Reinforced Autoclaved Aerated Concrete with degraded fire resistance threatens patient safety across the NHS.. RAAC Fire Safety Implications RAAC was widely used in UK public buildings from the 1950s 1990s. Age related degradation reduces its fire resistance. Key Concerns RAAC panels may not achieve their original fire resistance rating Moisture ingress accelerates degradation Collapse risk under fire exposure Survey access difficulties in operational hospitals Remediation cost competing with clinical budgets For RAAC fire assessment, contact us.