Flat Roofing Cambridge

Flat roofing in Cambridge

Here at Roofing Cambridge, we provide flat roof installation services to both domestic and commercial customers.

Our team, equipped with decades of combined experience in the roofing industry, excels in all key aspects of flat roofing construction and maintenance. Moreover, we are skilled in working with a variety of materials and membranes, including rubber, GRP liquid, and felt, ensuring high-quality and durable roofing solutions.

Flat roofing Repair & Maintenance

Flat roofs provide a modern and striking appearance when properly constructed and maintained. However, they can pose unique challenges and issues. Roofing Cambridge is here to assist with flat roof maintenance and repairs. Our thorough inspections quickly pinpoint any problems, and if necessary, we can deploy drone technology for a comprehensive overview of your roof’s condition.

At Roofing Cambridge, we understand the importance of a well-maintained flat roof. Our dedicated team offers specialised repair and maintenance services to ensure your flat roofing remains in optimal condition, protecting your property against the elements. Whether it’s routine maintenance, emergency repairs, or comprehensive assessments using the latest technology, we have the expertise to handle it all. Our reliable services are designed to extend the lifespan of your roof and prevent future issues, ensuring peace of mind and long-term savings.

Flat roofing solutions

We specialise in flat roofing solutions, offering expert installation and repair services for both residential and commercial properties in the Cambridge area. Our durable and efficient flat roofing systems are designed to withstand the elements, providing long-lasting protection and value for your property.

Interested in learning more about the flat roof construction and maintenance services offered by Roofing Cambridge? Simply get in touch, and a member of our team will be happy to provide you with expert advice and solutions tailored to your needs.

Where we fit flat roofs around Cambridge

Flat roofs are everywhere in Cambridge. Almost every Victorian terrace in Chesterton, Romsey and Mill Road has a rear extension or a dormer with a flat roof, the 1930s and post-war semis in Arbury and King’s Hedges often have flat-roofed garages and porches, and the newer estates in Trumpington, Orchard Park and Eddington use flat and low-pitch roofs on extensions and balconies.

We work on all of them, from a single garage roof to a full commercial re-cover:

• Rear and side extensions — the most common job we do, often with a roof lantern or rooflights.
• Dormers and loft conversions — tight details and upstands where a neat finish matters.
• Garages, porches and bay roofs — quick, cost-effective re-covers.
• Balconies and walkways — hard-wearing GRP finishes.
• Commercial flat roofs — offices, shops and managed blocks; see commercial roofing.

EPDM, GRP or felt: which flat roof system is right for you?

We fit all three main systems, so our advice isn’t skewed towards one product. Each has a place:

System	What it is	Typical lifespan	Best for
EPDM rubber	A single seamless sheet of synthetic rubber, bonded to the deck	30–50 years	Most extensions and garages; great value over its life
GRP fibreglass	Glass-fibre matting set in resin, finished with a hard topcoat	25–30 years (recoat every 10–15)	Complex shapes, balconies, roofs with foot traffic
Torch-on felt	Layers of modern bitumen membrane, heat-bonded	15–20 years	Tight budgets, outbuildings, like-for-like re-covers

Lifespans are typical ranges from Checkatrade’s 2026 flat roofing cost guides; workmanship, falls and maintenance make a big difference. We go into more detail on our EPDM rubber roofing, GRP fibreglass roofing and felt roofing pages.

How much does a flat roof cost in Cambridge?

According to Checkatrade’s 2026 data for Cambridge, a new flat roof typically costs between £1,430 and £2,988, with an average of around £2,059, and flat roof repairs average about £1,000. Per square metre, EPDM rubber usually costs £80–£100, GRP £95–£120 and torch-on felt £50–£80 for the covering. A fully insulated warm roof, built from the deck up, is closer to £210 per m².

What moves the price:

• Size and access — a ground-floor garage is quicker than a second-floor dormer that needs scaffolding.
• The deck underneath — if the boards are rotten, they need replacing before the new covering goes on.
• Insulation — replacing more than half of a roof normally means upgrading the insulation to meet Building Regulations.
• Details — roof lanterns, rooflights, upstands, outlets and new edge trims all add time.

The table further down this page gives typical prices for common jobs. Our full flat roof replacement cost guide explains every line item.

Insulation and Building Regulations

If more than 50% of a flat roof is being renovated, Approved Document L expects the whole roof to be brought up to current thermal standards where it is technically and economically feasible. For most homes that means a warm roof: insulation boards laid on top of the deck, under the new waterproof covering, which keeps the timbers warm and dry and avoids condensation problems.

We’ll tell you at the survey whether the rules apply to your roof, explain the options in plain English and deal with building control notification. If you want to understand the difference before we visit, read warm roof vs cold roof.

Cambridge weather and flat roofs

East Anglia is the driest region in the UK, and the Met Office records an average of around 559 mm of rain a year at its Cambridge station. That sounds kind to roofs, but flat roofs here are punished in other ways: long hot summers dry out and crack old felt, around 40 frosty nights a year open up small splits, and the heavy summer downpours we do get find any low spot where water ponds. A flat roof that drains properly and is built from durable materials copes with all of it.

Our flat roofing process

1. Free survey — we inspect the roof (by ladder or drone), check the deck and look inside for signs of leaks.
2. Written quote with options — usually a repair option and a replacement option, with the system, insulation and guarantee spelled out.
3. Strip and prepare — we remove the old covering, replace any rotten decking and fix new timber where needed.
4. Install — insulation (if required), then the EPDM, GRP or felt system with proper upstands, trims and outlets.
5. Tidy up and hand over — we clear the site, show you photos of the finished roof and give you the guarantee in writing.

Repairs are covered by our 5-year warranty, and new roof installations come with our 10-year insurance guarantee.