Keynsham at a glance
- Postcode districts
- BS31
- Population
- about 19,603 (GeoNames)
- Council area
- Bath & North East Somerset Council
- Building approval
- Bath & North East Somerset Council building control, or a registered building control approver
- Nearest main town
- Bristol, about 5 miles
- Guide price region
- South West (+3% on West Midlands rates)
Why choose torch-on felt roofing in Keynsham?
Torch-on felt is widely specified for blocks of flats and HMOs, in Keynsham as elsewhere, because the system is well understood, widely repairable and governed by a British Standard code of practice. Three-layer builds with insulation are common on larger, multi-occupied roofs.
Around Keynsham, flat roofs are common on terraced streets with flat-roofed rear kitchens and bathrooms and on low-rise post-war blocks of flats. The South West averages roughly 1,260 mm of rain a year and many roofs face wind off the Atlantic, so we specify fixings and edge details for wind uplift as well as drainage.
How much does a torch-on felt roof cost in Keynsham?
For Keynsham we use South West rates: £1,550–£2,700 is the guide for a typical 18 m² garage roof in torch-on felt, VAT included. 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 | £1,550–£2,700 |
| Extension (20 m²), felt, new deck + insulation | £2,800–£4,850 |
| Block of flats (150 m²), felt + insulation + scaffold | £16,000–£28,000 |
| Single garage (18 m²), EPDM rubber | £1,650–£2,900 |
| Extension (20 m²), EPDM, new deck + insulation | £2,900–£5,050 |
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?
- Two- or three-layer reinforced bitumen membrane with staggered laps
- Vapour control layer and warm-roof insulation where needed
- Deck inspection with replacement of damaged boards
- Strip-off of the existing roof covering and removal of waste
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 Keynsham: questions
Do you cover Keynsham?
Yes. Keynsham is part of our Somerset coverage, including postcode districts BS31. 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 Keynsham?
Where the work needs approval it goes to Bath & North East Somerset Council 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 Keynsham?
£1,550–£2,700 for a typical 18 m² garage roof in torch-on felt, at South West guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
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.
Is torch-on felt better than the old felt roofs?
Yes, considerably. Modern torch-on membranes are polymer-modified and polyester-reinforced, laid in bonded layers, and typically last much longer than the older felt systems they replace.