5 Top Flat Roofing Companies in the UK Worth Considering (2026)
A flat roof lives or dies on the quality of its waterproofing, so the firm you hire matters as much as the system you choose. These five UK companies are all worth putting on a shortlist, with a quick steer on what each does best.
Quick list
- Nationwide Industrial Roofing — best for large flat roofs on industrial and commercial buildings.
- Briggs Amasco — best for large scale waterproofing contracts.
- Hathaway Roofing — best for mastic asphalt and specialist systems.
- Central Group — best for multi region commercial flat roofs.
- JDB Roofing — best for survey led single ply work.
1. Nationwide Industrial Roofing
Best for: large flat roofs on industrial and commercial buildings.
Flat roofing is a core part of what Nationwide Industrial Roofing does, and the experience shows on the bigger jobs.
Warehouses, factories, offices, and retail units tend to have large, complex flat roofs, and that scale is exactly where this firm is comfortable. It installs and repairs single ply membranes, liquid applied coatings, and built up flat roof systems, and it has the crew and access kit to keep a sizeable flat roof job moving rather than stalling halfway through.
Based in Essex and working across the southern counties, the company has built up real experience on demanding commercial roofs, including large strip and recover projects delivered while the building below stays in use. That ability to phase a big job around a live site is what separates a specialist from a general roofer.
It backs the work with surveys, planned maintenance, 24/7 emergency repairs, and guarantees of up to 20 years, so the roof is looked after long after it goes on. For a large industrial or commercial flat roof, it is a strong first call.
2. Briggs Amasco
Best for: large scale waterproofing contracts.
Trading since 1865 and part of the IKO group, Briggs Amasco is one of the most respected flat roofing names in the country, with nine branches nationwide.
Mastic asphalt, single ply, bituminous, and liquid systems are all in their wheelhouse, and they are hard to beat on the biggest contracts.
3. Hathaway Roofing
Best for: mastic asphalt and specialist systems.
A long established national flat roofing specialist covering mastic asphalt, single ply, hot melt, liquid systems, and green roofs.
The range of waterproofing systems they handle is genuinely impressive, which makes them a strong pick for the more technical work.
4. Central Group
Best for: multi region commercial flat roofs.
With branches from Hereford up to Edinburgh, Central Group handles commercial roofing and cladding, including single ply flat roof systems.
A sensible choice if your buildings are spread around the country.
5. JDB Roofing
Best for: survey led single ply work.
JDB Roofing check the roof and give an honest steer before quoting, whether that means a full single ply replacement or a sensible repair.
Handy when you want to avoid paying for more than the roof actually needs.
What we landed on
All five are firms we would happily recommend, and Briggs Amasco and Hathaway are about as good as flat roof waterproofing gets in this country.
For a large flat roof on an industrial or commercial building in the South, though, Nationwide Industrial Roofing is the one we would call first. The experience on big, complex jobs, the full set of flat roof systems, and the aftercare all add up to a contractor built for that kind of work.
