Flat Roofing in Bicester
We provide flat roof repairs, replacements and new installations across Bicester, OX26, focusing on long-term performance, proper drainage, and workmanship that stands up to real weather.
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Flat Roof Repair and Installation in Bicester
Our Services
Flat Roofing Built for Bicester Properties
Flat roofs fail when corners are cut. Poor falls, rushed detailing, and unsuitable materials lead to repeat problems. Our approach is practical and straightforward, assess the roof properly, explain the options clearly, and carry out work that lasts rather than work that needs revisiting.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Install
Different flat roof systems suit different buildings. We help you choose based on roof size, access, budget, and how long you expect the roof to perform reliably.
EPDM Rubber Roofing
EPDM rubber roofing is a popular option for flat roofs due to its flexibility and resistance to cracking. When installed correctly, it handles temperature changes well and suits both residential and commercial buildings.
GRP Fibreglass Roofing
GRP fibreglass roofing creates a seamless, rigid finish that works well on garages, dormers, and smaller flat roofs. Correct preparation and curing are essential, which is why experience matters with this system.
Torch-On Felt Roofing
Modern torch-on felt systems remain a reliable and cost-effective choice when installed in proper layers with secure edge detailing. Felt roofs are also repairable when issues are caught early.
Liquid Roofing Systems
Liquid-applied systems are useful where roof shapes are complex or penetrations make sheet systems impractical. Once cured, they form a continuous waterproof surface that protects existing structures.
Common Causes of Flat Roof Problems in Bicester
Most flat roof issues come from standing water, failed edges, or poor detailing around rooflights and outlets. Identifying these early and fixing them correctly prevents internal damage and repeated repair costs.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Honest advice, clear communication, and flat roofing work done properly
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.

Every job starts with a proper inspection and straightforward advice on the best way forward.

You receive a clear written quote and realistic timescales before any work begins.
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We complete the work carefully, check all vulnerable areas, and leave the site clean and safe.
Frequently Asked Questions
Lifespan depends on the system and installation quality. Felt roofs often last 10 to 20 years, while EPDM and GRP systems can last 20 to 40 years when installed correctly.
Many repairs can be carried out year-round, depending on weather conditions and materials. Emergency repairs are always possible to prevent further damage.
Repeat leaks usually mean the root cause was not addressed. Poor drainage, failed edges, or hidden deck issues often need more than surface repairs.
Most flat roof replacements are completed efficiently with minimal disruption. We plan work carefully to keep buildings weatherproof throughout the process.
Yes. Periodic inspections help spot early signs of wear, blocked outlets, or damage before leaks develop.
Yes. If water is entering the property, we can attend quickly to make the roof safe and stop further damage.

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