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Thoms Bros Landscaping Creator and Keeper of Fine Landscapes


In 2021, High Format (formally known as Rosetta) had a soft release of their new wall, Grand Ledge™️ in their Fond du Lac and Slate Gray colors.  Grand Ledge™️ wall blocks create the look of natural ledgestone. Bold in scale and with consistent dimensions, these wall blocks allow for faster installation of retaining walls.  Combining the technology of their Outcropping wall system with the simple, linear style of our Kodah wall, High Format (HF) introduced the new Grand Ledge wall system in full scape this year (2022) in three colors Fond du Lac, Slate Gray and their new color Limestone. 

Grand Ledge™️ is an engineerable wall system with capabilities of 5’ to 6’ gravity wall with optimal site conditions.  This wetcast product includes technology that allow for detailed, natural looking textures, seamless blending of colors throughout and long-term structural integrity.  This product has 24 unique wall textures and four additional 5-sided blocks that can be used as a 90-degree return.

HIGH FORMAT® launched in 2007 is based in Charlevoix, Michigan started by the Manthei family.  HF is a newer name in the trade, but is equipped to shift the paradigm in the industry due to decades of experience.  In 1968, Manthei Construction was started in Northern Michigan specializing in underground systems, site development, mass grading, road construction and ready-mix concrete.  The Manthei family started Redi-Rock in 1999 for the industry’s need for massive retaining wall block.  Today Redi-Rock has grown into the industry leader in large block retaining walls, known as the engineering authority in the large block retaining wall industry.  There are 130 Redi-Rock manufacturers in almost every state, almost every province in Canada, plus many other countries throughout the world that are independently owned and licensed by Redi-Rock.

High Format (Rosetta Hardscapes) was created to bring a natural stone looking retaining wall to the industry but with a much easier installation process compared to natural stone.  HF’s goal is to consistently push the boundaries of the market consistently delivering groundbreaking products with larger dimensions and on-trend designs that deliver constant upgrades to any landscape environment.  As experts in innovation and the original engineers behind Rosetta® and Redi-Rock® products, HF could not be more excited to show the industry what the future holds.

Thoms Bros. as a contractor who has installed both natural ledgestone walls and HF’s Outcropping Wall system, knows the massive difference in time to install the man-made products.  Consistent height of material and the use of their lifting device and hooks on the material makes installation a much more easier process than natural stone.  For clients that want a natural look but cannot afford the labor costs for real stone, High Format’s Grand Ledge and Outcropping products are the way to go.

Grand Ledge w/Kodah Wall

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Grade Ledge w/irregular steps
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