Business Network Maryland
Companies:13,132 (+8)
Products and Services:527
Articles and publications:112
Tenders & Vacancies:1

Tri State Stone Co

Tri-State Stone & Building Supply, Quarriers of Carderock® Stone. Serving the Washington DC Metro Area for over four decades.
Address8200 Seven Locks Rd Bethesda, MD 20813-
Phone(301) 365-2100
"Quarriers of Carderock Stone"

color, texture, streaking,
spotting, clefting, etc. varies.

Aggregates can be purchased in bulk by weight.
Fill up your truck bed, pick up 1.5 ton Super Saks, shovel 100 LB aggregate bags, or ask us to deliver these materials for you..
Aggregates cover 100 Sq. Ft. 2 " thick per ton.

2" Blue Gravel * 3/4" Blue Gravel
CR6 * Stone Dust * Concrete Sand * Masonry Sand * Pea Gravel * 1" Tan Gravel * 2" Tan Gravel Aggregate Pictures
Also See Decorative Landscaping Stones

*$95 for the first two pallets
*$20 for each additional pallet
Limited delivery area.

Bulk deliveries include
aggregates, decorative stone and Carderock bulk veneer

You will always find building materials in stock at Tri-State. We carry:
*Block*Rebar*Portland Cement*Brixment*Sakrete Concrete*Sakrete Mortar & Sand Mix*Angle Irons*Rebar
*Metal Lath*Wire Mesh* Galvanized Truss*

Detergents, Sealers, Admixtures
We stock a wide variety of Detergents, Sealers and Admixtures. We carry detergents from Diedrich Technologies foundation coatings and concrete and masonry sealers by Thoro and Seaboard as well as concrete admixtures such as Sakrete accelerants

Carderock Carderock can be purchased in bulk or on pallets. Options include:
* Premium Snapped Veneer

* Special Sawn (Ashlar Patter)
* Sawn back Thin Veneer and Corners

Pictures of Carderock Dealers who Stock Carderock
View our brochure

Flagstone SQ's and REC's
We carry random squares and rectangles. This product is sold by the SQ. FT.
SQ and REC Flagstone

Coping, Treads, Sills, Hearths, Caps & Steps

Building Stone/Veneer
In addition to Carderock we also stock many options for building stone and veneers. This stone is delivered to our yard from all across the country. There are hundreds and hundreds of pallets and bulk material to choose from. Veneer is generally used for homes, large walls, entrance ways & piers. See some examples of building stones and veneers

In addition to Carderock we also have several options in stock. Wallstones can be dry stacked or set with mortar. One pallet of wallstone will yield approximately 30 SQ FT of wall. Wallstone is most commonly used for retaining walls and garden walls. Check out our Wallstone page

Tri-State Stone & Building Supply, INC and Ben Porto & Son, LTD., has been family owned and operated since 1926. The quarries flagship product is 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.

Links to Other Helpful Sites
Quarry Pictures See us on ARCAT.COM Submit Your Project Photos Here
Customers Photo Page
Building Materials Specifications

Be sure to check back periodically
for updates and future events!

We stock a wide variety of irregular flagstone and flagging. This material can be purchased by the ton on pallets. Check out the irregular flagstone page for pictures. Coverage for irregular flagstone is approximately 100 SQ FT per ton.

Tools & Supplies
In our store you will find all of the tools and accessories you need to complete your project. We have a wide variety of:

*Slickers*Jointers*Gloves*Line*Tie Wire
Nails*Safety Products*

Thin Veneer is a lightweight alternative to Full Veneer while still maintaining the natural stone look. We stock a wide variety of Thin Veneers in various styles, sizes and color combinations. Have a look at some examples of Thin Veneers.

For applications that require a stone larger than our irregular flagstone, steppers are an option. We carry various steppers.

Hours of Operations
Monday - Friday 7:30AM to 4:00PM
Saturday 7:30 to 11:30AM

Tri-State makes every effort to keep a wide variety of specialty products imported from all over the world In Stock We can also accommodate Special Orders as well as Direct Shipments for large projects.

Special orders for Indiana Limestone and Pennsylvania Thermal Treads include:
*Custom sizes for treads

**Please contact Brian Porto for more information on these products and for competitive quotes for special orders and direct shipments.***

As Seen in Stone World Magazine

Tri-State Stone and Building Supply has provided the finest Quality Carderock Stone and specialty products for many commercial applications.

We sell Hanover and Nicolock concrete paver products. What we do not have in stock can be ordered and in most cases picked up or delivered on the next business day.

Decorative Landscape Stones
We carry a wide variety of landscape materials and decorative landscaping stones. Including:
*Bulk Mulch*Leafgro*Topsoil* Fill Dirt
*Typar Landscaping Fabric*
Decorative Stones such as *Mexican Beach Pebbles* Delaware River Stone*Wakefield Chips*Red Chip*


Related items:

MidSouth Building Supply has been a leading distributor of windows, siding, and cabinetry since 1966.
  • Baltimore, MD 21244
  • (410) 944-8484
  • Serving The Tri-State Area Smithsburg
  • (301) 824-6613
Improve the health of your grass with lawn fertilization from our lawn care service in Hagerstown, Maryland.
  • Serving The Tri State Area
  • (301) 992-6048
Tri-State Concrete Coatings, Inc. specializes in decorative concrete resurfacing and repair work.
  • 6239 Broad Run Rd Jefferson, MD 21755-9108
  • (301) 371-8400
Tri County Builders of Southern Maryland 301-884-2121 We build the ideal home you will love for a lifetime!
  • Route 5 Charlotte Hall, MD 20622-
  • (301) 884-2121