40mm Drain Rock in Bulk
40mm Drain Rock for Drainage and Erosion Control
(THIS IS AN UNWASHED PRODUCT) may contain fines, dust, and small particles
40mm Drain Rock (Unwashed), also known as fractured rock, is a reliable solution for managing water flow, improving drainage, and preventing erosion in residential and commercial landscaping projects. Its angular shape allows for better water movement while creating a strong, stable base.
Key Features:
• Material: Natural crushed fractured rock
• Size: Approximately 40mm (1.5 inches)
• Function: High-performance drainage rock for water control
• Structure: Angular edges for improved stability and flow
• Durability: Long-lasting and weather resistant
Common Applications:
• Drainage systems: Ideal for French drains, weeping tile, and trench backfill
• Foundations & driveways: Helps prevent water buildup and pooling
• Window wells & basements: Reduces moisture and improves drainage
• Erosion control: Stabilizes slopes, ditches, and high-flow areas
• Base material: Strong foundation for landscaping and construction projects
Important Considerations:
• Available in bulk, bulk bags, and 40lb bags
• Sold by the cubic yard for larger projects
• THIS IS AN UNWASHED PRODUCT – may contain fines, dust, and small particles
• Rinsing will enhance appearance if needed
• Commonly used for both residential and commercial drainage applications
Square Foot:
Cubic Yard:
Small Bags Required:
Thank you for shopping at TMH Industries! We understand that sometimes you may need to return an item. This policy outlines the conditions under which you can return your purchase for a refund.
Non-refundable Items:
• Bulk bags, bulk aggregate, artificial grass, sod, sandbags, glow aggregates, hardscape tools, and shipping costs are non-refundable.
Important Information Regarding Bulk & Perishable Products:
Final Sale: Due to the nature of bulk and perishable products, we are unable to offer refunds or exchanges on these items once they have been picked up or delivered, provided the product you receive matches your order. This includes (but is not limited to) all mulch, rock, sand & gravel, soil, firewood, decorative rock, boulders, and sod.
Delivery Inspections: For deliveries, please inspect the product before the driver unloads it. If for any reason you change your mind before the product is unloaded, you may order a replacement product for an additional delivery fee. If you refuse the product before it has been unloaded and do not want a replacement product, your delivery fee remains non-refundable.
Refundable Items:
• Unopened and unused retail products are eligible for a full refund within 14 days of purchase.
To be eligible for a refund, your items must be in their original packaging, unused, and with all tags and labels attached.
You must also present a valid receipt or proof of purchase.
Return Process:
• Bring your unwanted item(s) and receipt to the TMH Industries store.
• Speak with a customer service representative who will assist you with the return process.
• Refunds will be issued to the original form of payment used for the purchase.
Please Note: We reserve the right to deny any return that does not meet the above criteria.
Shipping calculated at cart
**Prices are subject to change without notice and seasonal rates may apply.**
Frequently Asked Questions
What is 40mm Drain Rock commonly used for?
40mm Drain Rock is well suited to weeping-tile zones, trench backfill, heavy-duty drainage, and dry creek beds.
What are the main benefits of 40mm Drain Rock?
40mm Drain Rock offers large clean stone that preserves void space for strong water flow. Drainage performance depends on the complete system, including slope, outlet, fabric, and pipe, not the rock alone.
How should 40mm Drain Rock be installed?
When installing 40mm Drain Rock, protect drainage pipe as specified, separate the rock from surrounding soil, and place it to the required depth.
How much 40mm Drain Rock should I order?
One cubic yard of 40mm Drain Rock covers approximately 108 square feet at a 3-inch depth. Measure the area's length and width, choose the required depth, and use TMH Industries' volume calculator to estimate your quantity. Allow for uneven grade, edging, and normal placement loss.
How is loose 40mm Drain Rock delivered in Calgary?
TMH Industries delivers 40mm Drain Rock loose throughout Calgary and select surrounding areas. The material is dumped in one accessible location approved by the driver. Keep the unloading area clear because final placement depends on safe access and site conditions.
