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Base Check First

Tarmac to Resin Driveway Conversion in Huntingdon

A worn tarmac drive can become a clean, permeable resin surface, without digging up everything, if the base is sound.

  • Itemised Quote
  • Base Assessed First
  • No Surprise Dig-Outs
A modern grey bungalow with a new resin driveway, landscaped front garden, and detached garage on a sunny day.

What Goes Wrong

Why some resin overlays fail, and how to avoid it

The finish is only as good as what is underneath. These are the failure modes that a proper assessment catches before work starts.

Cracks Left Unpatched

Cracks wider than around 3 mm will reflect through a resin overlay within months, splitting the new surface along the same lines.

Crack Threshold Check

Every crack is measured and patched before priming, anything beyond the threshold triggers a targeted repair or a dig-out assessment.

Poor Drainage Fall

A resin surface laid over a flat or back-falling base will pool water at the same spots the old tarmac did, defeating the upgrade.

Fall Measured & Corrected

Drainage gradient is measured before the resin goes down; if the fall is inadequate, it is corrected at preparation stage, not after.

Clay Base Movement

Cambridgeshire’s clay-heavy ground swells and shrinks seasonally, and a tarmac base that has shifted will continue to move under a new surface.

Sub-Base Stability Test

Soft or spongy areas are identified during the survey; where base movement is confirmed, a full dig-out and compacted sub-base is specified.

Skipped Primer Coat

Resin bound aggregate laid directly onto unprepared tarmac loses adhesion over time, causing the surface to delaminate in patches.

Primer Applied to Spec

After pressure washing and patching, a primer coat is applied to the clean tarmac to bond the resin binder to the base correctly.

Scope of Work

What a tarmac-to-resin conversion covers

From the initial base check through to the finished resin bound surface, here is what the work involves.

Drainage Channel Installation

Channel drain fitted where fall correction alone is insufficient.

Aggregate Selection

Natural stone aggregate chosen to suit the property’s finish.

SuDS Compliance Check

Permeable surface verified against front-driveway planning rules.

Tarmac Base Check

Whether your tarmac drive can take a resin overlay depends on what is happening underneath

A tarmac surface that looks worn on top can still be a perfectly sound base for resin, but the assessment has to come first.

Request a Survey

Older tarmac driveways across Huntingdon’s established residential streets are a common starting point for resin conversion. The key question is whether the tarmac base is still structurally stable. Cracks wider than around 3 mm, soft or spongy areas, and standing water after rain all indicate base movement that a resin overlay will not bridge. Cambridgeshire’s clay-heavy ground can cause base shift over time, so the stability check is not a formality.

Where the tarmac passes inspection, preparation involves pressure washing to remove surface contamination, patching any cracks or depressions, and applying a primer coat to improve adhesion between the tarmac and the resin bound layer. Drainage fall is measured at this stage, the finished surface needs a minimum gradient to clear water to the boundary or a channel drain. If the existing fall is inadequate, it is corrected before the resin is applied.

The resin binder and aggregate are mixed and trowelled over the primed tarmac to a consistent depth. Edge restraints and joint lines are finished before the surface cures. A resin bound overlay on a sound tarmac base avoids the cost of full excavation and sub-base work. If the base is found to be unsuitable during the survey, a full dig-out is specified at that point, not discovered mid-job.

Why Choose Us

Why use us for your tarmac-to-resin conversion in Huntingdon?

We take your enquiry and schedule a survey that assesses the base honestly, with every stage quoted as a separate line.

Itemised Quotation by Stage

Excavation, sub-base, drainage and resin finish are quoted separately so you see exactly what each stage costs.

Survey Before Any Commitment

The survey assesses the base and drainage fall before a price is agreed, no obligation to proceed.

Dig-Out Confirmed at Survey

If the tarmac base needs lifting, that is established during the assessment, not after work has started.

Surveyed First, Written Quote

We take your enquiry and schedule a survey for this specific type of conversion.

No Hidden Scope Changes

Each stage is agreed and priced before it begins, so the final cost matches the itemised quote you received.

