Dereham Roofers carries out commercial roofing work for businesses in North Tuddenham and the surrounding Norfolk villages, covering flat roof replacement, profile metal sheeting, cladding, guttering and ongoing maintenance.
Whether you operate a warehouse, an industrial unit, a retail premises or an office building in North Tuddenham, the roof above it is one of the most important parts of the structure. A commercial roof that fails costs far more in lost stock, damaged interiors and emergency call-outs than any planned programme of work would have done.
We carry out the full range of commercial roofing services for businesses in North Tuddenham and across Norfolk, working around your operating hours to keep disruption to a minimum. That means early starts, weekend access where needed, and a clear programme of work agreed before we begin.
Commercial buildings use a much wider range of roofing systems than domestic properties, and the right choice depends on the building's use, its structure and the existing system already in place.
Commercial roofing is not the same as domestic roofing. The scale is larger, the access is more involved, and the consequences of getting it wrong are more serious for the people running the business below. We use scaffold towers, mobile elevated work platforms and fixed scaffold depending on the size and height of the structure.
Before any work starts we carry out a survey of the existing roof to assess the deck, the insulation if present, the drainage falls and the condition of all penetrations and flashings. This tells us whether a full replacement is necessary or whether targeted repairs will extend the roof's life for several more years at lower cost.
We work across Dereham, North Tuddenham and the wider Norfolk area.
Flat roofs on commercial buildings fail for a handful of recurring reasons. Blocked or undersized outlets cause water to pond on the surface, which accelerates the breakdown of felt membranes and, on metal roofs, encourages corrosion at the low points. A common problem is that original drainage falls were designed for one outlet size but subsequent blockages have never been cleared properly, so ponding becomes the normal state of the roof rather than a temporary one.
On profile metal roofs, the fixings are often the first thing to fail. The rubber washers that seal the screw heads compress and crack over time, allowing water to track down into the building along the fixing line. This is a relatively inexpensive repair if caught early, but if left it leads to rust streaks on the sheeting and eventually to penetration of the structural purlins below.
Cladding panels on industrial units frequently suffer from failing sealant at horizontal joints. Water sits in those joints during rain and slowly degrades the mastic. Once the seal is gone, water gets behind the panel and the problem is hidden until it shows up as damp on the interior wall. Replacing the sealant before that point happens is straightforward; dealing with the consequences of not doing so is not.
Parapet walls and upstands on flat roofs are another persistent weak point. The flashing at the junction between the roof membrane and the vertical face needs to be dressed properly and held in place with a code 4 or code 5 lead flashing or an appropriate aluminium trim. Where this has been done cheaply or has simply aged, water gets behind the upstand and into the wall below.
This is where the difference between a well-run commercial property and one that keeps generating emergency repair bills is most clearly seen. A commercial roof that receives straightforward, regular attention typically lasts significantly longer than one that is ignored until something goes wrong. The maintenance itself is not complicated or expensive - the value is in doing it consistently.
A proper inspection of a commercial roof should be carried out at least once a year, with an additional check after any period of severe weather. The key things to look at are outlets and drains (cleared and flowing freely), the surface of any felt or membrane (no splits, blisters or open laps), fixings on metal sheets (no lifted or missing fasteners, no rust streaks), flashings and upstand edges (tight to the structure, no open joints), and the gutters and downpipes (no blockages, no sagging sections, no joint failures).
None of this requires specialist equipment. What it requires is someone who knows what they are looking at and who is keeping a record so that small changes are spotted before they become large ones. If you can walk the roof safely and you know the system, you can do parts of this yourself. If the roof is high or the surface is fragile, get a roofer to do it properly rather than risk a fall or put footprints through an ageing membrane.
Blocked outlets are the single most common cause of avoidable water damage on flat commercial roofs. Leaves, moss, wind-blown debris and bird nesting material all find their way into outlets, and on a large flat roof there may be only two or three outlets draining the entire surface. A blockage that causes water to pond for even a few days puts enormous pressure on the membrane, particularly at the edges where it is lapped or bonded.
