Boulders and outcroppings are used for large retention wall projects, to simulate a quarry wall or face, as well as accent stone in yards. Boulders can be engraved with names and addresses.
Boulders are upright stones which can be round or angular. They do not have parallel sides. Boulders are granite or limestone chunks approximately 2` thick, 2` wide and 2` long or larger. They are generally used as accent stone in yards, sometimes carved with names and addresses.
Cobbles are round, football size, sometimes flat boulders. They can be naturally shaped or tumbled to simulate weathering. Cobbles average 5” - 10” or 10” - 15”. Sometimes cobbles are referred to as small boulders, fieldstones or creek rock.
Outcroppings are slabs of sandstone or limestone used to create a more rustic appearance and retain more earth. They are generally 6” to 12” thick and are about 3` by 4` in size. Other sizes may be special ordered. All boulders and outcroppings must be set with a skidloader or forklift.
Slabs are quarried stones which are graded by size and typically have parallel flat sides. Boulders and slabs average 165 lbs per cubic feet.
Coverage:
Average Weight for Boulders:
- 12” equals 100 - 150 pounds
- 24” equals 500 - 1,000 pounds
- 36” equals 2,000 - 3,000 pounds
- 48” equals 4,000 - 6,000 pounds
Average Weight for Slabs:
- 6” thick / 3`-0”x3`-0” equals 750 pounds
- 8” thick / 3`-0”x3`-0” equals 1,000 pounds
- 10” thick / 3`-0”x3`-0” equals 1,250 pounds
- 12” thick / 3`-0”x3`-0” equals 1,500 pounds
Average Weight for Steps:
- 7” x 18” x 3`-0” equals 450 pounds
- 7” x 18” x 4`-0” equals 600 pounds
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Please visit the downloads page for a full list of Boulders, Outcroppings, Slabs & Cobbles specification documents.
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