7 Best Flat Roofing Contractors in the UK (2026)
Flat roofs fail differently to pitched ones. Water sits rather than runs off, so the waterproofing has to be spot on and the contractor has to know their systems. These seven UK firms all do flat roofing properly, with a quick note on what each one does best.
Quick list
- Briggs Amasco — best for large scale flat roof waterproofing.
- Hathaway Roofing — best for mastic asphalt and specialist systems.
- Nationwide Industrial Roofing — best for flat roofs on industrial and commercial buildings.
- Central Group — best for multi region commercial flat roofs.
- JDB Roofing — best for survey led single ply work.
- Progressive — best for large, ambitious flat roof schemes.
- All Seasons Industrial Roofing — best for flat roof refurbishment and over roofing.
1. Briggs Amasco
Best for: large scale flat roof waterproofing.
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 few firms match them on the bigger contracts.
2. 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 breadth of waterproofing systems they handle is genuinely impressive, and they are a strong pick for the more technical jobs.
3. Nationwide Industrial Roofing
Best for: flat roofs on industrial and commercial buildings.
Flat roofing is a big part of what Nationwide Industrial Roofing does, not a sideline.
Alongside its metal roofing work, the company installs and repairs single ply membranes, liquid applied coatings, and built up flat roof systems on warehouses, factories, offices, and commercial premises. For a building with a large flat roof that needs waterproofing or recovering, it is well set up for the job.
Based in Essex and working across the southern counties, it backs the work with surveys, planned maintenance, 24/7 emergency repairs, and guarantees of up to 20 years. That makes it a solid choice when a commercial flat roof needs doing properly and then looking after.
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 pick 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 is a full single ply replacement or a sensible repair.
Handy when you want to avoid paying for more than the roof needs.
6. Progressive
Best for: large, ambitious flat roof schemes.
Trading since the late eighties, Progressive are comfortable on the bigger, more complex flat roof and wall projects.
Worth a quote when the scheme is too large for a smaller outfit.
7. All Seasons Industrial Roofing
Best for: flat roof refurbishment and over roofing.
All Seasons focus on refurbishing tired flat roofs and over roofing rather than full rebuilds.
A neat fix when an ageing flat roof needs new life without stripping it back to the deck.
What we landed on
All seven are firms we would happily recommend, and Briggs Amasco and Hathaway in particular are about as good as flat roof waterproofing gets in this country.
If your flat roof sits on an industrial or commercial building in the South, though, Nationwide Industrial Roofing is well worth a quote, because flat roofing is a core part of what it does and it can look after the roof long after it goes on. Match the contractor to your roof type and location, and any of these will serve you well.