A commercial estate manager called us in to assess a tired aluminium curtain wall system on a central London frontage. The powder coat had chalked through, sills were biological staining and the glazing edge gaskets had run with run off. Replacement would have meant scaffolding the unit closed for the better part of a month.
We surveyed frame by frame, identified the substrate as restorable (gloss meter readings + cross hatch adhesion test passed), specified a two pack tie coat over light abrasion, and applied a matched RAL anthracite topcoat at 60-80 µm dry film. No glazing was removed. Restoration was delivered live around the ground floor retail trade.
Total cover: approximately 320 m² of curtain wall frame and sills, restored over a three week shift pattern. Adjacent glazing, ironmongery and signage were masked through to demask. Service life expectation issued in writing on handover: 5-7 years on the substrate as surveyed.