Small Lava Rock is an angular red rock sized between ¼”-¾”. Very lightweight and porous, this makes for a great addition to encourage drainage in soils. Commonly used as a minimal-upkeep topdressing/mulch in garden beds this rock deters weeds, though it will continue to break down to smaller pieces once under pressure and provides no nutritional benefit to surrounding plants and soil. Also due to its porous make-up it is commonly used in drains or around houses.
Calculations
For products under 7/8"
One Cubic Yard Covers:
324 Sq. Ft. ......... 1" deep
162 Sq. Ft. ......... 2" deep
108 Sq. Ft. ......... 3" deep
81 Sq. Ft. ........... 4" deep
65 Sq. Ft. ........... 5" deep
54 Sq. Ft. ........... 6" deep
Rock Wall Formula
L x H
Sq. ft. per ton
1/2 man = 16 9" to 12"
1 man = 14 12" to 18"
2 man = 12 18" to 28"
3 man = 9 28" to 36"
4 man = 7 36" to 48"
5 man = 5 48" to 54"
6 man = 3 54" to 60"