With a heritage in road maintenance and surface dressing that dates back more than a century, we help public sector and private company clients save money, reduce maintenance requirements and manage health and safety risk. Our innovative pothole prevention technology has been proven to assess the risk of potholes in roads and deliver targeted, effective treatment that seals cracks and fissures to stop potholes from forming.

Using advanced in-cab computerised technology, our system enables our trained in-house operatives to visualise the road surface, identify areas at risk and apply a tailored and targeted combination of binder and dressing to protect the road surface from pothole formation. Our system is more cost-effective and less disruptive than repeated patch repairs, with lower labour and plant requirements and shorter work programmes. With potholes now becoming a major cause of public dissent and insurance claims, our approach provides a long-term solution that minimises risk and maximises the service life of roads, enabling a planned approach to road maintenance.

For roads that are already too compromised for treatment, we also offer SAMI, a system designed to provide a protective barrier between the swept road surface and the new surface dressing. Proven and widely-used in the USA and Australia, this approach provides a cost-effective, practical and durable alternative to costly pre-patching, crack repairs and full overlays.

Henry Williams & Sons is pioneering both these technologies in the UK as part of our continuing commitment to providing excellent service levels and ground-breaking innovation for the road maintenance sector. In addition to surface dressing, our portfolio of services also includes:

  • Surface Dressing
  • Retread
  • Bond Coating
  • Civil Engineering
  • Fencing
  • Carriageway Recycling
  • NRWSA and Section 28 works

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Surface Dressing

  • Preventative maintenance solution
  • Highly cost-effective when compared to other surfacing options.
  • Adds decorative and aesthetic value
  • Fast application minimises disruption
  • Single, double dressing and racked-in dressing
  • Choice of binders from any UK supplier which includes Polymer Modified Binders (PMB). Aggregate of all sizes 6mm, 10mm, 20mm and in a variety of colours available.
  • Bespoke plant and specialist tankers of all sizes designed for use on footpaths, towpaths, private roads, housing estate roads, carriageways of all types of road classes including motorway highways and car parks.


  • Essentially a recycling process in which the existing aggregate in the road is used, bitumen emulsion is added, and the road is reshaped.
  • It involves scarification (or road planing) of the existing carriageway and the re-introduction of fresh hot bitumen into the recycled material.
  • Once sufficient bitumen has been mixed into the carriageway, then a final re-profiling and re-compaction is completed before the carriageway is sealed with a light surface dressing and reopened to traffic.
  • Suitable for use on lightly trafficked roads and has been used successfully in both urban and rural situations.

Bond Coating

  • Using polymer modified bitumen emulsions at binder course and surface course levels specifiers have improved the bonding and tensile strengths leading to improved durability, performance, and longevity.
  • We offer a range of emulsion tanker sprayers from 18,000 litres sprayers to footway sprayers at 1.00m wide.  All plant is depot tray tested in accordance with BS1707 and we regularly carry out carpet tile testing to ensure that specified spread rates are achieved.
  • Our combination sprayers are capable of carrying out the bond coating as well as the application of a 50-pen polymer modified bitumen sprayed directly against the vertical face of surface courses and / or binder courses. It is also possible to over-band and spray the free-face to verge-side carriageways.

Civil Engineering

Maintenance and up-grading of their roads and car parks, including:

  • drainage works
  • car park construction
  • access roads
  • service provisions including street lighting, data and telecoms
  • DDA provisions and footway works


Our gangs are fully compliant for NRSWA and Section 278 works.



Domestic, Industrial, Agricultural, Amenity Fencing

  • We currently operate 4 no. suitably experienced and trained fencing gangs for the installation of all types of steel and timber fencing types.  We offer design and installation services and welcome the opportunity to be involved at design stage to ensure the correct results, within budget.

Specialist Screening

  • Recent trends in the industry have lent towards natural screening in the form of living walls and rock cages.  These provide an alternative to the more tradition fencing options and have provided our clients with aesthetically pleasing results.