Commercial gutters should be cleared at least once a year in most locations, and twice a year if the building is close to trees. Box-section steel gutters on industrial buildings hold large volumes of water when blocked and can pull away from their brackets under that weight, causing damage to the fascia and the wall below. The cost of clearing a gutter run is trivial compared with replacing a section of wall cladding that has been soaked for a season.
Moss growth on flat felt roofs is more than a cosmetic issue. The roots of moss physically break down the surface layer of felt and create channels for water to follow. Algae on EPDM rubber membranes does not cause the same mechanical damage but indicates the surface is retaining moisture longer than it should, which is worth investigating.
A biocide treatment applied after clearing will suppress regrowth for a period - typically one to three seasons depending on the product and the location. This is best done as part of an annual maintenance visit rather than as a separate job, because the cost of a contractor attending site is much the same whether they treat the moss at the same time or not.
The mindset shift that saves businesses real money is treating a small repair as insurance rather than an avoidable cost. A 300mm split in a felt lap that costs a relatively modest sum to repair with a torch-on patch will, if left, allow water to track under the felt and reach the decking below. Once the deck is wet the repair cost multiplies because the deck itself may need to come up. If the deck is built-up insulation board, a wet board loses most of its insulation value even after it dries out, and a large area may need replacing entirely.
The same principle applies to the rubber gaskets on metal sheet fixings. A box of replacement fixings and an hour's work to replace the failing ones costs very little. Allowing water to enter the purlin below the sheeting, which then rusts and loses structural capacity, is an entirely different scale of problem.
If you manage or own a commercial property, keeping a written record of every inspection, repair and gutter clear is genuinely useful. It tells you whether the same leak is recurring (which means the repair has not addressed the root cause), it gives you a clear picture of the roof's age and condition, and it is useful evidence if you ever need to make an insurance claim or sell the building. A log does not need to be complicated - a dated entry, a description of what was found and what was done is enough.
Ask your roofer to provide a brief written note after each visit. A professional doing a planned maintenance job should have no objection to this.
Before committing to any ongoing maintenance arrangement, it is worth asking a few clear questions. How often will the roof be inspected, and what exactly will be checked on each visit? Will the cost of minor remedial work - re-bedding a flashing, clearing an outlet - be included, or will it be charged separately? Is there a written report after each visit? And what will trigger a recommendation for a larger repair or replacement?
A well-structured maintenance arrangement gives you predictable costs, a longer life from your existing roof covering, and far fewer emergency situations. It also means a roofer who knows your roof well is the one who will spot a developing problem earliest.
Commercial roofing costs in Norfolk vary considerably depending on the system, the size of the building and the condition of the existing structure. A straightforward EPDM flat roof replacement on a small commercial building typically falls in the range of £70 to £120 per square metre, depending on specification and access. Profile metal sheet replacement on an industrial building is generally in the range of £40 to £80 per square metre for the sheeting and fixings, though complex rooflines, fragile existing sheets and difficult access all add to this. These figures are for the roofing work itself and do not include scaffold erection, which is quoted separately for commercial projects.
Planned maintenance programmes are usually costed on an annual basis once the roofer has seen the building. A simple once-yearly inspection and gutter clear on a small industrial unit is a modest cost relative to the damage a neglected roof can cause.
Commercial guttering is often overlooked until it fails visibly, either by overflowing in heavy rain or by pulling away from the building. On older industrial buildings, cast iron ogee gutters may have been in place for decades and are likely to have cracked joints, failed brackets and rust perforations that make them ineffective. The practical replacement is usually a heavy-section aluminium or steel profile that runs to the same outlets.
On modern industrial sheds, box-section steel gutters are standard. The most common failure point is the joint sealant between gutter lengths, which dries and cracks after several years. Re-sealing joints before they open fully is straightforward; dealing with the damp wall below a gutter that has been leaking for a season is considerably less so.
If your commercial roof has not been inspected in the last twelve months, or if you have noticed any signs of water ingress, ponding, rust staining or sagging gutters, call us to arrange a survey. We cover North Tuddenham, Dereham, Norwich and the broader Norfolk area, and we will give you a straight assessment of what the roof needs and what the work will cost before anything is agreed.
Call Dereham Roofers to book a roof survey for your commercial property.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
