Improve water flow and prevent buildup with 40mm Drainage Rock, a clean, angular aggregate designed for high-performance drainage applications. This material allows water to move freely through the rock, making it ideal for both residential and commercial landscaping and construction projects across Calgary.
Why Choose 40mm Drainage Rock?
- Excellent drainage – Large gaps between stones allow for maximum water flow
- Clean, washed material – Reduced fines for better performance
- Angular rock – Helps lock together while still allowing drainage
- Prevents water buildup – Ideal for managing runoff and subsurface water
- Durable – Long-lasting material that will not break down over time
Common Uses
- Weeping tile and foundation drainage systems
- French drains and trench drainage
- Backfill behind retaining walls
- Drainage layers under patios and hardscapes
- Utility trenches and water management zones
- General drainage applications
Product Details
- Size: 40mm drainage rock
- Material: Clean crushed rock
- Color: Natural grey tones
- Shape: Angular
- Performance: Designed for maximum drainage and water flow
- Coverage: Approx. 100 sq ft per cubic yard at 3" depth
- Delivery Method: Loose bulk by dump truck
Material Calculator
Enter your project dimensions below to estimate how much 40mm Drainage Rock you need.
Delivery Information
- Standard tandem delivery (1–10 yards): $120 within the City of Calgary
- Additional charges will apply for surrounding areas outside Calgary
- Same-day / next-day delivery may be available, but we recommend ordering 1–3 business days in advance
- Maximum 1 product type per tandem load
This product will be delivered loose by dump truck and dumped as per your instructions. Please visit our delivery page for delivery information and instructions prior to placing your order.
The driver will call when on route.
Ordering Instructions
- Please place each bulk order separately if you need different delivery days
- Sod and bulk deliveries can be staggered when ordered separately at checkout
- Placement and dump instructions can be coordinated during checkout
- Recommended lead time is 1–3 business days
Need Help Ordering?
Call 587-330-4200 for product availability, delivery pricing, and help calculating your order.
Want to see it in person? Visit our 2,500 sq ft yard display today.