- Price per m²
- £83–£147
- Typical life
- 30–60 years
- Manufacturer guarantees
- 15-year material, up to 25-year system guarantees
- 30 m² roof
- £3,400–£6,100
Derbyshire at a glance
- Largest towns
- Derby, Chesterfield, Long Eaton, Ilkeston
- Postcode areas
- DE, NG, S, SK
- Building control
- Derby City Council, Chesterfield Borough Council, Erewash Borough Council and 4 other councils
- Neighbouring areas
- Nottinghamshire · Staffordshire · South Yorkshire · Leicestershire
- Guide price region
- East Midlands (−2% on West Midlands rates)
How much does mastic asphalt roofing cost in Derbyshire?
Guide prices including VAT at East Midlands rates. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Mastic asphalt roof (30 m²), scaffold | £3,400–£6,100 |
| Localised patch repair | £150–£490 |
| Single garage (18 m²), EPDM rubber | £1,550–£2,750 |
| Extension (20 m²), EPDM, new deck + insulation | £2,750–£4,800 |
Which flat roofs are common in Derbyshire?
Flat roofs in Derbyshire sit on bungalows with flat-roofed side extensions and dormers, 1960s and 1970s link-detached houses with flat-roofed garages and porches and newer estates where the first extension roofs are now being replaced. The East Midlands is drier than the west of Britain, so most flat roofs here fail through age, UV and poor detailing at upstands rather than sheer rainfall. Approximate 1991–2020 regional averages based on Met Office data.
Building regulations in England
Replacing more than half of a roof over a heated room usually counts as renovating a thermal element, so it is insulated to current standards and notified to building control. Renovated roofs over heated rooms are insulated to around 0.16 W/m²K where that's feasible, and new extension roofs are built to 0.15 W/m²K. In Derbyshire the application goes to Derby City Council, Chesterfield Borough Council, Erewash Borough Council and 4 other councils. More on the rules.
How long does mastic asphalt last, and what guarantees are available?
Mastic asphalt is one of the longest-lasting flat roof systems, typically giving 30 to 60 years with good specification and maintenance. Many older asphalt roofs are still watertight decades after they were laid.
Age does show eventually. Common signs include crazing and cracking from sun exposure, blisters where moisture has been trapped beneath, splits at skirtings where the building has moved, and ponding where the deck has settled. Regular maintenance, such as renewing solar reflective paint, keeping outlets clear and repairing cracks early, makes a real difference to life.
Material and system guarantees are available on some specified asphalt systems, and we register them for you where the system allows. Every re-roof carries our written workmanship guarantee, with the length set out in the quote, and insurance-backed options can be discussed. Our lifespan guide compares asphalt with the other systems.
Is mastic asphalt still a good choice, or should I switch systems?
Mastic asphalt is still a good choice on concrete roofs, heritage and older buildings, and roofs that carry heavy foot traffic or plant. On lightweight timber roofs, garages and most modern extensions, another system is usually more practical.
Benefits: very long typical life; jointless and fully bonded; takes foot traffic well, especially with a paving finish; matches the original roof on many older buildings; local repairs blend into the existing surface.
Drawbacks: heavy, so the structure must be able to carry it; higher cost; needs specialist labour and hot works with molten material; can crack in cold if not well maintained, and softens in strong sun without a reflective finish.
If the structure is lightweight or the budget tight, torch-on felt or EPDM are common replacements. A compatible liquid-applied system can sometimes be laid over sound asphalt. On larger roofs, single-ply may be considered, and GRP suits smaller roofs needing a hard finish. Our repair or replace guide helps with the decision.
Which towns in Derbyshire do we cover?
- Derby
- Chesterfield
- Long Eaton
- Ilkeston
- Swadlincote
- Staveley
- Belper
- Heanor
- Alfreton
- Dronfield
- Ripley
- Buxton
- New Mills
- Glossop
- Sinfin
Mastic asphalt roofing in Derbyshire: questions
Which towns in Derbyshire do you cover?
All of Derbyshire. The main towns have their own pages below, and if yours isn't listed we still cover it: send your postcode and we'll confirm.
How much does mastic asphalt roofing cost in Derbyshire?
£3,400–£6,100 for a 30 m² mastic asphalt roof including scaffold, at East Midlands guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Which postcode areas do you cover in Derbyshire?
All of Derbyshire, including the DE, NG, S, SK postcode areas. Send your full postcode and we'll confirm.
How heavy is a mastic asphalt roof?
Considerably heavier than felt, rubber or single-ply, which is why it is usually laid on concrete or strong timber decks. We check the structure before recommending asphalt on any roof.
Is mastic asphalt suitable for a balcony or terrace?
Yes, asphalt is traditionally used on terraces and walkways because it takes foot traffic well, often with paving on top. A new balcony or terrace generally needs planning permission, so check before converting a roof.
Is mastic asphalt the same as tarmac?
No. Both contain bitumen, but mastic asphalt is a dense, voidless mix with fine limestone aggregate, made to be fully waterproof, while road surfacing is a different material.
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