Flat Roofing Contractors in Gwynedd

Gwynedd at a glance

Largest towns: Bangor, Gwynedd, Caernarfon
Postcode areas: LL
Building control: Gwynedd Council
Neighbouring areas: Isle of Anglesey · Conwy · Denbighshire · Flintshire
Guide price region: Wales (−8% on West Midlands rates)

Which towns in Gwynedd do we cover?

2 towns and cities have their own page; we cover everywhere in between too.

What does a flat roof cost in Gwynedd?

Guide prices at Wales rates, including VAT. The fixed price comes after a survey.

Job	Guide price inc VAT
Commercial roof (100 m²), single-ply + insulation	£12,150–£20,050
Extension (20 m²), GRP, new deck + insulation	£2,750–£4,950
Localised patch repair	£140–£460
Dormer (8 m²), GRP, scaffold	£1,300–£2,450
Single garage (18 m²), liquid-applied	£1,900–£3,000
Condition survey and leak investigation	£140–£280

Which flat roofs are common in Gwynedd?

The climate is part of the brief. Wales averages roughly 1,460 mm of rain a year, among the wettest in Britain, so we design for steady run-off: proper falls, clear outlets and upstands well above the finished roof. Across Gwynedd, flat roofs are typically found on newer estates where the first extension roofs are now being replaced, 1960s and 1970s link-detached houses with flat-roofed garages and porches and terraced streets with flat-roofed rear kitchens and bathrooms. Approximate 1991–2020 regional averages based on Met Office data.

Which flat roof jobs do we take on in Gwynedd?

Dormer roofs

If your dormer in Gwynedd was added years ago with a basic felt roof and little insulation, it will tend to fail at the edges first, and they leave the loft room cold in winter and hot in summer. A warm-roof replacement deals with both problems at once.

Garage roofs

If your garage in Gwynedd has an old cement sheet roof, it will eventually crack and let in water. Any suspected asbestos is tested and removed by a licensed specialist first, then the garage can be given new timbers, a deck and a modern membrane that should last for decades with sensible maintenance.

EPDM rubber roofing

Rubber is a sensible pick in Gwynedd 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.

Building regulations in Wales

The Welsh Approved Document L applies. Renovating more than half of a roof over a heated room means upgrading it to around 0.16 W/m²K where feasible, and new extension roofs are built to 0.13 W/m²K. Welsh Government guidance is that most re-roofing needs building control approval, so check whenever more than a quarter of a roof is replaced or repaired. We deal with the application as part of the job. More on the rules.

Which services do we offer in Gwynedd?

Flat roofing in Gwynedd: questions

Do you cover all of Gwynedd?

Yes. We cover the whole of Gwynedd, including Bangor, Gwynedd, Caernarfon. If your town isn't listed, send your postcode and we'll confirm.

How soon can you survey a roof in Gwynedd?

It depends on the time of year and where the roof is; we give you a date when you get in touch, and leaks are prioritised.

Who approves flat roof work in Gwynedd?

Welsh guidance is that most re-roofing needs building control approval, so it's worth checking whenever more than a quarter of a roof is replaced or repaired. We check this at the survey and handle the application as part of the job.

Do you work on commercial roofs in Gwynedd?

Yes: shops, offices, units and blocks of flats across Gwynedd, with work planned around opening hours and residents.

Flat roofing contractors in Gwynedd