Can glazing be cleaned where a building has leaks or deteriorating seals?

Can glazing be cleaned where a building has leaks or deteriorating seals?

Reported leaks and deteriorating seals should be considered before cleaning is planned. Water entry may relate to joints, drainage or interfaces with surrounding construction. Exterior cleaning does not diagnose its cause, and additional water at a suspect location can expose or aggravate an existing problem.

The building manager should identify known locations and share inspection findings or care guidance. Where condition is uncertain, a competent façade or glazing specialist may need to assess it first. Affected sections might be excluded or postponed until repairs are complete, depending on that advice.

Weather seals and structural components have different roles that cannot be established by a casual ground-level inspection. Routine cleaning should not probe, remove or replace sealant. An agreed plan respects the assembly's condition without offering assurances that washing will resolve leaks or confirm its safety. Provide details of previous water ingress when enquiring, even if the façade currently appears dry.