When planning a resin driveway, most people focus on the finish—but the real performance comes from what sits underneath. The resin driveway sub-base is what determines whether your driveway stays smooth, stable, and long-lasting.
If the base isn’t right, the surface won’t last—no matter how good the resin is.
In professional installations, this base is typically built using a compacted aggregate layer (commonly known as MOT Type 1), often combined with a tarmac or concrete layer depending on the project.
For properties across London—where drainage, ground movement, and space all matter—choosing the right base is essential. This guide explains the differences between MOT Type 1, concrete, and tarmac, and which option works best in practice.
If you’re unsure what’s currently beneath your driveway, we can assess it and give clear, honest advice before any work begins. Call us on 08082813338 or email at [email protected].
Why the Resin Driveway Sub Base Matters
A resin surface is designed to be durable—but it relies entirely on the structure underneath it.
A properly installed sub-base:
- Supports the weight of vehicles without movement
- Prevents cracks from forming in the surface
- Allows water to drain through effectively
- Keeps the finish smooth and even over time
If the base is poorly installed or unsuitable, you may see:
- Cracks reflecting through the resin
- Uneven or sinking areas
- Water pooling instead of draining
In most cases, these issues are caused by the base, not the resin itself.
Overview of Sub-Base Options
MOT Type 1 (Compacted Aggregate Base)
MOT Type 1 is a crushed stone aggregate used as the primary foundation layer in driveway construction.
Technical role:
- Compacted in layers to create a stable base
- Provides load-bearing strength
- Allows water to drain through (permeable structure)
Important to know:
- It is not a finished surface for resin
- It must be combined with a top layer, such as tarmac
Think of MOT Type 1 as the structural foundation of the driveway system.
Concrete Base
Concrete is a rigid, non-permeable base often found in older driveways.
Technical characteristics:
- High compressive strength
- Fixed, non-flexible structure
Where it works:
- Can support resin if structurally sound
- Suitable for heavy loads
Limitations:
- Cracks over time due to ground movement
- No flexibility → cracks can transfer to resin
- Poor drainage compared to permeable systems
Concrete is only suitable if it is completely stable and free from defects.
Tarmac (Asphalt) Base
Tarmac is widely used in modern resin driveway installations.
Technical advantages:
- Slight flexibility allows it to absorb movement
- Provides a smooth, even surface for resin application
- Works effectively over a compacted MOT Type 1 base
Drainage note:
- Not fully permeable on its own, but works as part of a system designed for water management
- In most professional installations, tarmac is the preferred surface layer beneath resin.
MOT Type 1 vs Concrete vs Tarmac: Key Differences
Strength
- Concrete: Very strong but rigid
- Tarmac: Strong with added flexibility
- MOT Type 1: Strong as a compacted base layer
Flexibility
- Tarmac: Best for handling ground movement
- Concrete: Rigid and prone to cracking over time
- MOT Type 1: Depends on compaction and layering
Drainage
- MOT Type 1: Permeable and supports water flow
- Tarmac: Depends on system design and installation
- Concrete: Non-permeable
Suitability for Resin
- Tarmac: Ideal in most installations
- Concrete: Suitable only if structurally sound
- MOT Type 1: Not suitable on its own
Which Sub-Base Is Best for Your Property?
For New Installations
The most reliable system is:
- A compacted MOT Type 1 sub-base
- Finished with a tarmac layer
This provides:
- Structural strength
- Flexibility to prevent cracking
- Effective long-term performance
For Existing Driveways
You may be able to install resin over an existing surface if:
- It is stable and level
- There are no cracks or signs of movement
- Drainage is sufficient
If these conditions aren’t met, replacing the base is usually the better long-term decision.
We can assess your current driveway and advise whether it’s suitable or needs upgrading.
For London Conditions
London driveways face specific challenges:
- Frequent rainfall
- Ground movement
- Limited drainage space
A properly constructed system—using MOT Type 1 and a suitable surface layer—helps manage these conditions effectively.
Common Mistakes to Avoid
From experience, most issues come down to poor groundwork.
Avoid:
- Installing resin directly onto unstable ground
- Skipping proper compaction of MOT Type 1
- Using cracked concrete as a base
- Ignoring drainage requirements
- Choosing a cheaper setup instead of the correct one
These shortcuts often lead to early failure and costly repairs.
How Resin Bound London Ensures a Strong Foundation
At Resin Bound London, the focus is on doing the groundwork properly—because that’s what determines long-term results.
- Site Assessment
We check the existing base, ground conditions, and drainage.
- Ground Preparation
- Removal of unsuitable materials
- Installation and compaction of MOT Type 1
- Accurate levelling
- Base Installation
- Typically, a tarmac layer for strength and flexibility
- Installed to correct depth and specification
- Resin Application
- UV-stable resin and high-quality aggregates
- Mixed and applied for a consistent finish
- Curing and Completion
Walkable within hours
Ready for vehicles within 48–72 hours
All installations are carried out with long-term durability in mind and are backed by a 10-year guarantee.
Speak to our team for expert advice tailored to your driveway.
Conclusion
Choosing the right resin driveway sub-base is one of the most important parts of any installation.
While MOT Type 1, concrete, and tarmac all have their uses, the most effective approach in most cases is:
MOT Type 1 as the foundation, with a tarmac layer above. This combination provides the strength, flexibility, and performance needed for a long-lasting resin driveway—especially in London conditions.
If you want your driveway to last, the key is to get the foundation right from the start. Get in touch today for a no-obligation quote or site assessment.
