A facade is exposed every day to sunlight, rain, dust, movement and use. Its glass and metal may look almost unchanged for years while small problems develop at joints, drains and moving parts. Maintenance is therefore a planned engineering task, not a reaction to a visible leak. The building owner needs a safe way to inspect the envelope, a record of what was installed, and a method for deciding which findings are urgent. This checklist helps a facilities team start that conversation; the project manual and a qualified facade specialist should set the final plan.
Start with the handover record
Collect approved shop drawings, as-built elevations, glass schedules, coating specifications, test reports, warranty terms and the supplier's cleaning instructions. Mark which windows open, which panels can be removed and where access equipment can be supported. Photograph each elevation at handover, including representative joints, corners and sill details. This baseline makes it easier to distinguish a new defect from an old stain or an intentional joint. Store revisions together: a drawing from tender may not describe what was finally installed.
Give every report a location that another person can find. Use a floor, elevation, grid line and panel number where available. A note saying 'leak on the west side' is difficult to act on; a photograph tied to a window reference and the date of a storm is useful evidence. Log repairs with the product used and the contractor who did the work. That history helps reveal repeated failures at one detail rather than treating each call-out as unrelated.
Inspect from a safe position
Plan access before scheduling a close inspection. Ground-level viewing can reveal broken glass, loose covers and staining, but it cannot show the condition of every upper-floor seal or fixing. Rope access, a cradle, a mobile platform or internal access may be appropriate depending on the building. The access method, edge protection, exclusion zone and rescue arrangements belong in a site-specific safe-work plan. Do not ask cleaners or occupants to lean out of windows to check an external joint.
On each elevation look for glass cracks, chips at exposed edges, unusual movement, damaged gaskets, displaced pressure plates, loose caps and open perimeter joints. Rust-coloured staining, white deposits or a recurring damp patch may identify a water path, but the source can be above or beside the visible mark. Photograph the whole bay before a close-up. Escalate loose panels, damaged overhead glazing and cracked balustrade glass promptly; they need a competent assessment rather than a routine cleaning ticket.
Keep water routes open
Many windows and facade systems manage incidental water with drained cavities. Check that sill tracks, weep openings and drainage slots are free of leaves, grit, sealant and paint. Clean gently with tools approved by the system supplier; a sharp probe can damage a gasket or a concealed baffle. If water is collecting, document the conditions before clearing it. A blocked outlet may be the cause, but an unexpected volume of water may indicate a failed outer seal, incorrectly fitted component or problem at the wall interface.
Look inside after heavy rain for fresh staining, swollen finishes or damp insulation. An interior mark does not necessarily sit directly behind the entry point. Water can travel along a transom, bracket or slab edge before appearing in the room. Avoid sealing every external gap as an improvised repair: some openings are intentional pressure-equalisation or drainage paths. Trace the designed route on the shop drawings and diagnose the assembly before changing it.
Check seals, hardware and finishes
Gaskets should stay seated and continuous at corners. Look for shrinkage, hardening, tears and compression loss. Sealant joints should be inspected for separation, cracking and loss of adhesion, particularly where different materials meet. Replacement sealant must be compatible with the original system and its movement allowance; simply putting a new bead over a failed one can hide a wet or dirty bond surface. Structural glazing needs specialist inspection and repair procedures because its silicone has a load-bearing role.
Operate representative windows and doors. Stiff operation, a sash rubbing its frame, a loose handle or a damaged restrictor may point to hardware wear, frame movement or poor adjustment. Do not force a large sash closed. Clean and lubricate only as the hardware maker specifies, then check that the leaf closes and seals consistently. Review coatings for scratches, corrosion at cut edges and damage from harsh cleaning products. Test a proposed cleaner on an inconspicuous area and rinse it as instructed.
Turn findings into a plan
Separate immediate safety actions from planned repairs and ordinary cleaning. A cracked pane above an entrance, an insecure panel or a loose railing demands controlled access and prompt specialist advice. A worn seal may be scheduled, but recurring water entry needs investigation before finishes are repaired. Record the action owner and due date. If several bays share the same defect, sample more of that elevation rather than assuming it is isolated. The purpose of inspection is to catch a pattern early, while a repair is still local.
Review the log after storms, building alterations and facade work by other trades. A new sign, cable or cleaning anchor can compromise a weather seal or an aluminium member. Keep spare components and the replacement specification identifiable; a pane with the wrong make-up can alter safety, appearance or thermal behaviour. A good maintenance programme preserves the design intent of the whole envelope and gives the next facilities team enough information to continue it.
Use a simple inspection schedule
A practical schedule distinguishes routine observation from close technical inspection. Cleaning staff can report a cracked pane, blocked sill or loose handle during ordinary work, but they should not certify anchors or structural joints. A facilities supervisor can compare photographs and logs after seasonal weather, while a qualified specialist examines areas that need access equipment or technical judgement. Assign responsibility for arranging each review and for closing findings. If a building has different exposures, the storm-facing side, roof glazing and busy entrance doors may need a different inspection priority from sheltered fixed windows.
Set triggers as well as dates. Call for a targeted inspection after impact, an unusual wind event, facade alterations, water entry or repeated trouble with one window type. Review the neighbouring bays when a defect suggests a shared installation detail. A repair contractor should explain whether work is temporary or permanent, what was inspected beyond the visible symptom, and whether a follow-up visit is needed. A dated record of 'no defect observed' is useful too: it helps establish when a change first appeared.
Budget for maintenance access when the facade is designed, not after the first leak. A building with no safe route to high glass or concealed gutters will pay more for every inspection and repair. Ask the design team how cleaning plant, replacement glass and personnel reach each elevation. Check that rooftop anchors, cradles and access points have their own inspection and operating instructions. Maintenance is part of the life of the envelope; a beautiful detail that cannot be reached will not stay in its intended condition by itself.
General guidance for orientation, not a specification. Applicable standards, values and details are confirmed per project with the facade consultant.
