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Providing specialist maintenance and support

Our experienced and multi-skilled workforce deliver an extensive range of services day in and day out.

We operate on a national basis and always respond to our clients needs without ever compromising safety. Our collaborative approach gets us involved early in the process to manage risks and uncertainty by anticipating and resolving potential issues.

Show all  |  Filter: Civils / Infrastructure  |  Drainage  |  Surveys  |  Technology  |  Remediation  |  Management

Our Services

We are a multi-discipline highways maintenance provider that concentrates on working with our clients and suppliers to improve value and develop innovative techniques, which provides sustainable solutions whilst keeping our workforce safe. We have broadly split our areas of work into Drainage, Infrastructure, Specialist Surveys and Technology, however these services overlap, with teams often working together to effectively achieve our clients’ objectives.


At Carnell, we have the expertise to successfully deliver both new-build and maintenance schemes for civils infrastructure on the highways. Our dedicated service teams will work with you, from planning and design through to commissioning and implementation. The breadth of experience gained over the last two decades and a multi-skilled workforce ensure that we can successfully deliver any project, from footpath installation to full highway depot construction.


Following the introduction of our pioneering STONEmaster filter drain refurbishment process in 2003, Carnell have continued to invest in developing cost-effective, sustainable solutions for the repair, refurbishment and installation of drainage networks. Our Drainage services reflect Carnell’s strong commitment to innovation and process development, fuelled by continual improvement and an appreciation of environmental and sustainability implications.

Specialist Surveys

Carnell offer a comprehensive range of drainage investigation services which provide greater insight into asset attributes and condition. Using this knowledge, Carnell can assist with the asset management process so that infrastructure managers meet the increasing legislative and maintenance challenges. Through investment in to the latest technologies and development of our experienced in-house teams, Carnell provide the most reliable and complete solution.


Carnell partners with Highways England and their technology service providers, to install and maintain roadside communications assets such as variable message signs, CCTV equipment, emergency telephones, ramp-metering systems and the associated electronic apparatus. We are also a framework contractor to carry out maintenance work on the National Roads Telecommunications Service (NRTS) Project including Transmission Stations.


Following our specialist surveys or those of our clients there is often a requirement to fix the highways asset using targeted and cost-effective solutions. An in-depth knowledge of highways drainage has led to the development of innovative techniques for filter drain remediation. Our in-house Technical Services team is able to diagnose the problem and make recommendations. We provide the full range of repair techniques for piped drainage including no-dig solutions.


When Carnell are involved in a scheme we aim to make everything run as smoothly as possible for the client. Our team will participate in Early Contractor Involvement and contribute to planning and project management as required. We employ a fully managed solution so that we can engage other supply chain and specialist activities where necessary. Certification to ISO 9001, ISO 14001 and BS OHSAS 18001 shows that we have the appropriate management systems in place.