Can a Resin Driveway Be Laid Over Existing Tarmac or Concrete?
Updated: Oct 10
One of the biggest advantages of resin bound is that it can often be laid straight over your existing driveway. No dig-out means less mess, a faster job and a lower price. But it only works if what is underneath is right. Here is how we decide whether your tarmac or concrete can be overlaid, and what happens when it cannot.
The short answer
Resin bound can go over tarmac or concrete that is solid, not moving, free of major cracks and able to drain. It cannot go over block paving, cobble lock, gravel or slabs, because those surfaces move and the joints would crack the resin. Whether an overlay is possible is decided at the site visit, not over the phone.
Resin over tarmac
A tarmac driveway is a good candidate if it is firm underfoot, has no potholes or soft spots, has not broken up at the edges and does not have deep ruts in the wheel tracks. We clean it, repair any small defects, fix edge restraints so the resin has something firm to finish against, and then lay the resin. Freshly laid tarmac is normally left to cure before resin goes on top. Where tarmac has crumbled, sunk or broken away at the edges, it is taken up and a new base is laid first.
Resin over concrete
Old concrete driveways, especially the 1960s to 1980s ones common in South Dublin estates, are often ugly but structurally sound, which makes them ideal for an overlay. Hairline cracks are repaired. Expansion joints and larger cracks are treated so that movement does not reflect through the resin. Oil stains are cleaned and the surface is primed so the resin bonds properly. If sections have sunk, lifted or broken up, those sections are cut out and rebuilt.
What cannot be overlaid
Block paving and cobble lock: the individual blocks move, so they are lifted and replaced with a proper base.
Gravel: loose by nature, so it is removed and a bound base is laid.
Slabs and flags: the joints move and would crack through.
Badly cracked, sunken or rutted concrete or tarmac: the problem areas are dug out and rebuilt first.
Drainage when you overlay
Resin bound is permeable, but concrete and ordinary tarmac are not. When resin is laid over them, rainwater passes through the resin and then runs across the old surface underneath. That is fine as long as the existing driveway has falls towards a drain, gully or soft landscaping. If it does not, we add a channel drain or adjust levels. If you need a fully permeable SuDS driveway, for example on a new or enlarged hard surface, the base must be permeable too, which means a dig-out and a permeable sub-base. Our planning permission guide explains when that matters.
How much does an overlay save?
As a rough guide only, a resin bound overlay on a sound base in the current Dublin and Wicklow market typically costs €60 to €100 per square metre. A full dig-out and new compacted sub-base adds to that and takes two or three extra days. For a typical two-car driveway the saving from overlaying is often substantial. Our resin driveway cost guide breaks the price down.
How long an overlay takes
Most overlays on a sound base are finished in one to two days: preparation and edging on day one, laying on day one or two. You can usually walk on it after about 24 hours and drive on it after 48 to 72 hours.
Want to know if your driveway can be overlaid? Platinum Paving Dublin will inspect your base, tell you honestly whether it can take resin, and give you a written price. Call 087 440 3442 or request a free quote. We lay resin bound driveways across South Dublin and North Wicklow with our own crew and a 5-year guarantee.
FAQ
Can resin be laid over an existing tarmac driveway?
Yes, if the tarmac is solid, well bonded and free of major cracks, potholes or soft spots. It is cleaned, repaired where needed and edged, then the resin bound surface is laid on top. New tarmac is normally left to cure before resin goes on.
Can resin be laid over concrete?
Yes, if the concrete is structurally sound and not moving. Cracks are repaired, expansion joints are treated so they do not reflect through, and the concrete is primed before the resin is laid.
Can resin go over block paving or cobble lock?
No. Block paving moves under load and the joints would crack the resin. The blocks are lifted and a proper base is laid before resin goes down.
Is resin over concrete still permeable?
The resin layer lets water through, but concrete and standard tarmac underneath do not, so the driveway still needs falls and somewhere for water to drain. For a fully permeable SuDS driveway the base must be permeable too.
Related guides
More from Platinum Paving Dublin on resin driveways, costs and surface options:
What You Need to Know About Resin Bound Driveways — benefits, how they are made and what they cost.
Resin vs Block Paving vs Tarmac: Which Surface Is Best? — cost, lifespan and maintenance compared.
Driveway Cost in Dublin 2026 — what you can expect to pay for each surface type.
Resin Driveway Colours — golden quartz, silver grey, charcoal and custom blends.
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