Surface dressing and resurfacing answer different problems. Surface dressing seals a road that is still sound, before water gets into it. Resurfacing replaces a surface that has already failed. Treating a sound road is the cheaper of the two, and it is the one that has been declining.
Source: Road Emulsion Association
The difference in one line
Resurfacing is what you do once a road has gone. Surface dressing is what you do so that it does not.
Surface dressing is the most widely used preventative maintenance treatment on UK local roads. It seals the existing surface against water ingress and retextures it, which improves skid resistance. It is applied to a road that is structurally sound and it keeps that road in good condition for 10 to 15 years.
Why the cheaper option is the one being skipped
Use of surface dressing on UK local roads has fallen by 46% over the past 11 years. The rise in potholes over the same period should not be a surprise.
In the first half of 2026 the REA recorded a further 6% reduction against the same period the year before. That came after the government announced a record £7.3 billion for local authorities in England over four years, to fix potholes and invest in long term road maintenance.
Every mile of surface dressing that is delayed or missed this year is a mile of road that will cost more to repair later. Preventative treatments like this remain the most cost-effective way to keep our roads in good condition, and with record funding now available, we would encourage local authorities to prioritise it before conditions deteriorate further.
Kevin Maw, Consultant and Secretary, Road Emulsion Association, July 2026
How to decide which a road needs
- Still structurally sound, surface starting to lose texture or let water in. This is what surface dressing is for, and the earlier the better.
- Surface already failed, potholes forming repeatedly, structure compromised. Sealing will not fix this. It needs resurfacing or reconstruction.
- Somewhere in between. The question worth asking is how many more winters the road has before the answer changes from the first category to the second.
The timing constraint nobody can get around
The surface dressing season runs from April to September, because warm, dry conditions are what make the binder adhere and the chippings bed in. A programme that slips past the season does not slip by a month. It slips by a year, and the road spends another winter unsealed.
Who holds the data
The REA collects surface dressing figures directly from its member companies, who cover every major UK producer of bitumen emulsion. It is the only continuous national record of how much surface dressing is actually laid on UK roads.
See the case in full
The campaign sets out the evidence, including local authority case studies showing what preventative maintenance achieved in practice.
Future proofing our local roads Download the evidence Ask the REA