool rental racks.
LightSpeed II features high-tensile S-Glass along with Innegra, a lightweight, polypropylene-based fiber. A common complaint about epoxy builds is that they can chatter in bumpy water. Lost says their reinforced centerline strip contributes to a more predictable and stable flex pattern. Each board also includes a web-fused Innegra tail patch. As a bonus, this construction avoids carbon, reducing the board’s carbon footprint.
BlackSheep construction uses lightweight 1.5lb virgin EPS and incorporates “Triax-NCF” (Non-Crimp Fabric) carbon fiber. The “Triax” carbon is laminated only on the deck, with a short bottom lap, and is sandwiched between multiple layers of 4oz “D-size” fiberglass on both the top and bottom for durability and performance. Lost says the combination of Triax carbon and fiberglass gives BlackSheep boards a lively yet familiar feel.
“Multi-axial carbon fiber is a great alternative to traditional woven carbon fibers because it’s made of alternately aligned layers of unidirectional carbon reinforcement,” says Lost. “With the +30/-30° fabric orientation, the torsion force and pressure from the surfer’s feet radiate outward toward more of the rail line, creating greater drive, connection, and control through the edges and perimeter of the board.”
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