- Price per m²
- £84–£135
- Typical life
- 25–35+ years
- Manufacturer guarantees
- 20–25 year guarantees on specified systems
- Typical garage roof
- £1,900–£3,100
County Durham at a glance
- Largest towns
- Darlington, Hartlepool, Stockton-on-Tees, Durham
- Postcode areas
- DH, DL, SR, TS
- Building control
- Darlington Borough Council, Hartlepool Borough Council, Stockton-on-Tees Borough Council and 1 other council
- Neighbouring areas
- Tyne and Wear · Northumberland · North Yorkshire · Cumbria
- Guide price region
- North East (−7% on West Midlands rates)
How much does a single-ply roof cost in County Durham?
Guide prices including VAT at North East rates. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Commercial roof (100 m²), single-ply + insulation | £12,300–£20,250 |
| Single garage (18 m²), single-ply | £1,900–£3,100 |
| Single garage (18 m²), EPDM rubber | £1,500–£2,600 |
| Extension (20 m²), EPDM, new deck + insulation | £2,600–£4,550 |
Which flat roofs are common in County Durham?
Flat roofs in County Durham sit on lock-up garage blocks on estates, newer estates where the first extension roofs are now being replaced and shops with flat-roofed rear stores below flats. England averages roughly 870 mm of rain a year; the North East is drier than the west but cold and windy near the coast, so wind uplift and freeze-thaw are in the specification. Approximate 1991–2020 regional averages based on Met Office data.
Building regulations in England
Replacing more than half of a roof over a heated room usually counts as renovating a thermal element, so it is insulated to current standards and notified to building control. Renovated roofs over heated rooms are insulated to around 0.16 W/m²K where that's feasible, and new extension roofs are built to 0.15 W/m²K. In County Durham the application goes to Darlington Borough Council, Hartlepool Borough Council, Stockton-on-Tees Borough Council and 1 other council. More on the rules.
Is single-ply the right system for my roof?
Single-ply is usually the right system for medium and large flat roofs, such as shops, offices, units, surgeries, clubs and blocks, where speed of installation, light weight and long life matter. On a small domestic roof it can work well, though it is not always the most economical choice.
In its favour: lightweight; quick to lay over large areas; flame-free, as the seams are welded with hot air; long typical life; welded details at rooflights and plant; lighter-coloured membranes reflect more sunlight.
Against it: only one waterproof layer, so welding quality is critical; can be punctured by foot traffic or dropped tools without walkway protection; PVC needs separating from bitumen; repairs need compatible material and welding equipment.
For a small garage or extension, EPDM is often simpler. Where people walk regularly, GRP or a liquid system may be tougher. A multi-layer torch-on felt roof gives built-in redundancy, and on older buildings mastic asphalt may be the original material. Our commercial flat roofing page covers larger jobs.
What insulation and approvals does a single-ply re-roof need?
On a heated building, a full single-ply re-roof usually triggers the thermal-element rules, so insulation should be brought towards the renovation standard where feasible. In England that is 0.18 W/m²K for non-domestic and 0.16 W/m²K for domestic roofs, with Wales and Northern Ireland setting their own figures; Scottish roofs follow Section 6 of the building standards, and the council confirms whether a building warrant is required.
Single-ply suits a warm roof well, and tapered insulation can correct poor falls at the same time. A thicker build-up raises the roof, so we check upstand heights, door thresholds and rooflight kerbs at survey. Near boundaries, the external fire classification of the tested build-up can matter. We handle building control or building standards where needed; see the building regulations page.
Which towns in County Durham do we cover?
- Darlington
- Hartlepool
- Stockton-on-Tees
- Durham
- Chester-le-Street
- Billingham
- Stanley
- Consett
- Newton Aycliffe
- Bishop Auckland
- Seaham
- Peterlee
- Spennymoor
Single-ply membrane roofing in County Durham: questions
Which towns in County Durham do you cover?
All of County Durham. The main towns have their own pages below, and if yours isn't listed we still cover it: send your postcode and we'll confirm.
How much does a single-ply roof cost in County Durham?
£12,300–£20,250 for a 100 m² commercial roof in single-ply with insulation, at North East guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Which postcode areas do you cover in County Durham?
All of County Durham, including the DH, DL, SR, TS postcode areas. Send your full postcode and we'll confirm.
How long does a commercial single-ply roof take?
A roof of around 100 m² typically takes several days, depending on strip-out, insulation, details and weather. Work is phased so the building stays weathertight and occupied areas are protected.
Can single-ply be used on a house?
Yes. It can be used on garages, extensions and dormers, usually adhered rather than mechanically fixed. On small domestic roofs, though, EPDM or GRP is often more economical.
Does single-ply work with solar panels or a green roof?
Usually, yes. Many systems can be specified for sedum or ballasted green roofs, and solar mounts can be welded or ballasted, though the structure and wind loads must be checked first.
Everything about single-ply membrane roofing → · All flat roofing in County Durham →