Two roofers in harnesses inspecting standing-seam metal sheets on a large industrial unit roof

Commercial and industrial roofing

Vetted contractors for industrial units, offices, schools and retail: new roofs, refurbishment and planned maintenance.

Quick answer: commercial roofing covers the flat, metal and membrane roofs on business premises: industrial units, warehouses, offices, schools and retail. Every project is priced from a measured survey, because area, system, access and whether the building stays occupied all move the number. Request quotes to get a surveyed price.

Commercial roofing contractors install, refurbish and maintain the roofs on business premises, where the priorities are different from a house: bigger areas, stricter health and safety, insurance and warranty conditions, and the hard requirement that the business underneath keeps trading while the work happens. The trade-offs are different too, which is why commercial work is specified from a survey rather than a price list.

Buildings we cover

Industrial units and warehouses: metal profile and built-up roofs, rooflight replacement, gutter refurbishment and cut-edge corrosion treatment.
Offices: flat roof refurbishment and replacement, often phased to keep floors below occupied and dry.
Schools and public buildings: works planned around term dates, with safeguarding checks and flame-free systems where required.
Retail and leisure: out-of-hours working, protected access routes and minimal disruption to trading.

Commercial roofing systems

Single-ply membranes: the modern default for large flat roofs. Fast to lay over big areas, flame-free options available, and clean detailing around plant and outlets. See our flat roofing service for the systems in detail.
Built-up felt: the traditional multi-layer system, still widely used on smaller flat roofs and repairs to older stock.
Metal profile sheeting: the standard covering on industrial units, replaced or over-clad, with matching flashings, rooflights and gutters.
Liquid-applied systems: cold-applied waterproofing that excels on complex details and overlays, often the most economical way to extend the life of a tired but sound roof.

Which system is right depends on the deck, the roof's use, the required design life and whether the building can tolerate hot works. A good contractor will survey first and specify second, not the other way round.

Planned maintenance: the cheapest roofing you will ever buy

Most large commercial roof failures start small: a blocked outlet, a split lap, a loose flashing. On a big roof nobody looks at, those small faults run for months and turn into soaked insulation, stained ceilings and stock damage. A planned maintenance agreement, typically inspections twice a year plus gutter clearance and minor repairs, costs a fraction of one serious leak and produces the documented history that insurers and warranty providers expect. Our roof inspection service covers condition surveys and drone reports for exactly this purpose.

Worth knowing: if your roof is tired but dry, ask contractors to price an overlay or liquid refurbishment alongside full replacement. On a sound deck it can defer the big spend by years, but insist on core samples first: sealing moisture into the build-up is the classic false economy.

What commercial roofing costs

There is no honest per-metre menu for commercial work, and you should be wary of anyone who quotes one sight unseen. Roof area, system, insulation spec, edge protection, access equipment and phasing around your operations all move the price, so projects are surveyed and quoted individually. The practical route: tell us about the building and compare itemised quotes from vetted commercial contractors.

Get your commercial roof surveyed and priced

Itemised quotes from vetted commercial roofing contractors, planned around your business staying open. Free, no obligation.

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Commercial roofing FAQs

Commercial roofing questions, answered

Commercial roofing is always priced from a survey, because the numbers turn on roof area, the system specified, access, and whether the building stays occupied during the work. Two units of the same size can price very differently. The reliable route is a measured survey and itemised quotes from two or three contractors, which you can arrange through our free quote service.

The four workhorses are single-ply membranes on large flat roofs, built-up felt on smaller flat roofs and older stock, metal profile sheeting on industrial units and warehouses, and liquid-applied systems for overlays and complex detailing. The right choice depends on the deck, the roof's use, the required lifespan and whether the building can close during works.

Often, yes. Liquid systems and single-ply overlays can go over a structurally sound existing roof, avoiding strip-off costs, disposal and business interruption. An overlay is only as good as what sits beneath it though, so a condition survey with core samples comes first: trapped moisture under a new overlay is an expensive mistake.

Usually not. Most commercial roofing is planned around the building staying in use: phased working areas, out-of-hours or holiday slots for schools, protected walkways and dust and fume control. Flame-free systems such as single-ply and cold-applied liquids exist partly so occupied buildings can be worked on safely.

Twice a year is the standard rhythm, ideally spring and autumn, plus a check after major storms. Regular inspection keeps outlets and gutters clear, catches failed details while they are still small repairs, and gives you the documented maintenance record that insurers and warranty providers increasingly expect. See our roof inspection service.