Safety alert: risk of window hinge failure in high-rise buildings

A safety concern has been raised over fully reversible windows installed in high-rise residential buildings after multiple incidents where window casements fell from building façades.

The windows, installed during refurbishment works around ten years ago, are designed to rotate inward for cleaning, but suspected hinge failures have caused them to detach, posing serious risks to people below.

The issue first came to light when a resident reported a falling window to CROSS UK. Shortly after, two similar incidents occurred in separate buildings. Investigations by the local authority found that the reversible pivot hinges had failed, allowing the windows to fall. Authorities confirmed that high winds were not a factor, and noted that the hinges are difficult to inspect from inside the building.

In response, residents have been advised not to operate the reversible function, and affected windows have been secured with heavy-duty chains. The local authority is seeking urgent funding to replace the windows entirely.

A building control reporter warned that similar window systems may exist in other high-rise buildings and called for industry-wide awareness to prevent further incidents.

Expert Panel concerns

An Expert Panel for CROSS UK which reviewed the report highlighted that the root cause of the hinge failures is unclear. It could be due to fatigue, misuse, or insufficient strength. Regardless, the consequences of such failures are severe: falling windows can cause injury or death, while leaving a large unprotected opening that endangers residents.

The Panel noted that while wind was not a factor in these cases, high-rise windows must be designed to withstand gusts and environmental exposure, particularly in coastal locations where corrosion may accelerate hinge deterioration. They also emphasised that window systems suitable for low-rise buildings may not be appropriate for high-rise use.

Experts recommend that reversible windows in tall buildings be subject to regular inspections, with hinges photographed or otherwise assessed for potential failure. They also advise considering alternative designs, such as fixed windows with secondary inward-opening panels for ventilation and cleaning, to reduce risk.

The full report is available to read here.