Hertfordshire at a glance
- Largest towns
- Watford, Hemel Hempstead, Stevenage, St Albans
- Postcode areas
- AL, CM, EN, HP, SG, WD
- Building control
- Watford Borough Council, Dacorum Borough Council, Stevenage Borough Council and 7 other councils
- Neighbouring areas
- Bedfordshire · Buckinghamshire · London · Surrey
- Guide price region
- East of England (+5% on West Midlands rates)
Which towns in Hertfordshire do we cover?
20 towns and cities have their own page; we cover everywhere in between too.
- Watford
- Hemel Hempstead
- Stevenage
- St Albans
- Welwyn Garden City
- Cheshunt
- Hatfield
- Bishop's Stortford
- Borehamwood
- Hitchin
- Hoddesdon
- Letchworth Garden City
- Harpenden
- Bushey
- Hertford
- Rickmansworth
- Potters Bar
- Berkhamsted
- Ware
- Royston
What does a flat roof cost in Hertfordshire?
Guide prices at East of England rates, including VAT. The fixed price comes after a survey.
| Job | Guide price inc VAT |
|---|---|
| Localised patch repair | £160–£530 |
| Extension (20 m²), GRP, new deck + insulation | £3,150–£5,650 |
| Extension (20 m²), EPDM, new deck + insulation | £2,950–£5,150 |
| Dormer (8 m²), GRP, scaffold | £1,450–£2,800 |
| Single garage (18 m²), liquid-applied | £2,150–£3,400 |
| Condition survey and leak investigation | £160–£320 |
Which flat roofs are common in Hertfordshire?
Rain and wind decide how a flat roof is detailed. The East of England is the driest part of Britain, with parts of the Anglian region around 630 mm a year, so summer heat and UV, not rainfall, do most of the ageing on a felt roof. Across Hertfordshire, flat roofs are typically found on terraced streets with flat-roofed rear kitchens and bathrooms, 1960s and 1970s link-detached houses with flat-roofed garages and porches and shops with flat-roofed rear stores below flats. Approximate 1991–2020 regional averages based on Met Office data.
Which flat roof jobs do we take on in Hertfordshire?
Extension and kitchen roofs
Rooflights fitted after the roof was built are a frequent source of trouble in Hertfordshire extensions. If the kerb was not formed properly or the membrane was simply sealed around the frame, leaks follow. Replacing the roof is the chance to rebuild every upstand to a proper standard.
Flat roof replacement
A mineral felt roof laid decades ago may still look intact from the ground in Hertfordshire, yet have lost its chippings, cracked at the laps and pulled away at the upstands. Those faults let water track under the covering, so by the time a ceiling stain appears, the deck has often been wet for some time.
Commercial flat roofing
Businesses in Hertfordshire need a roofing contractor who arrives with a plan, not just a price. We put the system, build-up, phasing, access and payment terms in a fixed written quote, and keep each section of the roof watertight before the team leaves site, so trading is not put at risk.
Building regulations in England
Replacing more than half of a flat roof over a heated room usually counts as renovating a thermal element, so the roof is insulated to around 0.16 W/m²K where that's technically and economically feasible, and the work is notified to building control: the council or a registered building control approver, unless a registered competent person self-certifies it. A roof on a new extension is built to 0.15 W/m²K. Patch repairs, and most unheated detached garages, don't trigger the upgrade. Structural changes, or a new covering that adds 15% or more to the roof's weight, also need approval. More on the rules.
Which services do we offer in Hertfordshire?
- Torch-on felt roofing
- GRP fibreglass roofing
- Garage roofs
- Balconies and roof terraces
- Green and sedum roofs
- Emergency leak repairs
- Edge trims, outlets and drainage
- Flat roof repairs
- EPDM rubber roofing
- Warm roof insulation upgrades
- Mastic asphalt roofing
- Commercial flat roofing
- Flat roof surveys and leak tracing
- Single-ply membrane roofing
- Porch, bay and canopy roofs
- Flats, HMOs and block roofs
- Dormer roofs
- Flat roof replacement
- Liquid-applied roofing
- Rooflights in flat roofs
- Extension and kitchen roofs
Flat roofing in Hertfordshire: questions
Which postcode areas do you cover in Hertfordshire?
All of Hertfordshire, including the AL, CM, EN, HP, SG, WD postcode areas. Send your full postcode and we'll confirm.
Who approves flat roof work in Hertfordshire?
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. We check this at the survey and handle the application as part of the job.
Do you cover all of Hertfordshire?
Yes. We cover the whole of Hertfordshire, including Watford, Hemel Hempstead, Stevenage, St Albans. If your town isn't listed, send your postcode and we'll confirm.
Do you work on commercial roofs in Hertfordshire?
Yes: shops, offices, units and blocks of flats across Hertfordshire, with work planned around opening hours and residents.