Northamptonshire at a glance
- Largest towns
- Northampton, Corby, Kettering, Wellingborough
- Postcode areas
- NN
- Building control
- West Northamptonshire Council and North Northamptonshire Council
- Neighbouring areas
- Leicestershire · Bedfordshire · Warwickshire · Cambridgeshire
- Guide price region
- East Midlands (−2% on West Midlands rates)
Which towns in Northamptonshire do we cover?
6 towns and cities have their own page; we cover everywhere in between too.
What does a flat roof cost in Northamptonshire?
Guide prices at East Midlands rates, including VAT. The fixed price comes after a survey.
| Job | Guide price inc VAT |
|---|---|
| Extension (20 m²), felt, new deck + insulation | £2,650–£4,600 |
| Single garage (18 m²), liquid-applied | £2,000–£3,200 |
| Condition survey and leak investigation | £150–£290 |
| Extension (20 m²), EPDM, insulation + 1 rooflight upstand | £2,950–£5,150 |
| Localised patch repair | £150–£490 |
| Dormer (8 m²), GRP, scaffold | £1,350–£2,600 |
Which flat roofs are common in Northamptonshire?
The climate is part of the brief. 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. Across Northamptonshire, flat roofs are typically found on bungalows with flat-roofed side extensions and dormers, low-rise post-war blocks of flats 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 Northamptonshire?
Torch-on felt roofing
Torch-on is a good fit in Northamptonshire when the budget matters but quality cannot slip. Modern polyester-reinforced membranes typically last 15 to 25 years, high-performance systems longer, and manufacturer material guarantees are available on many specified systems, registered where the system allows.
Commercial flat roofing
A commercial re-roof in Northamptonshire has to fit around customers, staff and deliveries. We agree working hours, skip positions and access routes before we start, keep fire exits clear throughout, and choose a flame-free system where your site does not allow hot works near stock or occupied rooms.
Balconies and roof terraces
Owners of flats in Northamptonshire sometimes find that a neighbour's balcony is leaking into their home. Where a balcony serves one flat but sits over another, the repair needs proper waterproofing and drainage, and a clear written specification helps everyone involved agree the work.
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 Northamptonshire?
- Green and sedum roofs
- Porch, bay and canopy roofs
- Liquid-applied roofing
- Flat roof repairs
- Commercial flat roofing
- Rooflights in flat roofs
- GRP fibreglass roofing
- Warm roof insulation upgrades
- Dormer roofs
- Flats, HMOs and block roofs
- Mastic asphalt roofing
- Flat roof replacement
- Emergency leak repairs
- Flat roof surveys and leak tracing
- Single-ply membrane roofing
- Edge trims, outlets and drainage
- Torch-on felt roofing
- Balconies and roof terraces
- EPDM rubber roofing
- Extension and kitchen roofs
- Garage roofs
Flat roofing in Northamptonshire: questions
Which council handles building control for a flat roof in Northamptonshire?
It depends on where the roof is: in Northamptonshire that's West Northamptonshire Council and North Northamptonshire Council. 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 confirm which applies at the survey.
Do you work on commercial roofs in Northamptonshire?
Yes: shops, offices, units and blocks of flats across Northamptonshire, with work planned around opening hours and residents.
How soon can you survey a roof in Northamptonshire?
It depends on the time of year and where the roof is; we give you a date when you get in touch, and leaks are prioritised.
Which roofing systems do you fit in Northamptonshire?
EPDM rubber, GRP fibreglass, torch-on felt, liquid-applied and single-ply, plus mastic asphalt repairs. The survey decides which suits your roof.