Living with RAAC: Lessons from Asbestos Management

In a recent article by Thomas Johnson for New Civil Engineer, structural engineers have drawn an interesting parallel between reinforced autoclaved aerated concrete (RAAC) and asbestos in UK buildings. As experts in structural engineering with extensive experience in RAAC identification and management, we at Gurney Consulting Engineers find this comparison both apt and thought-provoking.

RAAC, a lightweight building material popular in the 1960s and 70s, has recently come under scrutiny due to its potential for sudden failure and collapse. This has led to widespread concern, particularly in schools and hospitals where RAAC is commonly found. However, as structural engineer Stuart Tappin points out, the solution may not lie in wholesale demolition, but rather in learning to manage RAAC's presence effectively.

The article highlights that, much like asbestos, RAAC can be managed safely within existing structures. This approach aligns with our philosophy at Gurney Consulting Engineers, where we prioritise thorough assessment and tailored solutions for each project we undertake.

The RAAC crisis came to public attention last year when the Department for Education closed several schools due to safety concerns. In response, the government has committed to removing RAAC from 234 schools, with over half of these undergoing significant rebuilding or refurbishment.

While the use of RAAC was justified at the time of its popularity, experts now emphasise the importance of designing buildings with long-term maintenance in mind. Alex Baldwin, a chartered building surveyor quoted in the article, stresses the need for construction methods that allow for easy replacement of components without disrupting the entire structure.

Interestingly, the article dispels a common misconception about RAAC's lifespan. Contrary to popular belief, RAAC itself doesn't have a 20-30 year design life. Instead, it's the waterproofing on top of RAAC that has a limited lifespan, highlighting the importance of regular maintenance and inspection.

At Gurney Consulting Engineers, we recognise that RAAC isn't limited to post-war buildings. As Catherine Croft from the 20th Century Society points out, RAAC was also used in repairs and extensions of older buildings. This underscores the need for comprehensive surveys and expert assessment in buildings of all ages.

The article also touches on the challenges of managing RAAC in listed buildings. With an estimated 1,000 listed buildings potentially containing RAAC, there's a pressing need for guidance on remediation that respects the building's protected character. This aligns with our commitment at Gurney to providing tailored, sensitive solutions for historic and listed buildings.

As structural engineering experts, we at Gurney Consulting Engineers are well-equipped to handle the challenges posed by RAAC. Our team of experienced chartered engineers specialises in identifying RAAC, assessing its condition, and developing appropriate management or remediation strategies.

We understand that each building is unique, and our approach reflects this. Whether it's a school, hospital, or listed building, we provide comprehensive structural engineering services, from initial inspections to detailed remediation plans. Our goal is to ensure the safety and longevity of buildings while respecting their historical and architectural significance.

The comparison between RAAC and asbestos management offers a valuable perspective on how we can approach this challenge. By learning to live with RAAC through careful management and targeted remediation, we can maintain the safety and integrity of our buildings without resorting to unnecessary demolition.

As the construction industry continues to grapple with the legacy of RAAC, Gurney Consulting Engineers remains at the forefront, offering expert guidance and innovative solutions. We're committed to helping building owners and managers navigate this complex issue, ensuring the safety of occupants while preserving our built heritage.

If you have concerns about RAAC in your building, or if you'd like to learn more about our structural engineering services, please don't hesitate to contact us. Our team is ready to provide the expert advice and support you need to manage RAAC safely and effectively.