What maintenance requirements should facility managers expect for long-term glass exterior walls performance?

Routine maintenance preserves performance and extends façade life. Facility managers should schedule regular external glass cleaning intervals based on environment (urban, coastal, industrial): typically quarterly to biannual cleaning for city centers; more frequent in aggressive coastal or industrial atmospheres. Sealant and gasket inspections should occur annually to detect UV degradation, adhesion failure, or compression set; perimeter sealants and structural silicone lifespans vary but often require replacement every 10–20 years depending on exposure. Drainage paths and pressure equalization cavities must be checked and cleared to avoid water accumulation and freeze-thaw damage. Fasteners, anchor bolts, and thermal break integrity should be inspected periodically for corrosion or loosening. For laminated units, check for edge delamination or moisture ingress (fogging); insulated glass failures may require unit replacement. Preventive actions include maintaining joint movement capacities, re-applying protective coatings where permissible, and promptly repairing damaged glass to avoid progression. Documented maintenance manuals, vendor recommended intervals, and a façade asset register (including serial numbers, glazing types, and mockup details) help manage lifecycle tasks. For high-rise façades, engage qualified façade access contractors and plan for abseil/crane/window-cleaning platforms maintenance. Lastly, budget for periodic resealing and replacement components to avoid unexpected capital expenditure.