Waltham Forest at a glance
- Postcode districts
- E17, E10, E18, E11, E4, IG8
- Council area
- London Borough of Waltham Forest
- Building approval
- London Borough of Waltham Forest building control, or a registered building control approver
- Guide price region
- London (+20% on West Midlands rates)
Why choose torch-on felt roofing in Waltham Forest?
On larger roofs in Waltham Forest with poor falls, torch-on felt pairs well with tapered insulation, which builds the fall into the insulation boards. That deals with ponding properly while adding insulation, rather than patching the low spots and waiting for the next leak.
Around Waltham Forest, flat roofs are common on shops with flat-roofed stores below flats above and on mansion blocks and purpose-built flats with large flat roofs. 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 torch-on felt roof cost in Waltham Forest?
At London guide rates, a typical 18 m² garage roof in torch-on felt comes to £1,800–£3,150 including VAT. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Single garage (18 m²), torch-on felt | £1,800–£3,150 |
| Extension (20 m²), felt, new deck + insulation | £3,250–£5,600 |
| Block of flats (150 m²), felt + insulation + scaffold | £18,650–£32,650 |
| Single garage (18 m²), EPDM rubber | £1,900–£3,350 |
| Extension (20 m²), EPDM, new deck + insulation | £3,350–£5,850 |
Does replacing a felt roof mean upgrading the insulation?
Usually, yes, when the roof is over a heated space and more than half of it is being re-covered. In England, Wales and Northern Ireland that is renovation of a thermal element, which should be brought towards the renovation U-value where feasible; a Scottish project goes through the council's building standards service, which confirms whether a warrant applies.
A felt replacement is a good point to switch to a warm roof, with insulation laid above the deck under the new membranes. On larger roofs, tapered insulation can also correct poor falls that have caused ponding, which a patch repair cannot fix. Raising the roof level affects upstands and door thresholds, so we check heights at survey. Any approval is arranged by us as part of the job, and the building regulations page sets out the rules by nation.
What's included?
- Hot-works checks and fire watch on every torch-on job
- Deck inspection with replacement of damaged boards
- Two- or three-layer reinforced bitumen membrane with staggered laps
- Mineral-finished cap sheet, upstands, outlets and edge trims
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?
Torch-on felt roofing in Waltham Forest: questions
Do you cover Waltham Forest?
Yes. Waltham Forest is part of our London coverage, including postcode districts E17, E10, E18, E11, E4, IG8. 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 Waltham Forest?
Where the work needs approval it goes to London Borough of Waltham Forest 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 torch-on felt roof cost in Waltham Forest?
£1,800–£3,150 for a typical 18 m² garage roof in torch-on felt, at London guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Is torch-on suitable for a block of flats?
Yes, layered bitumen systems are widely used on blocks of flats and commercial buildings. Larger roofs often use three layers and insulation, with hot works planned around residents.
How long does it take to lay a torch-on felt roof?
A garage roof typically takes one to two days and an insulated extension two to three. Larger roofs and blocks are phased over longer, with each area made weathertight before the team leaves.