Camden at a glance
- Postcode districts
- NW1, W1W, W1T, WC1E, WC1H, N1C, WC1B, WC1 and 11 more
- Council area
- London Borough of Camden
- Building approval
- London Borough of Camden building control, or a registered building control approver
- Guide price region
- London (+20% on West Midlands rates)
When should a flat roof in Camden be replaced?
A mineral felt roof laid decades ago may still look intact from the ground in Camden, 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.
Around Camden, flat roofs are common on mansard and dormer loft conversions and on Victorian and Edwardian terraces with flat-roofed back additions. The Thames basin is one of the drier parts of Britain at roughly 730 mm of rain a year, but summer heat is the bigger test here: dark membranes on south-facing roofs swing a long way in temperature.
How much does a flat roof replacement cost in Camden?
Guide price in Camden: £3,350–£5,850 for a 20 m² extension roof in EPDM with a new deck and insulation, including VAT at London rates. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Extension (20 m²), EPDM, new deck + insulation | £3,350–£5,850 |
| Single garage (18 m²), torch-on felt | £1,800–£3,150 |
| Extension (20 m²), GRP, new deck + insulation | £3,600–£6,450 |
| Single garage (18 m²), EPDM rubber | £1,900–£3,350 |
How long does it take to replace a flat roof?
A garage or single-storey extension roof is usually stripped and re-covered in one to three working days; larger, higher or more detailed roofs take longer. Weather sets the pace, because the deck must be dry before insulation and membrane go down.
We strip only as much as can be made weathertight that day, so the roof is never left open overnight. Expect noise and some vibration during the strip, a skip on the drive (or on the road with a permit) and ladders or a tower against the house. Rooms below stay usable, though it helps to clear shelves near the ceiling. Resin systems such as GRP smell strongly while they cure, so keep nearby windows closed that day. Two-storey roofs need scaffold, which goes up before we start and comes down after sign-off.
What's included?
- Building control handled where needed, plus a written workmanship guarantee
- Strip-out of the old covering, with waste and skip
- New deck, firrings and warm-roof insulation where needed
- Free survey of the deck, falls, edges and insulation
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 nearby areas do we also cover?
- Westminster · 1 mi
- Islington · 2 mi
- Kensington and Chelsea · 3 mi
- Hackney · 4 mi
- Hammersmith and Fulham · 4 mi
- Haringey · 4 mi
Flat roof replacement in Camden: questions
Do you cover Camden?
Yes. Camden is part of our London coverage, including postcode districts NW1, W1W, W1T, WC1E, WC1H, N1C and 13 more. Surveys and roofs are carried out by vetted roofing teams working under S&K Property Investments and Improvement Ltd.
Who checks building regulations for a flat roof in Camden?
Where the work needs approval it goes to London Borough of Camden building control, or a registered building control approver. We tell you at the survey whether your job needs it and deal with the paperwork as part of the quote.
How much does a flat roof replacement cost in Camden?
£3,350–£5,850 for a 20 m² extension roof in EPDM with a new deck and insulation, at London guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Can you replace just part of a flat roof?
Sometimes, if the rest is sound and dry. Renovating more than half of a roof over a heated room usually brings the whole roof under the insulation rules, so a full replacement can make more sense.
What time of year is best for a flat roof replacement?
Late spring to early autumn gives the most reliable dry spells, but a roof can be replaced in any season when the forecast allows. Adhesives and resins have minimum application temperatures, so winter work is planned around mild, dry days.