Shrewsbury at a glance
- Postcode districts
- SY1, SY2, SY3
- Population
- about 76,782 (GeoNames)
- Council area
- Shropshire Council
- Building approval
- Shropshire Council building control, or a registered building control approver
- Nearest main town
- Telford, about 13 miles
- Guide price region
- West Midlands (baseline rates)
When should a flat roof in Shrewsbury be replaced?
Selling or letting a property in Shrewsbury can also prompt a replacement. A buyer's surveyor will usually flag a flat roof near the end of its life, and a recent replacement with written workmanship and material guarantees answers that question before it turns into a negotiation point.
Around Shrewsbury, flat roofs are common on low-rise post-war blocks of flats and on bungalows with flat-roofed side extensions and dormers. 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 flat roof replacement cost in Shrewsbury?
At West Midlands guide rates, a 20 m² extension roof in EPDM with a new deck and insulation comes to £2,800–£4,900 including VAT. 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 | £2,800–£4,900 |
| Single garage (18 m²), torch-on felt | £1,500–£2,600 |
| Extension (20 m²), GRP, new deck + insulation | £3,000–£5,400 |
| Single garage (18 m²), EPDM rubber | £1,600–£2,800 |
Should I overlay my old flat roof or strip it fully?
Strip it fully if the deck is soft, the insulation is wet or the falls are wrong; an overlay only suits a dry, sound roof that already drains well. Covering a wet roof traps the moisture, and rot carries on out of sight.
An overlay also raises the roof level, eating into upstand height at walls and door thresholds, and every layer adds weight. In England, a covering that adds 15% or more to the roof's weight needs building control approval. Signs it is time to replace rather than repair:
- ponding that lingers long after rain
- blisters, cracking or crazing across wide areas
- bare bitumen where the mineral chippings have gone
- split laps and lifted upstands or flashings
- damp ceilings, or a deck that has gone soft
- leaks that return after each repair
A single defect on an otherwise dry roof can usually be put right with a repair. If you're unsure, a survey settles it, and our guides to overlay or strip and repair or replace go further.
What's included?
- Free survey of the deck, falls, edges and insulation
- Building control handled where needed, plus a written workmanship guarantee
- New membrane, upstands, edge trims and outlets
- Strip-out of the old covering, with waste and skip
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?
Flat roof replacement in Shrewsbury: questions
Do you cover Shrewsbury?
Yes. Shrewsbury is part of our Shropshire coverage, including postcode districts SY1, SY2, SY3. 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 Shrewsbury?
Where the work needs approval it goes to Shropshire 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 flat roof replacement cost in Shrewsbury?
£2,800–£4,900 for a 20 m² extension roof in EPDM with a new deck and insulation, at West Midlands guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Will a replacement make my roof higher?
Usually a little, if insulation is added above the deck. We check door thresholds, window sills, upstands and wall flashings at survey so the new level works.
Is VAT charged on a flat roof replacement?
Yes, roof replacement is standard-rated at 20%, and an insulated replacement is treated as a single supply. Our guide prices already include VAT.