Two systems
Separate resin-bound from resin-bonded
Resin-bound surfacing mixes aggregate and resin before it is trowelled onto a prepared base. Resin-bonded surfacing scatters aggregate onto a resin coat, producing a rougher finish. They are not interchangeable and behave differently for drainage, grip, repair and appearance.
A useful quote names the system and exact product proposed. It should also explain how edges, ramps, covers and the junction with the highway will be detailed.
- Bound or bonded system
- Named aggregate and resin
- Intended drainage behaviour
- Edges, covers and thresholds
Below the finish
Assess the substrate before pricing an overlay
A resin finish may be proposed over a new base or a suitable existing surface, but cracking, movement, contamination, trapped moisture or an unknown construction history can affect the result.
If an overlay is proposed, ask how the existing surface, falls and loading have been assessed and what preparation or repair is included. Covering a failing base can reproduce the same defects.
- Existing surface and known age
- Cracks, settlement and ponding
- Preparation and repair allowance
- New base design where required
Surface water
Confirm the complete drainage design
A resin-bound finish is only one part of a potentially permeable construction. The base, sub-base, formation and outlet still determine where water can go. A permeable-looking finish over an impermeable base needs a deliberate drainage route.
For domestic front gardens in England, national rules distinguish permeable surfacing or drainage to a permeable area within the property from impermeable work. Check the complete proposal and address before relying on permitted development.
- Where water leaves the surface
- Whether the complete build-up is permeable
- Channels, permeable areas or other outlets
- Thresholds and surrounding levels
Quote comparison
Make preparation and exclusions visible
Compare proposals against the same measured area and written scope: removal, preparation, disposal, base construction or overlay conditions, edge restraint, cover adjustments, surfacing and making good.
Ask about suitable weather and curing conditions, when the driveway may be used again, product documentation, and who is responsible for installation requirements and any written guarantee.
- Measured area and named system
- Base and preparation assumptions
- Curing and access restrictions
- Exclusions and guarantee responsibility
