As an approximate guide, one bulk bag will cover:

• 10–12m² at a depth of 50mm

• 6.5–7.5m² at a depth of 75mm

• 5–6m² at a depth of 100mm

Garden borders, rockeries, and footpaths commonly require around 40mm to 50mm of decorative chippings, while domestic driveways typically require approximately 50mm to 75mm depending on the ground conditions and sub-base.

These figures are estimates only. Actual coverage will vary according to the bag weight, ground conditions, compaction and the accuracy of the excavation.

Not sure how many bags you require? Call our Rugby team on 01788 866945 with the length, width and required depth.

90-40mm Tweed Cobbles decorative chippings are intended as a decorative surface, border, or driveway topping. Colour, natural subtle sparkled texture, and angular shape can vary according to the source of the stone.

Excavate the area to the required depth and prepare the ground appropriately. A suitable geotextile membrane may be required to prevent weed growth and stop the subgrade from mixing.

Spread evenly over the prepared sub-base to the recommended depth. Rake or lay by hand to ensure an even, flat distribution across the entire area.

Check the finished surface level and slope to ensure proper drainage away from surrounding structures. Ensure the depth is consistent to prevent exposed patches or uneven surface layers.

Requirements vary according to ground conditions, loading, and the intended use of the surface. Follow the project specification or seek professional advice where appropriate.

Available for collection from our Rugby branch or local delivery using our own fleet.

Bulk bags will normally be delivered by a crane-equipped lorry. Delivery is kerbside and the final offloading position is always subject to safe access and the driver’s discretion.

Please tell us before delivery about:

• Narrow roads or restricted entrances
• Parked vehicles or limited turning space
• Overhead cables, trees or other obstructions
• Soft, sloping or unsuitable ground
• Any other access concerns

Enter your postcode on the product page to check your delivery area. We’ll confirm the delivery date after your order is placed.

What colors are featured in Tweed Cobbles, and how does rain affect their appearance?

Tweed Cobbles feature a warm, natural blend of chestnut browns, soft tans, slate greys, and pale cream highlights. When dry, they display a soft, chalky matte finish with subtle variations. When wet, the colors darken dramatically, exposing rich, glossy earth tones that add vibrant texture to outdoor features.

What are the best landscaping uses for 40–90mm Tweed Cobbles?

Because of their larger, substantial size, 40–90mm cobbles are ideal for rockeries, dry riverbeds, pond surrounds, decorative borders, and heavy-duty ground cover. Their weight ensures they stay firmly in place, making them excellent for edging, retaining embankments, and framing larger garden structures.

Are 40–90mm Tweed Cobbles suitable for driveways or walkways?

Tweed Cobbles are not recommended for driveways or general walkways. Due to their large, rounded shape (up to 90mm), they create an uneven surface that is difficult to drive over and uncomfortable to walk across. For footpaths and driveways, smaller sizing such as 20mm angular chippings or 20–40mm pebbles provides a much smoother, more stable surface.

Are Tweed Cobbles fish-friendly for ponds and water features?

Yes, these natural stones are inert and completely safe for fish and aquatic life. They will not leach harmful minerals or alter the pH balance of pond water. It is always recommended to hose down the cobbles prior to placing them into an active fish pond to rinse off any natural dust accumulated during transit.

How do Tweed Cobbles help with weed suppression and soil health?

When installed over a durable landscape membrane, the heavy cobbles form an opaque barrier that blocks sunlight to stop weeds from taking root. Additionally, the thick layer of stone helps regulate soil temperature, shielding plant roots from harsh frost in the winter and locking in soil moisture during dry weather.