Replace concrete with gravel.

While the finish looks simple, the durability of a gravel surface relies entirely on the preparation beneath. Removing old concrete and installing a professional-grade sub-base ensures your new driveway won't sink, shift, or become a muddy mess after the first British winter.

What Does the Work Involve?

• Site Survey: Checking for underground services (water, gas, electric) and assessing drainage requirements.
• Concrete Breaking: Using heavy-duty pneumatic breakers or hydraulic excavators to crack the existing slab.
• Waste Removal: Clearing the broken concrete and old sub-base, typically using a grab lorry or multiple skips.
• Ground Preparation: Excavating the soil to the required depth and levelling the area.
• Membrane Installation: Laying a heavy-duty geotextile weed membrane to prevent soil mixing with the stone.
• Sub-base Construction: Spreading and compacting MOT Type 1 crushed stone to create a solid foundation.
• Edging: Installing timber, brick, or metal edging to keep the gravel contained and prevent "migration."
• Gravel Laying: Spreading the chosen decorative aggregate to a consistent depth (usually 40-50mm).

Typical Costs

The primary cost drivers are the thickness of the original concrete and site access. If a grab lorry cannot reach the pile, you may need multiple skips, which often costs 30-50% more due to permit fees and lower capacity.

How Long Does It Take?

• Small Patio (up to 15m²): 1–2 days.
• Standard Single Driveway (25-30m²): 2–3 days.
• Large Double Driveway (50m²+): 4–6 days.
• Reinforced Concrete: Add 1 day for cutting through steel mesh if present.

DIY or Professional?

While you can hire a breaker and a skip, concrete removal is back-breaking work that generates tonnes of heavy waste. One cubic metre of concrete weighs roughly 2.4 tonnes; a standard driveway can easily produce 15 tonnes of debris.

Professionals use hydraulic machinery that completes in hours what would take a DIYer days. Furthermore, ensuring the sub-base is correctly compacted requires a heavy vibrating plate (wacker plate) and an expert eye to ensure water runs away from your house foundations.

Note: If you are changing the "footprint" of your driveway or adding a new drop kerb, you must contact your local council regarding Highways licences and planning permission.

Choosing the Right Tradesperson

• Waste Carrier Licence: Ensure they are registered with the Environment Agency to dispose of your concrete legally.
• Insurance: Look for at least £2 million in Public Liability insurance.
• Equipment: Ask if they own their plant (diggers/breakers) or hire it in, as this affects project timelines.

Questions to ask:

• How deep will the MOT Type 1 sub-base be? (It should be at least 100mm for vehicles).
• Will you be using a "grab" or skips for the waste?
• What type of weed membrane do you use? (Ensure it is permeable geotextile, not thin plastic).
• Can I see examples of gravel "stabilisation" grids if the driveway is on a slope?

UK Regulations

• SUDS (Sustainable Drainage Systems): Since 2008, UK law requires new driveways over 5m² to be permeable. Gravel naturally meets this standard without needing planning permission.
• Waste Disposal: "Fly-tipping" carries heavy fines; always ask for a waste transfer note if you have any doubts about where your old concrete is going.
• Part M (Access): Ensure the transition from the pavement to your drive remains level and safe for wheelchairs or prams.

Common Problems

• Sinking/Rutting: This happens when the sub-base is too thin or not compacted properly. Never lay gravel directly onto soil.
• Gravel Migration: Without proper edging or stabilisation grids, gravel will end up in the street or on your lawn.
• Weed Growth: Cheap membranes tear easily. Always use a high-quality, non-woven fabric to prevent weeds from rooting in the sub-grade.
• Incorrect Gravel Size: 10mm "pea shingle" often gets stuck in car tyre treads. 20mm angular stone is the industry standard for driveways as it "locks" together better.

Frequently Asked Questions