Driveway sub-base depth
The sub-base distributes load and prevents settlement. Depth depends on traffic (car vs HGV) and ground conditions. Typically 100–150 mm of type 1 for domestic; more for heavy vehicles. We build to the correct depth and compact in layers.
The commercial value of resolving driveway sub-base depth early is fewer delays, clearer budgeting, and reduced repeat disruption.
review Groundworks Contractors in Richmond and Excavation Contractors in Kingston.
When you might need this
Teams usually investigate driveway sub-base depth when early warning signs start affecting reliability, compliance, or project timelines. This is often the point where decision makers move from observation into scoped technical action.
Signs and common situations
The symptoms below are the most common triggers we see before diagnosis and repair planning.
- Cars only: typically 100–150 mm type 1
- Occasional HGV: 150–200 mm or more
- Soft ground: deeper sub-base
- Compaction in layers
- Membrane over subsoil often specified
What to expect from the work
We assess the ground and use. We specify and build the sub-base to the correct depth and compaction.
Think you might have driveway sub-base depth? A professional inspection will confirm the diagnosis.
How this gets resolved
We excavate, install membrane if needed, and place and compact sub-base in layers. We leave a level formation for surfacing.
Cost and complexity factors
Cost and complexity usually depend on access constraints, total scope, existing condition, and whether related works need to be coordinated in the same programme window.
What the process looks like
We keep delivery structured so scope, sequencing, and sign-off remain clear.
Step 1: Initial assessment
What this step delivers: Root cause and scope are confirmed.
Step 2: Method planning
What this step delivers: Practical repair strategy is agreed.
Step 3: Delivery and verification
What this step delivers: Work is completed and validated.
We provide these services across the UK, including
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Driveway sub-base depth FAQ
- What are the signs of driveway sub-base depth?
- Cars only: typically 100–150 mm type 1. Occasional HGV: 150–200 mm or more. Soft ground: deeper sub-base.
- How do you diagnose driveway sub-base depth?
- We assess the ground and use. We specify and build the sub-base to the correct depth and compaction....
- How do you fix driveway sub-base depth?
- We excavate, install membrane if needed, and place and compact sub-base in layers. We leave a level formation for surfacing....
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