Professional window cleaning improves a building’s appearance and glass longevity by safely removing salt, mineral deposits, bird waste, pollution and abrasive dirt before they form stubborn stains or contribute to surface damage. A qualified building window cleaner can also spot cracks, failed seals and façade defects that may be hard to see from the ground. For Sydney building owners, the issue is bigger than having streak-free windows. Glass is part of the building envelop