Commercial roofing for offices, warehouses, retail units and industrial premises across North Walsham and the surrounding area. We work on flat roofs, pitched roofs, cladding and leadwork to keep your building watertight and your business running.
Photo from one of our recent jobs
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A commercial roof failure costs far more than a repair bill. Leaks lead to damaged stock, electrical hazards, ceiling collapses and business interruption. Whether you own or manage an office block, a warehouse, a retail unit, a workshop or a farm building, keeping the roof in sound condition is one of the most important pieces of maintenance you can do. We carry out commercial roofing work across North Walsham and the wider North Norfolk area, covering everything from emergency leak repairs to full roof replacements.
Commercial roofs vary enormously. A large-span industrial unit might have a shallow-pitch steel-sheet roof with box guttering. A Victorian town-centre terrace converted to offices might have a slate or clay-tile pitched roof with lead flashings around the chimney stacks. A single-storey retail extension might have a felt or EPDM rubber flat roof. Each system has its own failure points, its own maintenance requirements and its own correct repair method. Getting the specification right at the outset saves money over the life of the building.
Most commercial properties in and around North Walsham fall into one of a handful of roof categories, and the right approach depends heavily on which one you have.
A common problem on large commercial flat roofs is ponding, where inadequate falls allow water to sit for days after rainfall. This adds weight, promotes algae growth and breaks down the felt or membrane surface faster than a correctly drained roof.
On profiled metal roofs, a common issue is over-tightened or corroded fixings. When a screw pulls through the sheet or the neoprene washer perishes, the hole lets water in but the leak often appears well away from the source, making it hard to trace without a proper inspection. Rooflights on industrial buildings are another frequent source of leaks, especially where the flashing has been applied with sealant rather than properly overlapped.
On pitched commercial roofs, the ridge line is often the first to fail. Mortar-bedded ridge tiles rely on the mortar bond staying intact. Once moisture gets behind them, frost repeatedly freezes and thaws the mortar, breaking it away from the tile. Loose ridge tiles become a safety hazard as well as a water entry point. Mechanically fixed dry-ridge systems remove this vulnerability entirely and do not require re-pointing over time.
Lead flashings around parapet walls are another persistent weak point. Parapet walls trap water on both faces and the flashing at the junction between the wall and the flat roof surface must be lapped and dressed correctly into the masonry. Builders or decorators sometimes apply silicone or mastic as a short-term fix, which delays but does not solve the underlying problem. When we strip back failed flashings on commercial jobs, the roof deck underneath is often wetter than the building's occupants realise.
A proper commercial roof inspection goes beyond walking the surface and looking for obvious damage. We check the condition of the deck or substrate where accessible, test for ponding by observing fall directions, check all upstands and flashings, inspect any penetrations such as pipes, vents and rooflights, and examine internal ceilings for staining patterns that reveal where water has been tracking.
On larger roofs, access is a significant part of the job. Scaffolding, mobile elevated work platforms (MEWPs) or fixed-anchor rope access systems may be needed depending on the building. We agree the access method with you before work starts so there are no surprises about plant on your car park or disruption to business operations.
After inspecting the roof we will explain what we found, what repair or replacement options exist and what each involves in terms of disruption and cost. For straightforward repairs, it is reasonable to ask for a clear price on the spot. For larger re-roofing projects we provide a written specification so you know exactly what materials will be used and what work will be carried out.
Commercial roofing costs vary significantly depending on roof area, access requirements, material choice and whether the deck needs replacing. As a general guide, felt flat roof replacement on a commercial building in the UK typically runs from around £45 to £75 per square metre for a quality built-up felt system, while EPDM rubber systems typically cost £60 to £90 per square metre installed. These figures are for the roofing membrane and associated upstands and flashings; scaffold or access platform hire is additional and depends on building height.
Profiled metal sheet replacement varies widely with sheet type, thickness and profile. Replacing worn or damaged sheets on an agricultural or industrial roof commonly costs £30 to £60 per square metre for the sheeting itself, plus fixings, laps and any new rooflights. A full re-roof of a large commercial unit will obviously carry a larger total, but catching individual failed sheets early costs considerably less than waiting until the deck beneath has rotted or corroded.
Pitched roof repairs such as ridge re-pointing or a dry-ridge installation, valley replacement or localised slate re-fixing are normally priced per job rather than per square metre. A full ridge re-mortar and re-bed on a medium-sized commercial property might cost £400 to £900 depending on length and access. Lead flashing replacement around a parapet or chimney stack on a commercial building is typically £300 to £800 per section.
All prices above are indicative UK ranges. The exact cost for your building in North Walsham depends on what we find when we inspect it.
One of the key differences between commercial and domestic roofing is that a business cannot simply move out while work is carried out. We plan commercial jobs to minimise disruption, working in sections where practical, scheduling noisy work outside core business hours where agreed, and keeping access points and emergency exits clear at all times.
For leak-repair work, speed matters. A leak in an active warehouse, shop or office can cause damage that runs well beyond the cost of the roofing job itself. Active leaks should be treated as priority work, with the roof inspected quickly to assess what is needed and at least a temporary fix put in place while materials are ordered for a full repair.
For planned re-roofing, particularly on larger commercial buildings, we work to an agreed programme. This means you know in advance which sections of roof will be open at any one time, what weather conditions could cause delays and how we will protect the open deck if rain falls before the new system is finished.
A commercial roof that is inspected and maintained regularly costs less to keep watertight than one that is left alone until a leak becomes obvious. Small problems, a lifted flashing, a handful of loose screws, a blocked outlet, found during an annual inspection, can be fixed in an hour. Left for two or three years they become larger, more expensive jobs.
For businesses in North Walsham and surrounding towns and villages in North Norfolk, an annual roof inspection before winter makes sense. We check that all outlets and gutters are clear, that no sheets or tiles have moved over the summer, that flashings are still properly dressed and that sealants applied in previous years are still sound. This kind of preventive maintenance is particularly valuable on large flat roofs where a blocked outlet can cause significant ponding over a winter.
Commercial roofing involves working at height on occupied buildings, coordinating access with business operations and specifying the right materials for potentially large roof areas. Not every roofer who handles domestic work takes on commercial projects. When you are getting quotes for commercial work, it is worth asking specifically about experience with your roof type and access method.
Ask to see examples of similar commercial jobs, ask who will actually be on-site carrying out the work, and make sure the scope of work in any quote includes all associated items: stripping and disposing of old materials, new decking boards if required, upstands, flashings, trims and outlets, not just the membrane or sheet material itself. A low price that excludes half the scope is not a saving.
Check that the roofer you use is clear on what material they are installing and can tell you what the manufacturer recommends for that system. For EPDM, for example, the method of bonding at the seams and upstands matters as much as the membrane itself. For profiled metal, sheet thickness, coating type and fixing specification all affect how long the roof will perform.
We are based in North Walsham and carry out commercial roofing work throughout the town and in nearby towns and villages across North Norfolk. The area has a mix of agricultural buildings, converted farm offices, coastal business premises, town-centre commercial property and light industrial units, each with its own particular roofing demands. If you are not sure whether your premises falls within our working area, call us and we will tell you directly.
If your commercial roof is leaking, overdue an inspection or you are planning a re-roof, call us to arrange a site visit. We will inspect the roof, explain what we find and give you a clear price for the work required. There is no benefit in waiting with a commercial roof; water in a building is always easier and cheaper to deal with before it has had time to spread.
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Call any time. Calls are answered day and night and passed straight to our roofers.
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