Commercial roofing knowledge and technical guidance.
Written for the people who have to make the decision: surveyors, estates and facilities teams, and building owners. Guidance on diagnosing roof defects, choosing between repair, coating, overlay, over-clad and replacement, and planning works on buildings that stay in use.
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Start from the decision you are making.
Work out what the roof needs
Guidance on surveys, defect diagnosis and the choice between repair, coating, overlay, over-clad and replacement.
Plan budget, programme and disruption
How commercial roof works are costed, sequenced and delivered on buildings that stay in use.
Guarantees, safety and long-term performance
What guarantees actually cover, how roof access is made safe, and how energy or solar work affects the roof.
Ask TRS Technical
A specific question? Ask the TRS technical team.
Have a question about a commercial roof, proposed refurbishment or technical detail? Submit it to the TRS technical team for practical guidance.
- · General guidance may be anonymised and published with permission.
- · Project-specific advice may require a roof survey or further assessment.
- · Submitting a question does not constitute a design, specification or quotation.
Budget & Programme
Guidance on budget & programme.
Budget & Programme
The Commercial Roof Decision Framework
A practical framework for deciding when to repair, when to refurbish and when to replace a commercial roof, based on condition and risk rather than age.
TRS RoofingUpdated 5 Aug 20269 min readRead: The Commercial Roof Decision Framework
Roof Surveys & Defects
Commercial roof guarantees explained
Clear explanation of product guarantees, insurance-backed guarantees, metal coating guarantees and single-point guarantees that cover workmanship. Practical guidance for surveyors and estates managers.
TRS RoofingUpdated 31 Jul 20266 min readRead: Commercial roof guarantees explained
Operational Continuity
Planning a Public-Sector Roof Refurbishment
Public-sector roof projects usually run on occupied buildings, with governance, documentation and audit requirements attached. This guide sets out what to establish before a scheme goes out to tender.
TRS RoofingUpdated 2 Aug 2026Read: Planning a Public-Sector Roof Refurbishment
Roof Surveys & Defects
Flat and metal roof defects that create infection and water-ingress risks in hospitals
Water ingress on a hospital roof is never just a building-maintenance issue. When it occurs near clinical areas it can create infection risks, damage expensive equipment, generate mould, and produce slip hazards for staff and patients.
TRS RoofingUpdated 27 Jul 20266 min readRead: Flat and metal roof defects that create infection and water-ingress risks in hospitals
Guidance by sector
Roofing guidance by building type.
Speak to TRS
Start with a free initial roof survey
Send a brief description of the building and roof. The initial roof survey and site visit are free of charge, and a member of the TRS team will be in touch to arrange it.