IN Brief:
- Wrekin Products argues that specification and installation quality must be considered together when selecting manhole covers and gully gratings.
- Its industry survey found 52% of respondents questioned traffic-readiness and 96% questioned whether standards reflect changing rainfall and temperatures.
- The AIA ALARM 2026 survey estimated an £18.62bn carriageway repair backlog across England and Wales and 12 years to clear it.
Civil engineering products manufacturer Wrekin Products has called for greater attention to the durability and installation of manhole covers and gully gratings as local road authorities face mounting maintenance demands. Its whitepaper, The Evolving Needs of UK Roads, examines how constrained budgets, changing traffic use and more demanding weather conditions affect highway assets. The report argues that repeated short-term road repairs can leave surrounding ironwork more exposed to movement and failure, creating further interventions where a longer-life repair might have reduced disruption.
The publication brings together interviews with highways and local authority representatives and findings from Wrekin’s own industry survey. In that survey, 52% of respondents said they did not believe existing UK infrastructure was prepared for changing traffic patterns, while 96% said design and maintenance standards were not keeping pace with heavier rainfall and hotter summers. These are reported views of survey participants, not a measured failure rate across the road network. The sample size and survey methodology have not been publicly established, so the percentages should be treated as reported respondent views.
The report follows the Asphalt Industry Alliance’s Annual Local Authority Road Maintenance survey for 2026, which estimates that authorities in England and Wales face an £18.62bn one-off backlog of carriageway repairs. The AIA calculates that clearing the backlog would take 12 years at the assumed level of work, despite a 17% increase in average highway maintenance budgets. Its survey also found that 16% of the local road network, representing more than 32,500 miles, has less than five years of structural life remaining. The geographic coverage of those figures is England and Wales, rather than every road in the United Kingdom.
Highway ironwork forms an interface between the road pavement and chambers or drains below it. A manhole cover provides access to buried services, while gully gratings allow surface water to enter the drainage system. The cover or grating has to carry traffic loads through its frame and bedding into the supporting structure, with its upper surface maintained at the correct level relative to the road. If the bedding, frame support or surrounding reinstatement deteriorates, movement can concentrate stresses at the pavement edge. Cracking and settlement around the opening may then become part of a cycle of patching and repeat repairs, even if the removable cover itself remains intact.
Specification therefore involves more than selecting a strong casting. The frame has to be suitable for the loading and location, the bedding and chamber support need to transfer forces reliably, and the surrounding surfacing must be reinstated to a sound level and profile. Products designed for a given loading class do not guarantee satisfactory service if the bearing area, bedding or installation sequence is inadequate. Conversely, installing an otherwise well-supported frame with unsuitable material or geometry may increase the risk of damage from repeated wheel loading. Wrekin’s emphasis on installation standards addresses this interaction between a manufactured component and the pavement system around it.
The whitepaper also examines the consequences of relying on reactive maintenance. Temporary or localised surface repairs can be necessary to remove immediate hazards, but they may leave the underlying cause of deterioration unresolved. Work around an ironwork opening can involve breaking out defective surfacing, inspecting the chamber support, resetting or replacing the frame and restoring the pavement. The required scope varies with the condition encountered. A report contributor, Mike Hansford, chief executive of the Road Surface Treatments Association, argued that a greater emphasis on planned permanent treatments would be more cost-effective and reduce the repeated use of resources compared with short-term repairs.
Wrekin’s Paul Thompson, technical specification and sustainability manager, linked durable products and correct installation to road resilience and the potential to reduce repeat interventions. Steve Carmody, a trustee of the Chartered Institution of Highways and Transportation, also emphasised training, observing that product performance can be undermined by poor installation. Independent comparative data on failure rates or whole-life carbon for the specified products have not been published. Any savings in material use, vehicle movements or traffic management would depend on the repair avoided and the service life actually achieved.
Rainfall presents a further practical consideration because surface water needs effective routes into the drainage network. Gully positions, grating openings, pavement levels and the capacity of downstream pipes all affect how quickly runoff can drain. A sound grating and frame cannot compensate for a blocked drain or a network that lacks hydraulic capacity. Heavier vehicle loading and higher temperatures can likewise influence the surrounding pavement, so choosing robust ironwork is one element of a wider programme of pavement design, inspection and maintenance rather than a substitute for it.
The AIA’s separate survey reports that local roads in England and Wales are resurfaced on average once every 97 years, and that approximately 1.9 million potholes were filled during the latest reporting period. Those figures describe wider maintenance pressures, rather than outcomes attributable to ironwork. Wrekin’s whitepaper was publicly reported in early October. Its recommendations focus on longer-life specification, competent installation and planned repairs, while the actual impact on maintenance costs will need evidence from completed and monitored highway schemes.
