Great Malvern at a glance
- Postcode districts
- WR14
- Population
- about 36,770 (GeoNames)
- Council area
- Malvern Hills District Council
- Building approval
- Malvern Hills District Council building control, or a registered building control approver
- Nearest main town
- Worcester, about 7 miles
- Guide price region
- West Midlands (baseline rates)
Why choose a green roof in Great Malvern?
If you're replacing an old flat roof in Great Malvern, it's worth deciding whether to add sedum at the same time. If the structure can take it, that is the ideal moment, because the waterproofing is new and the green layers won't need lifting for a long time.
Great Malvern's flat roofs are mostly on 1930s semis with flat-roofed garages and kitchen extensions, with plenty on lock-up garage blocks on estates too. England averages roughly 870 mm of rain a year and the West Midlands sits close to that, so falls and outlets are the difference between a roof that drains and one that ponds.
How much does a green roof cost in Great Malvern?
Guide price in Great Malvern: £4,400–£8,100 for a 20 m² insulated extension roof finished as a sedum green roof, including VAT at West Midlands rates. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Extension (20 m²), EPDM with sedum green roof | £4,400–£8,100 |
| Extension (20 m²), EPDM, new deck + insulation | £2,800–£4,900 |
Can my flat roof take the weight of a green roof?
Not every roof can, which is why we check the structure before quoting. A sedum roof is light compared with an intensive garden, but its growing medium holds water, and a saturated build-up adds significant weight to the roof.
We look at the joist sizes, spans and spacing, the condition of the deck and what the roof sits on. On a recently built extension with generously sized joists, an extensive green roof may be straightforward. On an older garage or a roof with undersized or rotten timbers, the structure may need strengthening, or a structural engineer's calculation may be needed before we can go ahead.
In England, a new roof covering that adds 15% or more to the weight of the roof triggers building control approval, and a green roof will often fall into that category. We handle building control where it is needed. The building regulations page covers the approval routes in each nation.
What's included?
- Gravel strips kept clear around edges and outlets
- Pre-grown sedum blankets laid and watered in
- Warm or inverted build-up to suit the roof
- Structural check of joists, deck and supports
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?
- Worcester · 7 mi
- Tewkesbury · 11 mi
- Droitwich · 13 mi
- Stourport-on-Severn · 16 mi
- Evesham · 16 mi
- Hereford · 17 mi
Green and sedum roofs in Great Malvern: questions
Do you cover Great Malvern?
Yes. Great Malvern is part of our Worcestershire coverage, including postcode districts WR14. 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 Great Malvern?
Where the work needs approval it goes to Malvern Hills District 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 green roof cost in Great Malvern?
£4,400–£8,100 for a 20 m² insulated extension roof finished as a sedum green roof, at West Midlands guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Does a green roof leak more than a normal flat roof?
No, as long as it is built correctly. The waterproofing beneath is what keeps water out, and the green layers protect it from sun and weather. The main risk is building it on a weak or ageing membrane.
Can you put a green roof on a pitched roof?
We install green roofs on flat roofs only. Sloping green roofs need extra restraint to stop the growing medium slipping, and they are a specialist job outside our work.