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Heathrow Airport’s British Airways West Car Park on Northwood Road is a high-capacity, multi-storey parking asset subjected to round-the-clock operational vehicle movements. With future redevelopment planned for the facility, asset managers required an urgent structural intervention to arrest ongoing deck deterioration, safeguard active parking bays, and extend the safe working life of the post-tensioned suspended slabs during the interim service period.
Working under principal contractor M Group Ltd, Structural Repairs delivered an engineered remedial package encompassing non-destructive delamination surveys, concrete breakout, structural reinstatement, deck waterproofing patch repairs, and drainage joint refurbishment.
Multi-storey car parks within Heathrow’s active perimeter experience an exceptionally demanding operational environment. Decades of continuous vehicle traffic, thermal movement, and the relentless tracking of de-icing salts from winter road networks accelerate chloride ingress into suspended slabs.
The car park could not be closed. All mechanical breakout, surface preparation, and chemical resin applications required mobile physical segregation, dust extraction at source, and strict noise control to ensure zero disruption to airport staff and transport operations
All works adhered strictly to BS EN 1504 concrete repair standards using factory-blended structural systems.
Prior to invasive mechanical breaking, technicians conducted a systematic acoustic hammer-tap survey across 27 designated soffit zones from mobile aluminium scaffold towers. By mapping the hollow, low-frequency reverberations of subterranean delamination against clear acoustic ringing from sound concrete, technicians precisely demarcated defective boundaries while avoiding unnecessary breakout around sensitive post-tensioned tendons.
Hammer based acoustic concrete testing
Controlled breakout repair
To shield high-wear zones against rainwater and de-icing chemicals, 110m2 of prepared deck surface was coated with a two-component polymer-modified treatment. This membrane forms a seamless, crack-bridging, fully bonded waterproof layer capable of resisting extreme freeze-thaw cycles and chemical exposure.
Rebar Passivation: applying a polymer-modified slurry to reinstate the alkaline passivating layer and halt active electrochemical corrosion
From diagnostic scanning and precision delamination mapping to structural reinforcement and high-performance deck waterproofing, Structural Repairs delivers engineered life extension for critical commercial infrastructure.
