Failed fixings and washers
Water can enter around aged or loose fasteners and then travel beneath the sheet before becoming visible internally.
Commercial leak diagnosis
Commercial metal roofleak diagnosis.
We trace leaks across profiled metal roofs because the internal stain is often some distance from the point where water enters.
Direct answer
A leaking metal roof should be traced across fixings, laps, rooflights, flashings, penetrations and drainage. The correct repair depends on the water path and the condition of the surrounding roof.
Problem → diagnosis → response
How the defect affects the repair scope.
Side and end laps
Wind-driven rain, movement and failed seals make joints a frequent entry path on large profiled roofs.
Rooflights
Ageing sheets, kerbs, seals and interfaces around rooflights can leak while adjacent metal appears sound.
Flashings and penetrations
Ridges, verges, abutments, vents and pipe details often need targeted investigation and re-detailing.
Gutters and outlets
Overflow, failed joints and backing-up water can mimic a roof-sheet leak and wet internal areas away from the defect.
Corrosion or perforation
Cut edges and sheet bodies can eventually lose enough material to become direct water-entry points.
Repair, refurbish or replace
How repair and refurbishment options are compared.
Trace and repair
For a verified local source within otherwise serviceable sheets and details.
Refurbish the roof
For repeated water paths, widespread detail failure, corrosion or coating breakdown requiring a coordinated scope.
Replace failed areas
For perforated or damaged sheets, failed rooflights or components that cannot be retained reliably.
When this route is not enough
A single patch is not enough where water has multiple entry paths, defects repeat across bays, sheets or rooflights have failed, or drainage and wider corrosion remain unresolved.
How the work is specified
From inspection findings to a scope of work.
- 01Record when and where water appears, including wind and rainfall conditions.
- 02Inspect the roof above and upslope of the internal symptom.
- 03Check fixings, laps, rooflights, flashings, penetrations, gutters and outlets.
- 04Separate primary entry points from internal water tracking and condensation.
- 05Confirm whether a local repair can remain reliable in the surrounding roof.
- 06Specify, test and document the repair or wider refurbishment scope.
Clear answers
Metal roof questions, answered
Metal Roof Refurbishment Cluster
Related metal roof resources
Technical guidance across the metal roof condition-to-coating lifecycle — corrosion, cut-edge failure, repairability, preparation, protective coating, inspection and cost.
Your roof. Your next step.
Need the leak traced before another repair?
Send the postcode, roof type, approximate area, visible defects and wide plus close-up photographs. We will help establish the next technical step.