Resin Bonded vs Resin Bound: Key Differences, SUDS Compliance, Appearance and Longevity

Quick Answer: Resin bound paving mixes aggregate with resin and trowels it to a monolithic permeable layer — SUDS-compliant, no planning permission needed for front driveways over 5m². Resin bonded paving applies resin to a sealed base and scatters aggregate on top — the surface looks similar but is NOT permeable, IS impermeable, and DOES require planning permission for front driveways over 5m². They look almost identical until the surface ages. Resin bound lasts 15–25 years; resin bonded 5–10 years.

Summary

Resin bonded and resin bound paving are often confused by customers and occasionally by contractors. Both produce an attractive aggregate-finish surface at lower cost than full natural stone. Both look broadly similar when new. But they are fundamentally different products with completely different performance characteristics, durability, and planning implications.

The confusion is commercially significant: a customer who requests "resin paving" assuming it is permeable (and therefore doesn't need planning permission for their front driveway) may be receiving a resin bonded product that is impermeable. If they haven't obtained planning permission for their front garden driveway, they could be in breach — and the contractor who laid it could face a claim.

Understanding the structural difference — and being able to explain it clearly to customers at the quoting stage — is an important part of professional practice for any contractor working with decorative paving.

Key Facts

Quick Reference Table

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Feature Resin Bound Resin Bonded
Permeable? Yes No
Planning permission (front driveway >5m²)? Not required Required
How aggregate is fixed Fully coated in resin, trowelled as composite Surface-scattered onto resin-coated base
Base required Porous asphalt or open-graded system Any stable sealed surface
Typical depth 15–25mm 3–6mm
Aggregate void content ~15–25% 0%
Longevity (vehicle driveway) 15–25 years 5–10 years
Chip loss risk Very low (aggregate fully bonded) Moderate to high (surface bond only)
Cost Higher Lower
Skid resistance Good (aggregate texture throughout depth) Good when new; reduces as chips detach

Detailed Guidance

How They Are Installed

Resin Bound Installation:

  1. Prepare a permeable base (porous asphalt or open-graded sub-base in cellular containment)
  2. Apply a primer to the base
  3. Mix kiln-dried aggregate with two-part polyurethane resin in a forced-action mixer for 30–60 seconds
  4. Trowel the mixed material to 15–25mm depth
  5. The result is a monolithic layer where all aggregate surfaces are coated in resin and bonded to each other; water passes through the interstitial voids

Resin Bonded Installation:

  1. Prepare or use an existing sealed base (dense tarmac, concrete — does not need to be permeable)
  2. Apply a single-component or two-part adhesive resin coat to the base surface
  3. While the resin is tacky, broadcast dry aggregate onto the surface and press it in with a roller
  4. Allow to cure; sweep off loose/excess aggregate
  5. The result is a decorative aggregate surface coating; the resin-sealed base has no permeability

The resin bonded process is much faster and simpler — it is effectively a decorative coating, not a structural material layer.

Identifying Which Product You Are Receiving

If you are specifying paving for a customer, or if a customer suspects they received the wrong product, here is how to distinguish them:

Visual check (surface):

Water test:

Edge check:

SuDS Compliance and Planning

Resin bound — Permeable surface; satisfies SuDS requirements under GPDO 2008 Schedule 2 Part 1 Class F; no planning permission required for front driveway installation of any area.

Resin bonded — Impermeable surface; subject to the same planning rules as tarmac or concrete. For a front driveway over 5m² in England, planning permission is required. Some customers (and contractors) are unaware of this distinction and lay resin bonded without planning permission — a breach of the GPDO conditions. This is technically an enforcement matter and could require removal.

If a customer asks for "resin paving" for their front driveway and assumes it doesn't need planning permission, always confirm which product you are proposing and its SuDS status before proceeding.

Aggregate Detachment and Chip Loss

The Achilles heel of resin bonded paving is chip loss. Because only the bottom face of each aggregate piece is bonded to the resin film, the bond is vulnerable to:

Once chips begin detaching, the surface appearance deteriorates and loose aggregate scatters onto adjacent surfaces. Re-treatment (re-coating the surface with resin and re-scattering aggregate) extends life but the underlying degradation continues. Most resin bonded driveways need significant attention by 8–10 years.

Resin bound paving does not suffer the same mechanism — the aggregate is fully encapsulated and bonded on all sides.

Appropriate Uses for Each

Resin bound is appropriate for:

Resin bonded is appropriate for:

Pricing

Resin bonded is consistently cheaper to install (typically 20–35% less than resin bound for the same area) because:

Over the lifetime of the installation, resin bound is more economical due to its significantly longer lifespan.

Frequently Asked Questions

My resin driveway is losing chips — is it resin bound or bonded?

Progressive chip loss is characteristic of resin bonded, not resin bound. Resin bound aggregate is fully encapsulated and should not detach (if it does, it indicates insufficient resin in the mix at installation, or a base adhesion failure). If chips are scattering, your surface is almost certainly resin bonded.

Can resin bonded be upgraded to resin bound?

Not directly — they are different construction systems. If a resin bonded surface has failed, the options are: (1) remove and reconstruct with resin bound on a new porous base; (2) re-coat with a fresh resin bonded layer (extends life 5 years, not a permanent solution).

Which looks better?

Both look attractive when new. Resin bound has a slightly fuller, rounder aggregate texture; resin bonded can look slightly flatter. After 5 years, resin bound still looks the same; resin bonded shows wear and chip loss. Long-term, resin bound maintains its appearance far better.

Is there a difference in colour range?

Both are available in similar aggregate colour ranges (buff, silver, slate, golden, charcoal, etc.). Colour choice is independent of whether the product is bound or bonded — it is determined by the aggregate type, not the installation method.

Regulations & Standards