Bury St Edmunds Roofers provides commercial roofing in Stowmarket, covering flat roof systems, EPDM rubber, built-up felt, single-ply membranes, and profiled metal roofing for warehouses, offices, and retail buildings.
We carry out commercial roofing for businesses across Stowmarket and the wider Suffolk area, working from our base in Bury St Edmunds. The work ranges from full re-roofing of flat or metal-clad commercial buildings to targeted repairs on systems that are otherwise sound. We also cover fascias, soffits, guttering, roofing carpentry, and roof lighting as part of complete commercial roofing projects.
Commercial roofing systems differ from domestic ones in their scale, loading requirements, and the demands placed on drainage and waterproofing. The systems we install include EPDM rubber membranes, built-up felt, single-ply membranes, and profiled steel or aluminium sheet for industrial and agricultural buildings. Each has its place depending on the building type, pitch, and budget.
Flat roofs account for the majority of commercial roofing in the UK. They are practical, cost-effective, and compatible with rooflights, extraction, and rooftop plant. Quality matters enormously in flat roofing because the consequences of failure are immediate and the source of a leak is not always obvious from inside the building.
EPDM rubber is now widely specified for commercial flat roofs because it is flexible, durable, and resistant to UV degradation. A correctly installed EPDM system can remain watertight for 30 years or more. Built-up felt with a mineral-faced cap sheet is a proven alternative for smaller roofs and extensions. Typical commercial flat roofing costs in the UK run from around £70-£120 per square metre for quality systems, with deck replacement and access adding to that where needed.
Profiled steel and aluminium sheet roofing is the standard for warehouses, distribution units, and agricultural buildings. Modern coated steel sheet carries a factory finish that resists corrosion without maintenance painting. Over time, the areas that deteriorate first are laps between sheets, fixings, ridge cappings, and rooflight seals - not the main sheet face. Re-sheeting or over-cladding can resolve all of these without the expense of full structural demolition.
Typical costs for metal re-sheeting run from around £50-£90 per square metre for the cladding itself, before scaffold, insulation upgrades, or structural repairs are factored in. If the existing purlins or rafters need attention, that work needs to happen before the new sheet goes on.
Commercial guttering handles far larger volumes of water than domestic systems, and oversized or undersized guttering causes problems at both extremes. Gutters that are too small overflow in heavy rain and drive water back under the eaves. Box gutters that are too large can be difficult to clean and can hold debris that causes ponding. We size and install commercial guttering to match the catchment area of the roof, not as an afterthought.
Fascia and soffit replacement on commercial premises is sometimes deferred because it looks cosmetic. In practice, failing fascias allow vermin access and allow moisture to track into the rafter feet, causing progressive timber decay that becomes a structural issue over time.
Understanding what the warning signs of commercial roof failure look like, and what causes each one, allows you to make better decisions about when to act and how urgently. The signs below are worth checking for at least twice a year, and after any period of severe weather.
Internal staining is the most obvious sign that water is entering through the roof, but the stain is rarely directly below the entry point. On a flat roof, water can travel several metres along the deck or through insulation before it finds a gap to drip through. A damp patch in the middle of a ceiling could indicate a leak at the parapet, an outlet, or a rooflight at some distance from the stain. Tracing the source accurately is one of the more demanding parts of commercial roof diagnosis.
The cause is usually a failed joint, a lifted flashing, or a split in the membrane surface. Flashings at abutments, upstands, and penetrations are the most frequent failure points on any flat roof because they are subject to differential movement between the membrane and the adjoining structure. On older felt roofs, the laps between felt sheets can open as the felt becomes brittle.
Blistering on a felt or EPDM surface indicates that moisture or air is trapped beneath the membrane. On felt roofs, this happens when the bonding between layers breaks down, often because moisture was present when the felt was laid or because water has tracked back under the edge. The blister itself may not be leaking yet, but it signals that the bond has failed and the membrane is vulnerable to splitting under foot traffic or frost.
Large blisters that are allowed to develop will eventually crack along the top. Water then enters directly through the crack. A blister caught early can sometimes be cut, dried out, and re-bonded. Left until it splits, the repair area is larger and more complex.
Some degree of temporary ponding after heavy rain is normal on a flat roof. Water that remains pooled 48 hours after rain stops points to a falls problem, a blocked or inadequate outlet, or a deck that has deflected over time. Persistent ponding accelerates the degradation of felt and membrane surfaces, promotes moss and algae growth, and increases the risk of water finding a way through under wind pressure.
The cause is almost always one of three things: the falls were laid incorrectly in the first place; the deck has sagged between joists due to age or overloading; or the outlet is partially or fully blocked. Each requires a different solution, which is why a proper inspection is needed before any remedial work is specified.
Flashings seal the junction between the roof membrane and vertical surfaces - walls, upstands, chimney stacks, and plant bases. They are typically lead, aluminium, or code-formed sheet metal, dressed down over the membrane and pointed into mortar or fixed with clips above.
Flashings fail for several reasons. Mortar pointing cracks and allows water behind the flashing. Lead fatigue causes the sheet to crack along a dressed fold after repeated thermal expansion and contraction. On older roofs, the flashing may have been bedded rather than fixed, and the bedding mortar shrinks over time. A lifted flashing is one of the highest-priority repairs on any commercial roof because it is a direct, open path for water, and the volume entering can be large in driven rain.
On profiled metal roofs, the ridge capping seals the apex between two opposing roof slopes. The capping is held with fixings that can corrode or work loose, and the foam filler strips that fill the profile gap below the capping compress and decay over time. When the filler strip degrades, wind-driven rain enters at the ridge and tracks down inside the sheet profile, appearing as a drip at the eaves or at a low-level fixing. The source looks like a general roof leak but is actually highly localised to the ridge.
Surface rust staining on coated steel sheet does not always mean the sheet is failing. It often originates from a corroding fixing, a cut edge that was not sealed at installation, or debris sitting in a lap. However, if the coating on the flat face of the sheet is breaking down, it warrants investigation. Once corrosion penetrates the core of a profiled sheet it progresses quickly, and a section of roof that looks repairable may need to be re-sheeted within a short period.
Commercial roof failures sometimes reveal underlying structural issues. Rafter spread, rotten wall plates, decayed fascia carriers, and deflected purlins are all problems that affect the roof's ability to carry a new membrane or sheet system. Carpentry work to address these issues is part of a complete re-roofing project, not a separate job to organise later. Installing a new membrane over a compromised deck or structure shortens the life of the new system significantly.
We cover Stowmarket and the surrounding parts of Suffolk from our base in Bury St Edmunds. If you have noticed any of the warning signs above, or if your commercial roof is approaching the end of its expected service life, call us to arrange a survey. We will inspect the roof, explain what we find, and give you a clear picture of what is needed and what it will cost.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
