31 August 2026
Gorton Market Got the Order Right: Fix the Roof Before Installing Solar
Gorton Market appears to have followed a sequence that should be obvious and still is not: deal with the roof, then install the solar panels.
Solar panels generate electricity. They do not restore the service life underneath them.
Manchester’s work at Gorton Market included a replacement roof covering and solar photovoltaic installation. That order matters. A long term solar asset should not be fixed above an uncertain roof and treated as somebody else’s future access problem.
Should a commercial roof be surveyed before solar panels are installed?
Yes. The roof covering, structure, drainage, rooflights, fire and access arrangements, remaining service life and warranty position should be assessed before solar is approved. Where major roof work is likely during the intended life of the panels, it is usually better to coordinate the roof and solar strategies before installation than pay later to remove and reinstate the array.
A solar array is a long commitment to the roof beneath it
Manchester City Council reported that Gorton Market had received a redone roof and solar photovoltaic panels as part of wider regeneration. Separate council reporting referred to the replacement roof covering being completed to improve the building’s long term resilience.
The lesson is not that every roof must be replaced before solar. It is that the roof decision has to come first. A panel system expected to operate for decades will restrict access, introduce fixings or ballast, change maintenance routes and make later roof work more complicated.
Solar panels are not a roof repair. They are a long term asset placed above the roof problem.
If the covering has only a short credible life, the cheapest installation today may create the most expensive removal and reinstatement exercise later.
The remaining roof life must make sense beside the solar life
A commercial roof does not need to be new before solar, but the owner should understand its condition and expected life. Local defects may be repairable. A viable metal roof may support a coating or overcladding strategy. An exhausted membrane or widespread corrosion may need a more substantial intervention.
The comparison should include more than roof work alone. Scaffold, edge protection, MEWPs, cranes, internal protection, shutdowns and panel removal can form a significant part of the future cost. Coordinating the works may allow the same access and programme to serve both projects.
| Roof position | Solar decision | Reason |
|---|---|---|
| Sound roof with suitable remaining life | Proceed subject to design and warranty checks | The panel life and roof strategy are compatible. |
| Local defects on an otherwise viable roof | Repair and record before installation | Known weaknesses should not be concealed by the array. |
| Widespread ageing with a viable refurbishment route | Coordinate refurbishment and solar | Access, details and future maintenance can be resolved once. |
| Roof near the end of practical life | Replace before solar | Later removal is likely to duplicate cost and disruption. |
Panels must not make the roof impossible to inspect
Roof area is not the same as usable solar area. Arrays need to respect rooflights, smoke vents, gutters, outlets, hatches, fall protection and safe walking routes. The layout should allow people to inspect the parts of the roof most likely to need attention.
Fragile rooflights deserve particular care. Panels can make their position less obvious while creating new routes that bring maintenance workers closer to them. A rooflight that will need replacement during the solar term should be considered before the array fixes the surrounding layout.
Drainage also needs space. Panels, cables and supports should not trap debris around outlets or make routine cleaning unnecessarily difficult. The owner should know how inspections will be completed without dismantling half the system.
Confirm fragility, condition, replacement strategy and exclusion distances.
Protect gutters, outlets, overflows and access for cleaning.
Leave safe space to reach plant, joints and vulnerable interfaces.
Agree who removes, stores and reinstates panels if the roof needs intervention.
The warranty boundary must be settled before the first fixing
A solar installation may involve direct fixings, clamps, ballast, cable penetrations and new loads. Each can affect the roof manufacturer’s requirements or the contractor’s workmanship warranty.
The building owner should establish who approves the solar detail, who remains responsible if water enters around it and what evidence must be retained. The roof contractor and solar designer should not meet for the first time after a leak.
Our verdict: roof first, solar second
Do not install a twenty year asset above a five year problem
Gorton Market’s sequence is the sensible one. Understand and, where necessary, improve the roof before the panels limit access and duplicate future costs.
The solar opportunity should make owners more interested in roof condition, not less.
TCR carries out commercial roof surveys, refurbishment, replacement, overcladding and solar readiness reviews in Manchester and across the UK. We can assess the roofing information before panels are installed or help plan roof work around an existing proposal.
Relevant roofing and cladding routes
Frequently asked questions
How old can a roof be before solar panels are installed?
Age alone is not the deciding factor. The roof should be assessed for condition, remaining service life, structure, drainage, rooflights, access, fire and warranty compatibility with the intended solar life.
Can solar panels be installed over an overclad roof?
Potentially, but the overcladding and solar systems need coordinated structural, fixing, weathering, access and warranty design. The details should be agreed before either package is installed.
Does TCR carry out solar roof readiness surveys in Manchester?
Yes. TCR carries out commercial roof surveys, refurbishment, replacement and solar readiness reviews in Manchester and nationally.
Official sources
- Manchester City Council: regeneration works at Gorton Market — Published 2 June 2026.
This is independent commentary on publicly available information. Total Cladding and Roofing Ltd is not claiming appointment to, endorsement by or involvement in the named development unless expressly stated elsewhere.
Planning commercial rooftop solar in Manchester or elsewhere in the UK?
Send TCR the roof type, age, available drawings, solar proposal, structural information and known defects. We can discuss the roof survey and enabling works needed before the array is fixed in place.
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View all TCR insightsThe article is general commercial and technical commentary, not a substitute for a project-specific survey, design, structural assessment or specification.
