Resin Bound Surfaces · Cheltenham & the Cotswolds
UV-stable polyurethane resin trowel-applied over a structurally sound base, creating a single seamless, fully permeable surface with no joints, weeds or puddles. The finish is only as good as what's underneath - which is where most installs fail and where we don't.
Experienced installers of SureSet, RonaDeck and Daltex aggregates. UV-stable resin only - no aliphatic shortcuts.
Overview
Resin bound surfacing is a mix of clear UV-stable polyurethane resin and dried, kiln-dried aggregate (1–3mm typical), trowel-applied at 15–18mm thickness over a structurally competent base. Water passes straight through to the base below - making it the simplest way to meet SuDS compliance on a driveway without ground excavation drama.
Homeowners wanting a contemporary, joint-free surface that doesn't look like a 'driveway' - particularly suited to period properties where block paving would feel wrong, modern architecture wanting clean lines, and any project needing SuDS compliance without retrofitting drainage.
Resurfacing a structurally sound tarmac or concrete drive that has worn, overlaying a sound block-paved drive (with caveats), or as the finished surface on a new build over a properly-installed open-graded base.
Resin failures are almost always one of three things: wrong resin (aromatic browns in UV), wrong base (cracks telegraph through within months), or wrong installer (cold-day application, wet aggregate, or rushed mix ratios). Professional install means UV-stable aliphatic resin, verified base, controlled mix and weather-window discipline.
The cost of getting it wrong
Resin bound has a deserved reputation for premature failure when installed by general contractors without specific training. The product is unforgiving in three respects - base condition, weather window, and resin chemistry - and almost every rescue job we attend has failed on at least one of them.
Aromatic (cheaper) polyurethane resins yellow and chalk within 12–24 months in UK sunlight. Only aliphatic UV-stable resin should be used externally — the cost difference is small, the visual difference is total.
Resin is a 15–18mm overlay, not a structural layer. Any movement in the base (cracked concrete, failing tarmac, unsupported block paving) telegraphs through within one freeze-thaw cycle.
Wrong mix ratio (typically resin-starved), damp aggregate at mix time, or application below 5°C or above 25°C all cause incomplete cure. Stones lift, walk into the house, and bald patches appear.
The Millpond Process
Core-sample or visually verify the existing base. If unsound, full excavation and new open-graded macadam base is quoted - never overlaid blind.
Power-wash, fix defects, install perimeter edging or upstands, prime with SBR (over concrete) or appropriate primer for the substrate.
Aggregate and aliphatic UV-stable resin batched and mixed in a forced-action mixer for the manufacturer-specified time at correct ambient temperature.
Material laid at consistent 15–18mm depth, smoothed with trowels and spiked rollers to remove trowel marks. No joints, no breaks in the surface.
Foot traffic after 4–6 hours; vehicle traffic after 24–48 hours depending on resin and temperature. Care guide and 5-year workmanship guarantee at handover.
What you actually get
Water passes through the surface and base to ground - no planning permission required regardless of driveway size.
No joints, no patterns, no edges to weed or weather. A single continuous surface that flows around obstacles.
Hundreds of natural and recycled aggregates available - from Cotswold honey-stone to silver granite to recycled glass.
UV-stable aliphatic resin won't degrade in freeze-thaw, doesn't absorb hydrocarbons, and tolerates rock-salt de-icing.
Pressure-wash annually; re-sand or top-coat if required at year 8–10. No re-pointing, no re-sanding of joints (there aren't any).
Smooth surface with no joints means no trip hazards, no rattle, no stones in your shoes.
Materials, methods & variations
Resin bound is a finishing system, not a base system. Every aspect of long-term performance depends on three correct decisions - the base, the resin, and the install conditions. The notes below cover what we specify and why.
Only aliphatic polyurethane is UV-stable. Aromatic resins are cheaper, used in trade-warehouse 'budget' kits, and yellow visibly within 12–24 months. Every Millpond resin install uses aliphatic resin to BS 7533 and manufacturer-warranted formulations.
1–3mm gradations are standard for residential driveways. Larger aggregates (3–6mm) suit commercial and high-traffic areas. Aggregate must be kiln-dried to <0.5% moisture before mixing - wet aggregate is the leading cause of cure failure.
On a new install: 100–150mm MOT Type 3 (open-graded) sub-base topped with 50–70mm open-graded macadam. Over existing concrete: structurally sound with no live cracks, SBR-primed. Over existing tarmac: sound, no rutting, no oil contamination, primed appropriately.
Resin bound IS the surface; SuDS compliance comes from the open-graded macadam base allowing water through to a granular sub-base which infiltrates to ground or to a permeable area. We document compliance for your insurer and house-sale pack.
Manufacturer windows typically 5–25°C, no rain within 12 hours, surface dry. We plan installs around the weather forecast, not the calendar - and will reschedule rather than risk a rushed cure.
Aluminium edging strips, concrete upstands, brick soldier course or block paving border are all standard options. Without edge restraint, freeze-thaw lifts the perimeter first and progresses inward - every edge detail must be designed and installed before resin pour.
Questions answered
Still unsure? Call 07834 619294 and speak with the team direct - no call centre, no scripts.
Every driveway is priced individually based on size, ground conditions, drainage, surface choice and access. We quote a fixed price after a free on-site survey — no guesswork, no day rates. Always quoted after base assessment — never blind.
No - and the difference matters. Resin bound is a permeable, hand-trowelled 15–18mm system. Resin bonded is a 6mm scatter-coat over hot-applied resin, fully impermeable. Bonded does NOT meet SuDS and will not be recommended by us for new driveways over 5m².
Foot traffic 4–6 hours after install. Vehicle traffic 24–48 hours depending on resin product and ambient temperature. We will state the exact figures on your job sheet.
The resin itself won't crack. Cracks only appear if they propagate up from the base. That is why we won't install over a base that hasn't been verified - and we walk away from jobs where the client wants us to overlay a failing base regardless.
Aliphatic UV-stable resin (which is all we install) does not yellow. Aromatic resin (cheaper, found in budget kits) yellows visibly within 12–24 months. If a quote is unusually low, ask which resin chemistry - that's where the cost is being cut.
Often yes - provided the base is sound, no live cracks, no rutting, no contamination. We core-sample or test if unclear, and quote a new base if needed rather than overlay-and-hope.
No. The surface is fully closed at the top. Where weeds appear over time, it's almost always seed blown onto the surface - pressure-wash annually and they don't establish.
10–15 years on a correctly installed base with aliphatic resin. Many installs run longer; a top-up coat at year 10 extends life indefinitely.
No - the aggregate texture gives excellent grip. R-rating depends on aggregate selection; we specify R11+ aggregates as standard for residential driveways.
A preview of our work
On-site survey, accurate measurements, written specification, itemised pricing and a firm start date. No subcontracted estimators, no pressure, no surprise add-ons mid-build.
Free on-site survey, free written quote
