Flat Roof Installation, Repairs & Replacement in Aylesbury
Reliable flat roofing for garages, extensions, dormers and outbuildings across Aylesbury, installed and repaired properly with clear advice and no shortcuts.
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Flat Roofing Services in Aylesbury
Our Services
About Our Flat Roofing Work in Aylesbury
We work across Aylesbury on garages, extensions, bays, dormers and small commercial roofs. You’ll get straightforward advice, a written quote and a team that turns up when they say they will. We keep the job tidy, protect your property and finish the details properly so the roof performs as it should.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Install in Aylesbury
Different buildings suit different roofing systems. We help you choose based on lifespan, budget, appearance and how the roof is used.
EPDM Rubber Roofing
EPDM is a flexible rubber membrane that handles temperature changes well and resists cracking. It’s a popular choice for garages and extensions where low maintenance and long service life are priorities. Installed with proper trims and drainage, it’s a dependable long-term solution.
GRP Fibreglass Roofing
GRP fibreglass roofing provides a hard-wearing, seamless finish. It’s ideal where occasional foot access is needed, such as for window or gutter maintenance. The result is a strong, watertight surface with clean edges and a neat appearance.
Torch-On Felt Roofing
Modern torch-on felt systems offer multi-layer protection and far better durability than older felt roofs. They remain a practical and cost-effective option for garages, sheds and extensions where reliability and value matter.
Liquid Flat Roofing Systems
Liquid systems are well suited to roofs with awkward shapes, multiple upstands or complex detailing. The coating forms a continuous waterproof layer, reducing weak points. They can also be suitable for refurbishments where full removal isn’t practical, depending on the roof’s condition.
Why Homeowners in Aylesbury Choose Us?
Homeowners choose us for clear advice, honest pricing and flat roofing work that’s done properly. We focus on long-term results, not rushed fixes, and take pride in leaving roofs watertight, tidy and built to last.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
What local customers say about our flat roofing work in Aylesbury
Removal of Chimney stack, replacement of roof underlay, guttering and flat roof repair. - Mitchell from Alliance Roofing & Building was the only builder, of many that I had contacted, that climbed a ladder to inspect my flat-roof and to climb into my loft-space to inspect the main roof from the inside. After an extensive review of my property and discussing my options, he emailed me his quotation on the same day. Booking in dates for Alliance & Roofing to commence work was quick and effortless. They arrived on time, completed the work as planned to a professional standard. Provided Photos of work carried out at all stages. I highly recommend Alliance Roofing & Building.
New roof on my bungalow - I recently had the pleasure of working with Alliance Roofing and Building to install a new roof on my bungalow, and I couldn't be more satisfied with the results. From start to finish, the entire process was smooth and professional. Mitchell, who led the project, was exceptional. His expertise and dedication were evident from the moment he arrived. He and his team were not only highly skilled but also incredibly helpful and courteous throughout the entire job. They took the time to answer all my questions
New slate roof - Mitchell and his team installed my new roof and I'm very satisfied. The quality is superb, they were professional, punctual, and communicative. The project finished on time and the site was left spotless.
Guttering repair - Mitchell came to repair my guttering, he was on time, polite, efficient and conscientious. He kept me informed at each stage of the work that was needed.
Roof repairs - Mitchell repointed a chimney and installed a chimney cowl. He also did some cementing work to the roof. Mitchell was very polite and a conscientious worker. He kept me informed throughout the job. Mitchell was able to give me a quote and do the repair work within a few days. I wouldn’t hesitate to recommend Alliance Roofing & Building.
Replacement of flat roof - Mitchell and his team are smart, communicative, skilled, friendly, helpful, trustworthy and reliable. I would highly recommend their roofing services.
Roof tile replacement and chimney repair - Mitchell and his team are reliable, efficient and hard working. We will certainly use them again in the future. Thanks guys
Chimey Removal & Other Minor Repairs - Mitchell was the only roofer who quoted for the job that actually took the time to go up on the roof to inspect the issue, which was appreciated at the time. He fitted us in around other jobs within 2 weeks to get the work done in a timely manner. The work (which included the removal of a chimney stack to below the roof line, repointing the ridge line, and various other patch repairs) appears to have been completed to a good standard (posting days after completion). Mitchell and his team were polite, conscientious and happy to help throughout the job.
Fixed the roof, including all the felting and repaired the chimney. - Good communication throughout. Good work. Very happy with the service.
Roof repair - Great, really friendly and nice team
Tile realignment/repair and felt renewal - Mitchell and his team were excellent. Would definitely recommend Alliance. The team were on time (in fact they were able to begin the job half a day earlier than initially discussed), polite, efficient and kept us informed of progress each day. We could not have asked for a better service.
Roof verge repair. - Mitchell was polite, friendly and knowledgeable. The team were polite and efficient. The work was completed for the price quoted, which was competitive, and in the timeframe advised.
repair of box gutter behind parapet wall - Mitchell undertook a detailed diagnosis of the work required, started the job quite quickly and completed it satisfactorily.
Leak in the roof- Very polite and professional. Job was completed professionally at a very good price. Would highly recommend
New slate roof - Mitchell and his team installed my new roof and I'm very satisfied. The quality is superb, they were professional, punctual, and communicative. The project finished on time and the site was left spotless.
Roof repairs - Mitchell repointed a chimney and installed a chimney cowl. He also did some cementing work to the roof. Mitchell was very polite and a conscientious worker. He kept me informed throughout the job. Mitchell was able to give me a quote and do the repair work within a few days. I wouldn’t hesitate to recommend Alliance Roofing & Building.
Roof tile replacement and chimney repair - Mitchell and his team are reliable, efficient and hard working. We will certainly use them again in the future. Thanks guys
Chimey Removal & Other Minor Repairs - Mitchell was the only roofer who quoted for the job that actually took the time to go up on the roof to inspect the issue, which was appreciated at the time. He fitted us in around other jobs within 2 weeks to get the work done in a timely manner. The work (which included the removal of a chimney stack to below the roof line, repointing the ridge line, and various other patch repairs) appears to have been completed to a good standard (posting days after completion). Mitchell and his team were polite, conscientious and happy to help throughout the job.
Fixed the roof, including all the felting and repaired the chimney. - Good communication throughout. Good work. Very happy with the service.
Roof repair - Great, really friendly and nice team
Tile realignment/repair and felt renewal - Mitchell and his team were excellent. Would definitely recommend Alliance. The team were on time (in fact they were able to begin the job half a day earlier than initially discussed), polite, efficient and kept us informed of progress each day. We could not have asked for a better service.

Clear inspections and honest advice, so you know exactly where you stand before any work starts.

Clear inspections and honest advice, so you know exactly where you stand before any work starts.
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Straightforward written quotes and sensible scheduling, with no last-minute surprises.
Frequently Asked Questions
Lifespan depends on the system installed and the quality of workmanship. EPDM and GRP systems can last decades when installed correctly, while felt systems vary depending on exposure and maintenance.
If the structure is sound and issues are isolated, repairs can be effective. If leaks are recurring or materials are failing across the roof, replacement is usually the better long-term option.
Ponding is usually caused by poor falls or deck movement. Left unaddressed, it increases wear on the roof covering and raises the risk of leaks.
Yes. Flat roofs can be insulated using warm or cold roof systems, improving energy efficiency and comfort when installed correctly.
Yes. If water is entering the property, we prioritise making the roof safe and watertight before completing permanent repairs.
Flat roofs are commonly used on extensions and are a practical choice when designed and installed properly with the right system.

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