Robertson pioneers UK-first construction solution for roofing works

The 35m-long air-filled tent structure has been adapted and engineered to be installed at height on the roof of the hospital while it remains operational. This is the first time this technology has been used as part of a roofing solution in the UK by a Tier 1 contractor.

Providing a fully weatherproof working environment, the structure is inflated using a constant-flow air system and powered by the hospital’s carbon-free mains electricity. Each modular tent can be fully deployed in just seven minutes and deflated in three. 

The works will see 100% of the maternity unit’s RAAC roof replaced alongside new mechanical and electrical systems installed, forming a key part of the wider project that addresses RAAC across the hospital. 

The use of traditional scaffolding posed significant logistical challenges for the hospital due to the roof’s complex layout, interconnected buildings and the need to maintain 24-hour access to critical areas including the hospital’s oxygen store. By using lightweight scaffolding and a modular tent system, Robertson has been able to maintain continuity of the programme while minimising disruption to hospital operations and ensuring the safety, privacy, and comfort of patients and staff. This innovative solution allows services to remain fully operational, whereas a traditional approach would have caused substantial disruption and interference with essential activities.

Robertson developed the custom tent modules through a rigorous temporary works design process. The tents are quick and easy to move and install, offering greater flexibility and agility in the programme as there is no requirement to wait for lengthy changes to traditional scaffolding as the works progress. The tents are also designed for long-term use unlike traditional sheeting which is often scrapped after single use.

In total 13 tents, with integrated personnel doors for improved logistics, material handling and safe access routes, will be used over the 40-week roof replacement programme. 

Elliot Robertson, Chief Executive Officer, Robertson Group, said: “We are always looking for new innovations that help us deliver high-quality projects and services for our customers. This initiative demonstrates what’s possible when our teams challenge convention, share expertise, and embrace innovation to deliver real value for our customers and the communities they serve. As the partner of choice for the Trust to deliver essential RAAC replacement and create modern, safe, and welcoming healthcare environments we needed to find a solution that didn’t impact on the day-to-day operations at the hospital. 

“We hope this redefines how complex roofing and refurbishment works can be delivered across our industry and inspires the exploration of smarter, more sustainable ways of working.”

Annette Walker, Chief Finance Officer at Bolton NHS Foundation Trust, said: “We’re really pleased with the progress to transform our Maternity and Women’s Health Unit into a space that’s safe and better equipped for patients and staff.

“This is a key phase of the work as we carefully remove the RAAC.

“This multi-million pound transformation is a significant investment in the future of healthcare for Bolton by creating a modern, state-of-the art Maternity and Women’s Health Unit to provide life-changing care for years to come.”

The Fast Tent product is supplied by Njordair. Its Director and Co-Founder Aubrey Kingsbury added: “Out of almost a decade of experience, we have never seen our product used in this way in the UK. Fast Tent is made from heavy-duty, flame-retardant PVC and can withstand high winds and the toughest of weather, making it well-suited for this project. It’s been a pleasure working alongside Robertson, whose attention to detail and commitment to innovation have taken an already proven product to the next level.”

Bolton NHS Foundation Trust appointed WeBuild Healthcare as main contractor for this project with Robertson as the delivery partner through Lot 2 of ProCure23, part of Crown Commercial Service's Construction Works and Associated Services Framework.