Diss Roofers provides commercial roofing services across Harleston and the surrounding area, covering flat roof replacement, single-ply membranes and profiled steel sheet systems on business and industrial premises.
Call any time. Calls are answered day and night and passed straight to our roofers.
When a commercial roof reaches the end of its life or needs a major repair, the choice of covering material is as important as who you hire to install it. The right system depends on the roof's pitch, the size of the area, how the building is used, and what budget is available. This page lays out the main options honestly, with real advantages and real drawbacks for each.
Traditional built-up felt - multiple layers of bitumen-impregnated felt bonded together with hot or cold bitumen - has been used on commercial flat roofs for decades. It is still one of the most widely installed systems in the UK because the materials are familiar, widely available, and installers are easy to find.
EPDM (ethylene propylene diene monomer) is a vulcanised rubber membrane supplied in large rolls and bonded or mechanically fixed to the roof deck. It has grown in popularity on commercial roofs because of its flexibility and the fact that it handles thermal movement well - important on a large roof area that heats and cools significantly through the year.
Profiled steel (also called metal sheet or standing seam, depending on the profile) is the standard covering for industrial units, warehouses and agricultural buildings. It is a pitched or low-pitch system - typically installed at a minimum pitch of around 4-6 degrees depending on the profile - and comes in a range of rib depths and coatings.
Offices, retail premises and older commercial buildings sometimes have pitched roofs finished in natural slate or concrete/clay tile. Natural slate is a premium material - quarried slate from Wales, Spain or Portugal lasts 80-100 years in good conditions. It costs more than any manufactured alternative but, correctly laid on sound battens and underlay, requires minimal maintenance over its life.
Concrete and clay tiles are a more economical pitched roof option, at roughly £40-£80 per square metre installed, and are a practical choice where the roof pitch suits them and budget is a consideration.
When replacing a commercial flat roof, the insulation specification matters almost as much as the covering. Current building regulations require meaningful thermal performance even on replacement roofs where practicable. The insulation can sit below the membrane (warm roof), above it (inverted roof), or within the structure (cold roof - now rarely used on new work). A warm roof build-up is the standard approach: insulation boards sit on top of the deck and the waterproofing membrane goes over them. This keeps the deck warm and dry, reducing the risk of condensation within the structure.
On any flat roof system, a repair makes sense when the failure is isolated and the rest of the covering is structurally sound. If a felt roof is more than 15-20 years old and showing widespread blistering, cracking at upstands or saturated insulation, a patch repair is likely to buy only another year or two before the next problem appears. In that situation, a full replacement - with a system chosen to suit the building - gives a better return on the money spent.
For the pitched steel sheet roofs on industrial units, localised fastener replacement and sealant work is viable when the sheets themselves are still in good condition. Once sheets are corroding through or the liner has failed, a full re-sheet is more cost-effective than patching.
We work on commercial premises across Harleston and the wider area around Diss and South Norfolk. If you are weighing up which system suits your building, call us and we will survey the roof and give you a clear breakdown of your options and realistic costs before you make any decision.
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Call any time. Calls are answered day and night and passed straight to our roofers.
