Façade quality cannot be verified through one final inspection. Once a seal, anchor or membrane has been concealed, correction becomes difficult and expensive. An effective QA/QC plan places control where a decision or activity can still be corrected.
From requirements to the Inspection and Test Plan
The ITP links each critical activity to acceptance criteria, an inspection owner and a record. Hold points may require approval before fabrication, before anchors are concealed or before internal finishes close an interface. Witness points allow supervision without stopping the workflow unnecessarily.
Samples and visual mock-ups
Samples confirm colour, gloss, texture, sealant and basic joints. A visual mock-up assesses a larger composition: joint alignment, reflections, shadows, corners and material transitions. The team should agree exactly what the mock-up approves and which aspects remain governed by technical tolerances.
Performance mock-up
A performance mock-up represents critical zones and interfaces in a controlled environment. The test programme follows project requirements and may include air permeability, water penetration under static or dynamic pressure, structural loading, movement or impact. Sequence matters because one test can affect the next.
Factory inspection
Incoming materials, cutting dimensions, machining, corner joints, surface preparation, sealant application, setting blocks and final assembly need defined checkpoints. Traceability connects a site finding back to a batch, date and fabrication process.
Site inspection and testing
Site inspection focuses on anchors, tolerances, membranes, perimeter seals, glazing, drainage openings and other-trade interfaces. Field water tests can identify discontinuities at specific openings or zones. Results should be recorded with corrective action and retesting, not left as verbal observations.
Snagging and handover
Completion requires closure of non-conformities, safe cleaning of finishes, adjustment of operable elements and delivery of as-built drawings, certificates, warranties and O&M information. A clear digital record reduces uncertainty in operation and future maintenance.
QA/QC is not administrative burden when correctly designed. It is the mechanism that turns technical intent into repeatable fabrication and verifiable installation.