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5-Degree, Grid-based Flat Roof System for Commercial Installations

Build it right the first time—with GRIDFLEX®

Overview

GRIDFLEX® 5 is a flat roof solar mounting system engineered for speed, strength, and simplicity. Leveraging Unirac’s two decades of solar innovation, this rail-based solution delivers maximum design flexibility with fewer components and lower ballast. Its preassembled, torqueable clamps and modular grid layout streamline installation while boosting structural integrity. Wind tunnel tested and field-proven, GRIDFLEX 5 is built to accelerate deployment without compromising performance or security. 

Installs on
Ballasted
Gravel
Membrane
Mineral Cap Tar

Key Features & Benefits

Modular Grid Structure

Shared rails and structural connections reduce ballast and enhance load distribution. 

Low Profile, Aerodynamic Design

Reduces wind uplift; wind deflectors only needed at north edge. 

Fast Installation

Preassembled stanchion and module clamps with single-tool assembly save time on the roof. 

Secure, Reliable Connections

Hinged clamps grip both sides of the module frame with torqueable, checkable fasteners. 

Optimized for Flat Roofs

Ballast fits fully beneath modules in integrated trays for a clean, efficient layout.

Proven Durability

Wind tunnel tested, UL 2703 certified, and backed by a 25-year warranty. 

Flexible Layout Options

Modular design supports easy customization to project needs.

Patented

This product may be protected by one or more U.S. Patents. Visit our patent page to learn more.

System Components

To build a fully functional GRIDFLEX 5 system, the following components are required: 

RAILS
SOUTH RAIL

The South Rail runs perpendicular to the Module Connectors, adding rigidity to the system and providing support for the south row of modules. Each rail features printed installation guides that simplify placement of South Clamps, row attachments, and overlap measurements for faster, more accurate installs. 

RAILS
South Rail Extender 

The South Rail Extender supports the south row of modules while providing mounting locations for South Clamps, south row attachments, and ballast installed south of the array. Printed guides simplify rail overlap measurements for faster, accurate installs. 

RAILS
MID RAIL

The Mid Rail provides support for field modules while increasing system stability. Each rail includes printed installation guides to ensure precise placement of South Clamps, North Stanchions, Ballast Rails, attachments, and overlap measurements, streamlining the installation process. 

RAILS
NORTH RAIL

The North Rail supports the north row of modules and strengthens overall system stability. Printed installation guides on each rail provide clear direction for North Stanchions, Ballast Rails, and attachments, ensuring fast and accurate installs. 

RAILS
BALLAST TRAY

The Ballast Tray holds ballast blocks beneath the module, distributing weight evenly and enhancing system load sharing for improved stability. 

CLAMPS
SOUTH CLAMP

The South Clamp secures the south edge of the module to the base rails with a clevis pin connection, allowing the module to hinge open for easy access beneath the panel. 

CLAMPS
NORTH CLAMP

The North Clamp secures the north edge of the module to the base rails, creating a fixed 5° tilt for reliable system alignment and stability. 

WIND DEFLECTORS
WIND DEFLECTOR

The Wind Deflector attaches to the North Stanchion to reduce wind uplift forces and enhance system load sharing for greater overall stability. 

ACCESSORIES
ROOF PAD

The Roof Pad mounts to the base rail to protect roof surfaces and provide slip resistance, helping stabilize the system. 

ACCESSORIES
MID-SUPPORT

The Mid-Support attaches to the return flange of the module’s north and south edges, adding reinforcement at the center of the module frame for increased stability. 

Attachments & ACCESSORIES

MLPE Mounts

Unirac’s MLPE Mounts offer a secure solution compliant with the UL 2703 standard for attaching microinverters and power optimizers directly to module frames….

Finishes
Mill
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Membrane
RAYTRAY™

Optimize your rooftop cable routing with RAYTRAY™—a modular, enclosed wire management system designed for commercial flat roof solar arrays. Built from…

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Gravel, Membrane, Mineral Cap Tar
ECOMOUNT® 1 & 2 INVERTER KITS

The EcoMount 1 Inverter Kit (holds two mounts) and EcoMount 2 Inverter Kit (holds three mounts) are universal clamp solutions engineered for secure, flexible…

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Membrane
FLASHLOC® RM

FLASHLOC® RM is Unirac’s most robust and versatile roof attachment for flat roof solar applications. Designed for speed, strength, and simplicity, this…

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Resources

Technical Documentation