Ledge Construction Products

The source of all of our ledge products is our quarry located in North Hartland, VT. The rock is dark blue-grey in color and is some of the hardest and most durable around.

Quick Facts: The geologic name for our rock is Amphibolite, although in the industry it is often referred to as Trap Rock. Amphibolite is a metamorphic rock that consists mainly of the mineral amphibole and varying other mineral assemblages. Amphibolite forms at temperatures of around 1,000 °F and pressures of 175,000 psi. Our particular rock is around 240 million years old and was formed during the Appalachian mountain building process. Amphibolite is commonly used in the construction industry because of its hardness and durability. It is harder than limestone and denser than granite. High quality amphibolite is sometimes quarried for building faces and countertops, often called ‘black granite’.

Not sure what type of material you should use?
See our quick reference guide for help. You can also call our main office at 603-298-8705 or email sales@blaktop.com.

Not sure how much material you’ll need?
See our material calculator for help.

Need it delivered? Call us at 603-298-8705 to schedule a delivery.

HQ Available at the Hartland Quarry
WL Available at the West Lebanon Sales Yard

Ledge Materials (Click an image for a larger view.)

Riprap20026 Riprap
Riprap is any stone greater than 1 foot in size. It is used primarily for slope stabilization but is sometimes used for decorative purposes in landscaping. Riprap requires heavy equipment to install and is more expensive to deliver. HQ

1 Foot Erosion Stone20025 1′ Erosion Stone
Primarily used for slope stabilization. Requires heavy equipment to install. HQ

7-Inch-Erosion-Stone20030 7″ Erosion Stone
Primarily used for slope stabilization and stone-lined ditches. Heavy equipment recommended for installation. HQ WL

3-Inch-Erosion-Stone20040 3″ Erosion Stone
Clean stone typically used for slope stabilization, stone-lined ditches, or as drainage stone. HQ WL

3-Inch-Dense-Grade20050 3″ Dense Grade
Mixture of stone, sand, and fines that packs well. Commonly used for road sub-base. HQ WL

VT-NH 3 Inch Subbase20051 VT/NH 3″ Subbase
Meets NHDOT 304.5 and VAOT 704.06A specifications. Doesn’t pack as well as 3″ Dense Grade. Not recommended unless specified by an engineer.
HQ WL

1.5-Inch-Ledge-Stone20061 1 1/2″ Ledge Stone
Clean stone that is typically used as drainage stone and for drip edges around buildings. HQ WL

1.5-Inch-Twin-Pack20070 1 1/2″ Twin Pack
Mixture of stone, sand, and fines that packs well. Typically used for road subbase. HQ WL

VT-NH 1.5 Inch Subbase20071 VT/NH 1 1/2″ Subbase
Meets NHDOT 304.3, NHDOT 304.4, and VAOT 704.05A specifications. Doesn’t pack as well as 1 1/2″ Twin Pack. Not recommended unless specified by an engineer. HQ WL

0.75 Inch Ledge Stone20081 3/4″ Ledge Stone
Clean stone that is commonly used as drainage stone, for landscaping, and for stone walkways. HQ WL

0.75-Inch-Concrete-Ledge-Stone20082 3/4″ Concrete Stone
Clean, washed stone that meets NHDOT Stone #67, VAOT 704.02B, and AASHTO M43-82 specifications. Primarily used as drainage stone and to make concrete.

0.75-Inch-Twin-Pack20090 3/4″ Twin Pack
Mixture of stone, sand, and fines that forms a hard, erosion-resistant surface when compacted. Very popular for use in gravel roads, driveways, and walkways. Sometimes referred to in the industry as ledge pack or hard pack. HQ WL

VT-NH 0.75 Inch Shoulder Gravel20091 VT/NH 3/4″ Shoulder Gravel
Meets NHDOT 304.33 and VAOT 704.12A specifications. Doesn’t pack nearly as well as 3/4″ Twin Pack. Not recommended unless specified by an engineer. HQ WL

0.5-Inch-Ledge-Stone20101 1/2″ Ledge Stone
Clean stone that is commonly used as drainage stone, for landscaping, and for stone walkways. HQ WL

0.375-Inch-Ledge-Stone20110 3/8″ Ledge Stone
Clean stone that is commonly used as drainage stone, for landscaping, and for stone walkways. HQ WL

0.375-Inch-Twin-Pack20111 3/8″ Twin Pack
Mixture of stone, sand, and fines that packs very well. Commonly used for walkways and driveways.
HQ WL

Manufactured-Sand20120 Manufactured Sand
Commonly used as a bedding material for laying pavers and flagstone or as winter sand. Performs better than screened sand when used for winter sand. Sometimes called stone dust or traction sand in the industry. HQ WL

Jock-Sand20130 Jock Sand
Blend of manufactured sand and silty fill. Typically used for horse arenas and baseball and softball infields. Preferred by local patio installers as a bedding material for laying pavers and flagstone.
HQ WL

Silty-Fill20140? Silty Fill
Very fine stone dust that is considered a by-product of the crushing process. Typically used as an inexpensive fill material. Used by some as a natural mineral supplement for gardens. HQ WL

Material is subject to availability.
We try our best to keep our stockpiles full, but sometimes demand outpaces our production of a product. Please call ahead.