Norwich Roofers installs, repairs, and maintains commercial roofs for businesses in Attleborough and across Norfolk.
Call any time. Calls are answered day and night and passed straight to our roofers.
We work on commercial roofs across Norfolk, covering warehouses, retail units, schools, and office buildings in and around Attleborough and back to our Norwich base. The systems we install and repair include single-ply membranes, EPDM rubber, built-up felt, and metal sheet roofing. The right system depends on the building, the budget, and how long the roof needs to perform.
Commercial roofing is not a one-size-fits-all service. A small retail unit with a tired felt roof has very different needs from a large-span warehouse with box profile metal sheeting. We assess each roof on its own terms before recommending a course of action.
The technical side of commercial flat roofing centres on drainage, detailing, and the condition of the deck underneath the waterproofing layer. Falls need to be adequate to prevent ponding. Upstands at walls and parapets need to be taken to the correct height and properly terminated. Penetrations for pipes, cables, and plant need to be individually detailed and sealed.
Metal sheet roofs require attention to lap dimensions, fixings, ridge and eaves sealing, and the condition of the purlins below. A sheet roof that looks intact from a distance can still let water in at poorly sealed laps or corroded fixings, and the water can travel a long way before it becomes visible inside the building.
Built-up felt systems are still found on older commercial buildings. Their condition depends on the number of layers, the quality of the original installation, and how well the falls and drainage were designed. Single-ply membrane systems are now the most widely specified new-build flat roof in commercial construction, partly because they are lighter and faster to install than built-up systems, and partly because the materials themselves perform well over a long service life when correctly installed.
This is the question that most business owners and property managers face when a commercial roof starts causing problems. The answer matters because the two options have very different costs and very different implications for how long you will have a watertight building without further expenditure.
There is no universal rule. The right answer depends on the age of the roof, the extent of the damage, the underlying cause of the failure, and what you plan to do with the building over the next ten to fifteen years.
Repair makes sense when the damage is genuinely localised and the rest of the roof is in serviceable condition. A single split in a felt lap, a failed seal around a pipe penetration, or a section of lifted membrane at an upstand are all problems that can be fixed without replacing the whole roof - provided the surrounding material is sound and the deck underneath is dry and undamaged.
The key test is this: is the failure in one place, or is it symptomatic of a roof that is nearing the end of its useful life? A roof that has been repaired in three different places in two years is almost certainly telling you that wider deterioration is under way. Patching individual failures while the rest of the roof continues to degrade is an expensive way to manage a problem that will eventually require full replacement anyway.
Repair is also appropriate when a roof is relatively young and the damage has a clear, single cause - storm damage, an impact from falling debris, or damage caused during building works. In those situations, targeted repair restores the roof to its former condition without the cost of replacement.
Replacement becomes the more cost-effective choice when any of the following apply:
A new roof on a commercial building is a capital expenditure, and the timing of that expenditure matters to any business. But deferring a necessary replacement through repeated patching usually costs more in the end, and it carries the additional risk of internal damage to the building if a serious failure occurs.
One option that sits between patch repair and full replacement is overlaying - installing a new membrane over the existing roof surface rather than stripping back to the deck. This can be a legitimate approach when the existing surface is reasonably sound and flat, the deck is dry, and the additional weight is within the building's structural tolerance.
Overlaying is faster and less disruptive than a full strip and re-roof, and it avoids the disposal costs associated with stripping old material. However, it should only be considered after the existing roof has been properly assessed. If there is moisture trapped within the existing build-up, overlaying locks that moisture in and can cause long-term deterioration of the deck. A contractor recommending overlay without having assessed the substrate condition is not giving you reliable advice.
The repair-versus-replace decision should never be made from the ground or from a quick look at the visible surface. A proper commercial roof survey involves getting onto the roof, checking the drainage outlets and upstand details, probing suspect areas, and where possible checking for moisture within the build-up using either electronic or thermal methods.
A survey that identifies one genuinely isolated problem is good news - it means repair is the right call. A survey that finds widespread surface cracking, multiple damp patches, soft spots in the deck, or failed upstand terminations in several locations is pointing towards replacement. Either way, the survey gives you the information you need to make a decision based on facts rather than hope.
Ask any contractor you are considering to put their survey findings in writing, with a clear recommendation and the reasoning behind it. A written survey report protects you if there is a dispute later, and it helps you compare the advice you receive from different contractors on a like-for-like basis.
Commercial flat roof repairs for localised problems typically start from a few hundred pounds for minor seal work and can reach several thousand for larger section replacements. The cost depends on access, the extent of the damaged area, and the material system involved.
Full commercial flat roof replacement costs depend on the specification and the insulation included, as well as the specific building, the access conditions, and whether structural deck work is required.
Metal sheet roof replacement is priced differently, and costs vary with the profile, the condition of the purlins, and the extent of the roof. Get a site survey and a written quote before making any budget assumptions.
Whether the decision is repair or replacement, work on a live business premises needs to be planned to minimise the impact on your operations. Roofing work can be noisy, and some operations - stripping old felt, cutting metal sheet - are particularly so.
A well-organised contractor will discuss the programme with you before work starts, identify which operations are most disruptive, and plan the sequence of work to reduce the impact on your staff and customers. If your building is occupied throughout the works, the protection of the interior from water ingress during the re-roof needs to be part of the plan, not an afterthought.
Ask any contractor to walk you through how they intend to manage this before you agree to the work. The answer will tell you a lot about how the job will be run.
We cover commercial roofing projects in Attleborough and throughout the wider Norfolk area, including work in and around Norwich and neighbouring towns. If you are dealing with a roof that is leaking, showing signs of deterioration, or simply due for review, call us to arrange a survey. We will give you a clear assessment of whether repair or replacement is the right call for your building, and a written quote for whichever route makes sense.
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Call any time. Calls are answered day and night and passed straight to our roofers.
