Flat Roofing in Thame
From leaking garage roofs to full flat roof replacements, we provide reliable flat roofing services across Thame, OX9, with clear advice, tidy workmanship, and repairs that last in real conditions.
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Flat Roof Repair and Installation in Thame
Our Services
Experienced Flat Roofers in Thame
Flat roofs fail for predictable reasons, poor drainage, weak detailing, ageing materials, or rushed repairs. Our approach is simple. We inspect the roof properly, explain what’s going on in plain terms, and carry out work that solves the issue rather than postponing it.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Options in Thame
Different flat roof systems suit different buildings. We recommend the right option based on roof size, access, drainage, and how long you want the roof to perform reliably.
EPDM Rubber Roofing
EPDM rubber roofing is flexible, durable, and well suited to the UK climate. It performs particularly well on larger flat roofs and extensions, handling movement without splitting when installed with proper detailing.
GRP Fibreglass Roofing
GRP fibreglass creates a seamless, hard-wearing surface that works well on garages and smaller flat roofs. Correct preparation is essential, which is why we focus on solid decking, clean trims, and correct curing during installation.
Torch-On Felt Roofing
Modern torch-on felt systems remain a dependable option when installed in layers with strong laps and edge protection. Felt offers good value and is often repairable if damage is addressed early.
Liquid Roofing Systems
Liquid-applied systems are useful for complex roof shapes or areas with multiple penetrations. Once cured, they form a seamless waterproof layer that can extend the life of an existing flat roof when used correctly.
Why Flat Roofs in Thame Develop Leaks?
Most flat roof leaks begin at weak points rather than the centre of the roof. Poor drainage, failed edges, rooflight detailing, and standing water are common causes. Proper inspection and correct repairs stop repeat issues and internal damage.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Clear advice, reliable workmanship, and repairs that actually solve the problem
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.

We start by inspecting the roof properly so recommendations are based on facts, not assumptions.

You receive a clear written quote and an agreed schedule, with no vague pricing or pressure.
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We complete the work, check all joins and outlets, 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 and maintained correctly.
If damage is localised and the rest of the roof is sound, repairs can be effective. If leaks are widespread or the structure is failing, replacement is usually the better long-term solution.
Flat roofs should still have a slight fall for drainage. Pooling usually indicates incorrect falls, deck movement, or blocked outlets, all of which should be inspected promptly.
Yes. Flat roof replacement is often the best time to upgrade insulation, especially on extensions or living spaces where heat retention matters.
A professional inspection every 1 to 2 years is sensible, and after severe weather. Early checks help prevent costly internal damage.
Yes. If water is getting in, we can attend to make the roof safe and stop further damage before carrying out a permanent repair.

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