Welwyn Garden City at a glance
- Postcode districts
- AL7, AL8
- Population
- about 51,505 (GeoNames)
- Council area
- Welwyn Hatfield Borough Council
- Building approval
- Welwyn Hatfield Borough Council building control, or a registered building control approver
- Nearest main town
- St Albans, about 6 miles
- Guide price region
- East of England (+5% on West Midlands rates)
Why choose EPDM rubber roofing in Welwyn Garden City?
Rubber is a sensible pick in Welwyn Garden City where a roof sits close to bedrooms or a kitchen and you would rather avoid hot works. It suits porches, bays and dormers too, where the small area means a single sheet can cover the whole roof with no joins at all.
Welwyn Garden City's flat roofs are mostly on low-rise post-war blocks of flats, with plenty on newer estates where the first extension roofs are now being replaced too. 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.
How much does an EPDM rubber roof cost in Welwyn Garden City?
For Welwyn Garden City we use East of England rates: £1,700–£2,950 is the guide for a typical 18 m² garage roof in EPDM, VAT included. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Single garage (18 m²), EPDM rubber | £1,700–£2,950 |
| Extension (20 m²), EPDM, new deck + insulation | £2,950–£5,150 |
| Porch or bay (4 m²), EPDM | £800–£1,300 |
Do I need building regulations approval to replace a roof with EPDM?
Often, yes. In England, Wales and Northern Ireland, re-covering more than half of a flat roof over a heated room usually counts as renovating a thermal element, so the roof should be insulated towards the renovation standard where that is feasible; in Scotland, the council's building standards service decides whether a building warrant is needed.
An unheated detached garage normally falls outside these rules, and a patch repair is treated differently from a full re-cover.
In practice that means a warm roof: insulation above the deck, a vapour control layer beneath it and the EPDM on top. The extra thickness lifts the finished roof, so at survey we check door thresholds, window cills, wall flashings and upstand heights, aiming for an upstand of about 150 mm above the finished surface. Where approval is needed, we deal with building control or building standards for you. The building regulations page and our warm vs cold roof guide go into more detail.
What's included?
- Warm-roof insulation and vapour control layer where required
- Written workmanship guarantee, plus manufacturer guarantee registration where available
- EPDM membrane fully bonded, in one sheet where the roof size allows
- New drip and kerb trims, outlets and upstand details
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?
EPDM rubber roofing in Welwyn Garden City: questions
Do you cover Welwyn Garden City?
Yes. Welwyn Garden City is part of our Hertfordshire coverage, including postcode districts AL7, AL8. 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 Welwyn Garden City?
Where the work needs approval it goes to Welwyn Hatfield Borough 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 an EPDM rubber roof cost in Welwyn Garden City?
£1,700–£2,950 for a typical 18 m² garage roof in EPDM, at East of England guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Can you walk on an EPDM roof?
Occasionally, for maintenance, yes, but EPDM is not designed as a regular walking surface. Where you need a route to plant or windows, walkway pads can be bonded on, or GRP may be a better fit.
Can you put a green roof on top of EPDM?
Yes. EPDM is often used under sedum, with a protection layer, drainage and growing medium laid on top. The structure must be able to carry the extra weight, which we check before quoting.