Below are links to organizations and dealers Interstate Design Landscaping is certified to work with.  Our association with these establishments helps us to provide you with the best possible materials and service.  Interlocking Concrete Pavement Institute ~ http://www.icpi.org The Interlocking Concrete Pavement Institute (ICPI), founded in 1993 is the North American trade association representing the interlocking concrete paving industry.  ICPI is considered by peer associations around the world as the leader in development and dissemenation of technical information for design professionals and contractors.  Our leadership position is due to years of commitment and energy from more than 1,100 members.  ICPI engages in a broad range of technical, marketing, educational, government relations and communications activities. Membership consists of interlocking paver manufacturers, design professionals, paver installation contractors and suppliers of products and services related to the industry.  ICPI offers a variety of services to its members through its vast library of technical publications, online design idea galleries, publications, paver installer certification programs and the industry's only dedicated magazine, Interlocking Concrete Pavement Magazine.  Click here to get a brief history of Segmental Concrete Paving. Techo-Bloc ~ http://www.techo-bloc.com North America's premier manufacturer of landscape and masonry paving stones designed to blend seamlessly with the natural environment. A world leader in product innovation, Techo-Bloc offers pavers, edges, carved images, masonry veneer, paving slabs, and walls designed to give homeowners and professionals the ultimate in design flexibility. From driveways, poolsides and patios to steps and planters and walkways, there's a Techo-Bloc "precious stone" to suit your design. Belgard ~ http://www.belgard.biz Belgard concrete pavers and retaining walls will enhance the aesthetics and value of your property. With a wide selection of colors, shapes and finishes, these products enhance any architectural style from Craftsman to Contemporary and Mission to Mediterranean. Belgard sets the standard for landscape design ideas and innovation. See for yourself.  National Concrete and Masonry Association ~ http://www.ncma.org The National Concrete Masonry Association (NCMA), established in 1918, is the national trade association representing the concrete masonry industry. The Association is involved in a broad range of technical, research, marketing, government relations and communications activities. NCMA is an association of producers of concrete masonry products, and suppliers of products and services related to the industry. NCMA offers a variety of technical services and design aids through publications, computer programs, slide presentations and technical training. Pennsy Supply ~  http://www.buildingmaterialsatpennsy.com The Pennsy Supply's Building Materials Store of Pennsy Supply, Inc. is South Central Pennsylvania's leading supplier of Belgard Hardscapes, Landscaping Supplies and Building Materials. Actively involved in the Belgard ION Program, we offer growth opportunity to contractors through our Authorized Installer Program. This certification increases leads, advertising, trade show exposure and pricing advantages. Conveniently located in Harrisburg off I-83, the Building Materials Store services residential and commercial projects, homeowners and contractors alike.