Flat Roofing Contractors in West Sussex

West Sussex at a glance

Largest towns: Crawley, Worthing, Bognor Regis, Littlehampton
Postcode areas: BN, PO, RH
Building control: Crawley Borough Council, Worthing Borough Council, Arun District Council and 4 other councils
Neighbouring areas: East Sussex · Surrey · Hampshire · London
Guide price region: South East (+10% on West Midlands rates)

Which towns in West Sussex do we cover?

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

What does a flat roof cost in West Sussex?

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

Job	Guide price inc VAT
Single garage (18 m²), EPDM rubber	£1,750–£3,100
Upstand or flashing repair	£280–£720
Porch or bay (4 m²), EPDM	£850–£1,400
Single garage (18 m²), liquid-applied	£2,250–£3,600
Commercial roof (100 m²), single-ply + insulation	£14,550–£23,950
Single garage (18 m²), GRP fibreglass	£1,950–£3,600

Which flat roofs are common in West Sussex?

Weather matters on a flat roof. Much of the South East sits in the drier Thames catchment at roughly 730 mm of rain a year, so the usual failures are at joints, upstands and outlets rather than from sheer volume of rain. Across West Sussex, flat roofs are typically found on newer estates where the first extension roofs are now being replaced, terraced streets with flat-roofed rear kitchens and bathrooms and lock-up garage blocks on estates. Approximate 1991–2020 regional averages based on Met Office data.

Which flat roof jobs do we take on in West Sussex?

Flat roof surveys and leak tracing

Landlords and managing agents in West Sussex often need a written record of a roof's condition, for budgeting, for leaseholders, or to show a problem has been looked at properly. A survey report gives them a clear basis for deciding when to repair and when to replace.

Emergency leak repairs

Businesses in West Sussex can't trade properly with water dripping onto the shop floor or into an office. An emergency visit makes the roof temporarily weathertight, and the inspection that follows tells you whether a repair will hold or the roof needs replacing.

Dormer roofs

High, exposed dormers in West Sussex take the full force of the wind and rain. Edge trims loosen, flashings lift and the felt at the drip edge cracks. Once the faults spread around the perimeter, a new roof with fresh trims usually lasts far longer than another round of repairs.

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 services do we offer in West Sussex?

Flat roofing in West Sussex: questions

Do you work on commercial roofs in West Sussex?

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

Do you cover all of West Sussex?

Yes. We cover the whole of West Sussex, including Crawley, Worthing, Bognor Regis, Littlehampton. If your town isn't listed, send your postcode and we'll confirm.

How much is a new flat roof in West Sussex?

A typical 18 m² EPDM garage roof is £1,750–£3,100 and a 20 m² insulated GRP extension roof is £3,300–£5,900, at South East guide rates including VAT.

Which roofing systems do you fit in West Sussex?

EPDM rubber, GRP fibreglass, torch-on felt, liquid-applied and single-ply, plus mastic asphalt repairs. The survey decides which suits your roof.

Flat roofing contractors in West Sussex