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UNI-GROUP U.S.A. is one of the leading interlocking concrete paver associations in the country with over 30 years experience in the design and production of concrete pavers. With more than 35 manufacturers nationwide, UNI-GROUP U.S.A. has earned a reputation for quality and excellence that is unmatched in the concrete paver industry.

We are the leading manufacturers of permeable interlocking concrete pavers (PICP), with several styles to chose from. Our permeable pavers offer superior interlocking features for more structural stability under loading.

We offer unsurpassed technical and design expertise, proven product performance, and a commitment to the highest level of quality production.
By utilizing the latest technology, we can offer designers, architects, engineers, and developers more styles, colors, and finishes of concrete pavers, as well as other specialty concrete hardscape products such as grid paving, segmental retaining wall systems, edging, and patio products. And for the homeowner, UNI® products offer the best in quality, beauty and value.

F. von Langsdorff Licensing Limited Celebrates 40th Anniversary

F. von Langsdorff Bauverfahren GmbH was founded in Germany by veteran engineer Fritz von Langsdorff in 1964 in order to license a new interlocking concrete paver shape - the original UNI-STONE®. Little did he know that in subsequent decades it would become the world's most successful concrete paver shape.

The use of segmental paving has a long history and can be dated back more then 5,000 years to the Minoans on the island of Crete, but it was not until the advent of precast concrete pavers that their use became commonplace. These modern pavers, with their tight dimensional tolerances and increased structural strength, made it possible to offer designers alternatives in terms of better performance, pleasing aesthetics and lower costs. The invention of the shaped interlocking concrete paver in Germany, especially the UNI Product Line, had tremendous success and in the 1960s a period of rapid growth commenced within the German UNI Licensing Group.

Soon after their initial introduction in Germany, UNI Pavers were licensed in other countries. These unique pavers was introduced to North America in 1973, heralding the founding of the UNI-GROUP U.S.A. In 1983, the Canadian office known as F. von Langsdorff Licensing Limited was established in Toronto to better serve the needs of the North American Licensee. It is now headed by Harald von Langsdorff, the son of Fritz von Langsdorff.

In 1989, F. von Langsdorff Licensing brought the first permeable interlocking concrete paver (PICP) to North America with the introduction of UNI Eco-Stone®. SInce then, Harald has expanded the permeable product line with the introduction of several other patented products - Ecoloc®, Eco-Optiloc® and Eco-Priora®. For more than 25 years, the Eco-Stone Family of Permeable Pavers have been the choice of engineers and other design professionals for residential, commercial and municipal applications across the country.

Congratulations to Harald and F. von Langsdorff Licensing on serving the world-wide interlocking concrete paver industry for 40 years! 

Congratulations to ICPI on 20-Year Anniversary

F. von Langsdorff Licensing Limited and UNI-GROUP U.S.A. would like to congratulate the Interlocking Concrete Pavement Institute and its members on their 20th Anniversary and thank you for your contributions to the paver industry over the years. 

UNI-GROUP is a Founding Member of Greenroads

Lastest Greenroads Manual Now Available -
click here

Greenroads is a sustainability rating system for roadway design and construction. It is applicable to all roadway projects including new, reconstruction and rehabilitation (even overlays), bridges, you name it. If it is a project where a road is involved, you can use it.

Greenroads is a collection of sustainability best practices, called "credits," that relate to roadway design and construction. Achieving these credits can earn points toward a total score for the project, and in general, this Greenroads™ score can be used as an indicator of sustainability for the roadway. Four different certification levels (rating) are available depending upon total score on a voluntary basis.


For information outside North America, please visit www.uni-international.de.

New Presentation on Eco-Priora Winter Testing
The University of Calgary, University of Victoria, City of Calgary, the National Sciences and Engineering  Research Council of Canada and Urban Systems sponsored a study of Eco-Priora permeable paver performance under extreme winter conditions. Click here for the presentation.

New Eco-Priora Permeable Paver Video
Pavement consulting engineer John Knapton dicusses the use of Eco-Priora permeable pavers under heavy loads and cost savings - by UNI producer Marshalls in Britain.Read more.

Pavestone Colorado Project Achieves LEED Platinum
Eco-Priora Permeable Pavers contributed to a LEED Platinum Certification for the U.S. Dept. of Research's National Renewable Energy Laboratory in Golden Colorado.  Read more...

Earth Rangers Ecoloc Permeable Pavement Maintenance Video
This video documents the cleaning of an 8-year old Ecoloc permeable pavement at Earth Rangers in Toronto.  Unilock Ltd. supplied the pavers for this project. Learn more...

Genzyme Choses Eco-Priora for 2nd Facility
Genzyme used over 7000 sq ft of Eco-Priora to help achieve a LEED accreditation. This is the second Genzyme facility to use UNI Pavers by Unilock New England. Learn more...

Effectiveness of Green Stormwater Solutions
This presentation was made at the New England Water Environmental Association's Stormwater Specialty Seminar by Larry Murphy, P.E. of CHM Smith. Eco-Stone Pavers supplied by Ideal Concrete Block that were installed at the City Hall in Hartford, Connecticut's were part of this study on how green stormwater solutions used at the site were performing. Read more and
download this presentation.

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