Brandon Roofers provides commercial roofing in Littleport and nearby, working on warehouses, industrial units, retail premises and office buildings.
Commercial roofing covers a wide range of building types and systems. On flat-roofed industrial and retail buildings the most common systems are built-up mineral felt, single-ply membranes (TPO or PVC) and EPDM rubber. Pitched commercial roofs - particularly on warehouses and agricultural buildings - often use profiled steel sheeting or fibre cement. Each system has different maintenance needs, different failure modes and a different expected lifespan.
A full flat roof replacement on a commercial building involves stripping the existing membrane back to the deck, assessing and replacing any damaged or waterlogged insulation boards, re-laying drainage falls if necessary and then installing the new system with properly formed upstands, flashings and outlet details. Cutting corners on any of those stages - particularly falls and flashings - produces the same problems the old roof had, just with newer materials on top.
Where access is restricted or the building is occupied during the works, we can schedule the noisier elements of stripping and installation outside trading hours.
Flat roofs on commercial buildings fail at predictable points. The most common problem areas are:
Many of these failures are detectable long before they allow water into the building - but only if someone actually gets onto the roof and looks. A ground-level inspection will not find a flashing that has lifted two centimetres away from a parapet wall, and by the time a water stain appears on the ceiling below, the damage to insulation boards and possibly the deck itself is already done.
Built-up mineral felt replacement runs from around £45 to £75 per square metre for a commercial flat roof, depending on the number of layers, the insulation specification and the complexity of the detailing. Single-ply systems (TPO, PVC) typically cost £70 to £120 per square metre installed. EPDM rubber sits in a similar range. On a 500 square metre industrial roof, the material and labour cost alone - before access equipment - might be £35,000 to £60,000 for a quality single-ply installation.
Scaffolding or a mobile elevated work platform (MEWP) is often required for safe access on a commercial building. This can add £3,000 to £10,000 or more to the project cost depending on building height and footprint. Any quote that does not address access costs needs to be questioned.
For targeted repairs rather than full replacement, the cost depends on what needs doing. Flashing repairs on a commercial building might run to £300 to £800; a section of failed felt or single-ply membrane replaced over a specific leak area might cost £500 to £1,500. Always ask what the repair includes and whether the surrounding membrane has been checked for related deterioration.
Discovering a leak on a commercial building - whether it is a drip through a ceiling tile or a wet patch on a warehouse floor - puts building managers under immediate pressure. There is a gap between the moment you spot the problem and the moment a roofer can get on site and fix it. How you handle that gap matters.
The following is practical advice for the period between identifying a commercial roof leak and getting professional help on site.
Your first priority is the contents and structure below the leak, not the roof itself. Move stock, equipment or vehicles away from the drip area immediately - water that has soaked through a flat roof membrane and accumulated in insulation boards can suddenly release in quantity if a saturated board shifts or if a ceiling tile gives way. Do not stand directly beneath the leak to investigate it.
Use buckets and place a board over the top of each one if the drip is fast - a bucket filled and overflowing unnoticed overnight does as much damage as the original leak. On warehouse floors where stock is stored on racking, check whether water is tracking along a beam or roof sheet before assuming the drip point is directly below the entry point. Water on a commercial roof will travel horizontally for several metres inside the deck or ceiling void before finding a way down.
Take photographs and a short video of the water entry point, the staining pattern on the ceiling or wall, and any damage to stock or fittings. Note the time and date. If you have tenants in the building, ask them to do the same in their area. This documentation is important for insurance purposes and it helps a roofer understand what they are dealing with before they get on the roof - a staining pattern can indicate where water entered the membrane even when the visible drip point is some distance away.
If there are multiple drip points or a large stained area on the ceiling, do not assume there is only one entry point on the roof. Wide staining on a flat roof building often means the insulation is saturated across a large area and water is tracking in several directions internally.
This section is important. The natural instinct when a roof is leaking is to do something to stop it, but a number of common DIY responses make the eventual professional repair more difficult, more expensive or both.
Do not apply roof sealant or mastic to the membrane from ground level or without knowing exactly where the entry point is. Sealant applied to the wrong area does nothing to stop the leak and covers the surface so that a roofer cannot see the condition of the membrane underneath. If the sealant is incompatible with the existing system - a common problem with mineral felt and solvent-based products - it can damage the cap sheet surface.
Do not attempt to patch single-ply or EPDM membrane yourself with self-adhesive patches unless you have been shown how. Single-ply membranes require surface preparation before any patch will bond correctly. A patch applied to a contaminated or wet surface will lift within days, and the membrane underneath will have been disturbed in a way that makes a permanent weld repair harder.
Do not use a pressure washer to clear a blocked outlet in wet conditions or when the roof is already leaking. Forcing water under pressure across a compromised membrane risks opening splits further. Clear surface debris by hand and lift any outlet grating carefully.
Do not attempt to access the roof yourself if you do not have appropriate equipment and training. Commercial flat roofs often have no edge protection and the surface - particularly mineral felt on a warm day or EPDM when wet - can be slippery. A fall from a commercial roof is serious. Wait for a roofer who has the access equipment and training to work safely at height.
Do not seal up rooflights, ventilation outlets or expansion joints with tape or expanding foam in an attempt to stop water getting through. These features exist for a reason and blocking them creates new problems while rarely fixing the one you can see.
There is a short list of things that are genuinely useful to do before a roofer arrives.
Beyond that, the best thing you can do is have good documentation ready and a clear description of when the leak was first noticed, what the weather was like at that point, and whether it has appeared before.
When you call Brandon Roofers - or any roofer - about a commercial roof leak, a few specific questions will help you get a useful response rather than a vague promise to take a look.
For commercial roofing in Littleport, call Brandon Roofers to arrange a roof survey and talk through what needs doing.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