A completed resin driveways job at a house
A finished resin driveways project

How It Works

From first enquiry to finished resin surface

Request a Survey

  1. 01

    Describe Your Drive

    Tell us the area size, what is down there now, and whether water sits on the surface after rain.

  2. 02

    Book a Base Survey

    A site visit assesses stability, crack width, and drainage fall, then leads to an itemised quote.

  3. 03

    Conversion Carried Out

    Once each stage is agreed, the surface is prepared, primed, and the resin bound overlay is laid and cured.

Pricing Estimates

Typical Tarmac To Resin Driveway Conversion Prices

JobTypical cost
Small tarmac conversion£2,000-£3,500
Typical driveway conversion£3,500-£6,000
Larger tarmac to resin conversion£6,000-£9,000
These prices are estimates and often vary with the condition, size and scope of each job. Message or call us for a free, no-obligation quote.
See all prices

Common Questions

Questions about converting tarmac to resin in Huntingdon

  • Can my tarmac be left in place for a resin driveway, or does it need lifting first?

    It depends on the condition of the tarmac. If it is structurally sound, well-bonded, and drains correctly, resin can be laid directly over it. Where the tarmac has failed, lifted, or holds water, it needs lifting before the resin goes down. A site inspection confirms which applies.

  • How do I know if my old tarmac is sound enough for resin?

    Sound tarmac sits flat, shows no soft or spongy patches, and has no sections that flex underfoot. Cracks that run in a pattern, edges that have lifted, or areas where the surface crumbles under pressure all indicate the base has failed and will need attention before resin is applied.

  • What checking needs to be done before converting tarmac to resin?

    The tarmac is checked for structural integrity, surface adhesion, drainage falls, and any cracking or delamination. Drainage outlets and gully positions are assessed to confirm the finished resin surface will shed water correctly. Any failed sections are identified so remedial work can be scoped before laying begins.

  • What happens if there are cracks or loose bits in the tarmac?

    Loose or cracked tarmac cannot support a resin overlay reliably. Those sections are either cut out and repaired or lifted entirely, depending on how far the failure extends. Laying resin over unstable tarmac causes the new surface to crack or delaminate, so remediation is carried out first.

  • Will hidden damage under the old tarmac be found before the resin goes down?

    A thorough surface inspection catches most problems before work starts. Where tarmac is lifted, the sub-base beneath is checked for voids, soft spots, or failed compaction. Any issues found at that stage are addressed before the resin finish is applied, rather than covered over.

  • Do I need to replace the whole base if the tarmac has failed in places?

    Not necessarily. Localised failure can often be cut out and reinstated rather than requiring a full dig-out. If failure is widespread or the sub-base beneath is compromised, full excavation gives a more reliable long-term result. The extent of the work is confirmed on site before any price is agreed.

  • Can a resin layer go over tarmac without it just acting like a decorative top layer?

    Yes, when the tarmac base is sound. Resin bound aggregate bonds to a prepared tarmac surface and forms a structural wearing course, not a cosmetic coating. The tarmac acts as the rigid base layer, so the finished surface performs as a full driveway rather than a thin decorative skin.

  • Will water that already sits on my tarmac be sorted out during the conversion?

    Pooling water usually means the existing falls are wrong or drainage is blocked. Resin bound aggregate is permeable, so water drains through the surface itself, but the sub-base and drainage outlets still need to handle that water. Falls and drainage are assessed and corrected as part of the conversion where needed.

  • Which areas do you cover for Tarmac to Resin Driveway Conversion?

    We cover Tarmac to Resin Driveway Conversion in and around Huntingdon, including Godmanchester, St Ives, Brampton, Alconbury Weald, Sawtry, Ramsey, Buckden, Kimbolton and Hemingford Grey. If your area isn’t listed, send us a quick message to check.

Tell Us About Your Driveway

Describe the area, what is down there now, and how it drains. We’ll schedule a base assessment and quote every stage separately.

Request a Survey