Mastic asphalt
- Flat roof
- 30–50 years
- £££ Higher
Flat roofing · Flat roof system
Layered bitumen felt with a mineral finish. Tried, tested and cost-effective.
About this roof covering
Modern reinforced bitumen membranes are torched on in layers, finished with a mineral cap sheet that protects against UV. Far better than the old felt roofs, and a cost-effective choice.
- Typical minimum pitch
- Flat roofs (laid to a fall)
- Typical lifespan
- 20–30 years
- Weight
- Light
- Relative cost
- £ Budget
- Style
- Traditional · Flat roof system
Colours
- Grey
- Green
- Black
Good for
Pros
- Cost-effective
- Multi-layer protection
- Easy to repair
Things to consider
- Shorter life than EPDM or GRP
- Laid with a flame, so needs care around buildings
Where you'll see it: Garages, extensions and commercial flat roofs.
Figures are typical guides and vary by manufacturer and roof. We’ll confirm what suits your roof at a free inspection. The picture is an illustration.
Compare
GRP fibreglass
- Flat roof
- 25–30+ years
- ££ Mid-range
EPDM rubber membrane
- Flat roof
- 30–50 years
- ££ Mid-range
Liquid rubber coating
- Flat roof
- 15–25 years
- ££ Mid-range
Book a free inspection, or send a few photos for a free online estimate. No deposit, and you only pay when the job is done.
- No depositPay on completion, once you’re happy
- Free inspectionWith a fixed, written quote
- 24/7 call-outsFor leaks and storm damage