Standard gravel
Produced from naturally rounded granite river pebble, our natural washed gravels for roof ballast are designed to outperform
industry requirements and standards.
–Photos for illustrative purposes only–
Granulometry: 20-40 mm
In compliance with AMCQ norms
Graded in accordance with ASTM D 448 No. 4
CAN/CSA A23.2-9A MgS04 % measured 0.59 %
Gravel 40-20mm Group 2.
FOR BALLAST USE
| 3/4-1 1/2 (20-40mm) |    | 674 |
1 metric ton covers +/- 120p2 to 2 inches thick
STANDARD GREY LIMESTONE
no. BT-964
Granulometry: 5-10 mm
SRI OF 30 calculated in accordance with ASTM E1980
CAN/CSA A23.2-9A MgS04 % measured 6 %
FOR BUILD-UP ROOFS AND OTHERS
| 1/4-3/8 (5-10mm) | | 964 |
1 metric ton covers +/- 120p2 to 2 inches thick