Thornaby-on-Tees at a glance
- Postcode districts
- TS17
- Population
- about 22,356 (GeoNames)
- Council area
- Stockton-on-Tees Borough Council
- Building approval
- Stockton-on-Tees Borough Council building control, or a registered building control approver
- Nearest main town
- Stockton-on-Tees, about 3 miles
- Guide price region
- Yorkshire and the Humber (−5% on West Midlands rates)
Why choose a green roof in Thornaby-on-Tees?
If you're replacing an old flat roof in Thornaby-on-Tees, 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.
Around Thornaby-on-Tees, flat roofs are common on terraced streets with flat-roofed rear kitchens and bathrooms and on newer estates where the first extension roofs are now being replaced. England averages roughly 870 mm of rain a year; the Pennine side of Yorkshire is wetter and windier than the east, so we specify for the site rather than the county.
How much does a green roof cost in Thornaby-on-Tees?
For Thornaby-on-Tees we use Yorkshire and the Humber rates: £4,200–£7,700 is the guide for a 20 m² insulated extension roof finished as a sedum green roof, VAT included. 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 | £4,200–£7,700 |
| Extension (20 m²), EPDM, new deck + insulation | £2,650–£4,650 |
How long does a green roof last and how much maintenance does it need?
A well-built extensive green roof needs one or two maintenance visits a year, and the plant layer can help protect the membrane from sunlight and temperature swings.
Typical maintenance means pulling out weeds and tree seedlings before they root, clearing outlets and the gravel strips around edges, filling in any bare patches, and adding a slow-release feed if the sedum looks thin. Sedum is drought-tolerant once established, but newly laid blankets may need watering in a long dry spell during the first season.
The waterproofing underneath has the same expected life as on any other roof of that system. A green roof also slows down rainwater run-off from the roof and, when sedum flowers, attracts bees and other insects. Some councils encourage green roofs for those reasons, so it is worth mentioning one in a planning application for a new extension. Our maintenance guide covers routine checks.
What's included?
- Root-resistant membrane or separate root barrier
- Gravel strips kept clear around edges and outlets
- Pre-grown sedum blankets laid and watered in
- 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?
- Stockton-on-Tees · 3 mi
- Yarm · 3 mi
- Billingham · 4 mi
- Middlesbrough · 4 mi
- Guisborough · 10 mi
- Darlington · 10 mi
Green and sedum roofs in Thornaby-on-Tees: questions
Do you cover Thornaby-on-Tees?
Yes. Thornaby-on-Tees is part of our North Yorkshire coverage, including postcode districts TS17. 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 Thornaby-on-Tees?
Where the work needs approval it goes to Stockton-on-Tees 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 a green roof cost in Thornaby-on-Tees?
£4,200–£7,700 for a 20 m² insulated extension roof finished as a sedum green roof, at Yorkshire and the Humber guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
What happens if a green roof needs repairing?
The green layers are lifted around the problem area, the membrane is repaired, and the layers are relaid. Building on a sound, long-life membrane in the first place keeps that to a minimum.
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.