Tandem® Wall System
A Simple Solution with a Sophisticated Look
The Tandem® Wall System by Belgard® offers versatile products that enhance landscaping potential, creating aesthetically seamless and easy-to-maintain spaces. It features multiple Face Styles that complement any hardscape and provides three innovative installation systems: Tandem Modular Block, Tandem Plastic Connectors, and Tandem Modular Grid. These systems enable the construction of attractive, curved, or straight retaining and freestanding landscape walls and structures, making it suitable for a wide range of residential and light commercial hardscape projects.

Face Styles:
The Tandem® Wall System is available in in multiple different face styles*:

Ashlar Tandem

Lamina Tandem

Melville Tandem
Installation Methods
Tandem Modular Block:
Ease and flexibility of The Tandem® Wall System now with a new method of installation
Features & Benefits:
- Three different veneer face styles
- Design flexibility
- Better stability during installation
- Limited job site space solution
- Connecting multiple blocks together to reinforce to make a higher wall without geogrid
- Easily construct reinforced corners by connecting multiple blocks
- One all-purpose plastic connector; retaining wall, double faced wall, setback wall, corners, curved wall and columns
Tandem Plastic Connector:
Features & Benefits:
- Gravity wall height up to 3 feet without surcharge and reinforced walls up to 8′
- 2.6 connectors per sq. ft. of wall
- Polypropylene Copolymer
- 2 connectors per unit
- Structural integrity in curved or straight walls
Tandem Omni Connector:
Features & Benefits:
- Coming soon
1) Tandem Modular Block:
Features & Benefits:
- Creates 21” x 21” square column
- Core can be used to fit a 4″ x 4″ post. Ideal for a pergolas posts or mailbox post.
- Open core is ideal for adding lights to any column
Base Block
U Start Base Block:
Features & Benefits:
- Built-in hand-holds for easy installation
- Installs quickly and easily for improved jobsite efficiency
- Strong, lightweight, and shaped to interlock to hold position
- Center core allows for aggregate interlock and frictional connection with base leveling pad
- Notches provide for easy alignment for straight walls and for a 6′ radius
- Provides a sturdy base level for curves, 90 degree corners, columns, or straight walls
Tandem Modular Block Resources

FSW Calculation Guide

SRW Calculation Guide

Tandem Column Info

Tandem Installation Guide

Tandem Modular – Grid Estimating Charts

Tandem Modular Block Information

Tandem Idea Book
Tandem Omni Connector
Design Studio
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Use our Project Guide to gather ideas, map a realistic timeline and budget, compare materials and patterns, and choose a contractor so projects come together smoothly.
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Outdoor living solutions for homeowners, contractors, and designers.
We’ll listen to your needs, help identify the right products and design approach, and guide you toward a tailored solution that brings your outdoor vision to life.