Tri-State Stone and Building Supply Inc.

Tri-State Stone and Building Supply has been supplying Carderock® stone, building stone and building materials to the greater Washington DC Metropolitan area for over 90 years. Family owned and operated since its inception in 1926.

We carry an extensive inventory of hand selected building stone and building materials including flagstone, wallstone, decorative landscape stone, building stone, and veneers.

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We are the exclusive quarriers of Carderock® Stone.

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Tri-State Stone and Building Supply, Inc. | Carderock® Wall

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We are the exclusive quarriers of Carderock® Stone. This beautiful building stone is a mica-schist quartzite, with horizontal and vertical cleavage making it easy to work into numerous installation styles. The vibrant blues, browns, grays and greens create an aesthetically pleasing palette of colors for most any building stone project. The unique colors, durability and ease of use have made Carderock® Stone a favorite of architects, designers, stone masons and homeowners for generations.

Quarriers of Carderock® Stone

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We have bulk aggregates in stock.
We have plenty of 1" PA Blue Select Natural Cleft Flagstone in stock.
Rubber Boots, Raincoats, Brick Tongs, and Mason Chisels in stock. #MasonTools #instock
Replacement hammer handles in stock.  #masonrytools #instock
Need a tarp? We got 'em! #instock
Restocked Warwood Stone Hammers and Vaughan Brick Hammers. #masonrytools #buildwithstone