Why should a glass roof or canopy be assessed for fragility before cleaning?

Why should a glass roof or canopy be assessed for fragility before cleaning?

Glass roofs and canopies should not be treated as working platforms. Appearance, toughening or reinforcement does not establish that a panel is safe to stand on. Age, damage, fixings and undocumented changes can introduce risks not obvious from below.

Planning uses drawings, maintenance information and competent assessment of the roof and surroundings. Glazing, neighbouring rooflights and proposed access systems need consideration together. Uncertainty requires further assessment rather than assuming access is acceptable. No part of the cleaning plan should rely on walking on unverified glazing.

Appropriate ground-level working or access equipment may avoid loading fragile surfaces, depending on the site. Frames, seals and drainage also influence the method. Suspected instability or damage calls for deferral and specialist advice. Share available records and known defects before requesting a quote. Cleaning removes suitable contamination; it does not establish load capacity or certify a canopy safe for overhead public use.