Flat Roofing in Abingdon-on-Thames
We provide flat roof repairs, replacements, and new installations across Abingdon-on-Thames, helping homeowners and businesses deal with leaks, ageing roof coverings, and poorly installed flat roofs that no longer perform as they should.
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Flat Roofing Services in Abingdon-on-Thames
Our Services
Flat Roofing Experience You Can Rely On in Abingdon-on-Thames
Flat roofs in Abingdon-on-Thames often fail due to age, poor original installation, or unsuitable materials being used in the past. We regularly work on roofs where shortcuts were taken or drainage was never properly considered. Our approach is based on inspection first, clear explanation second, and only recommending work that genuinely improves the roof’s performance.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Work With
Different flat roof systems suit different properties. We help you understand the options and recommend a solution based on durability, budget, and the demands placed on the roof.
EPDM Rubber Roofing
EPDM rubber roofing is a popular choice for flat roofs in Abingdon-on-Thames due to its flexibility and resistance to cracking. It performs well in varying temperatures and is well suited to larger roof areas where a clean, low-maintenance finish is needed.
GRP Fibreglass Roofing
GRP fibreglass roofing creates a seamless, rigid surface that works well on flat roofs with complex detailing or areas that require occasional access. Correct preparation is essential, and when installed under the right conditions, GRP offers strong water resistance and durability.
Torch-On Felt Roofing
Modern torch-on felt systems remain a dependable option for garages and extensions. When installed using multi-layer methods with proper edge detailing, felt roofing provides solid protection and good value for money over its lifespan.
Liquid Roofing Systems
Liquid roofing systems are ideal for flat roofs with awkward shapes, multiple penetrations, or limited access. They form a continuous waterproof layer, but only perform well when the underlying surface is properly prepared and stable.
Why Flat Roof Issues Are Common on Older Properties?
Many flat roof problems develop gradually rather than overnight. Small defects, standing water, or poorly executed past repairs can slowly weaken the roof until leaks appear inside. Addressing these issues early helps avoid repeated damage and unnecessary expense later on.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Customers choose us for straightforward advice, reliable workmanship, and flat roofs that do what they are meant to do
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 an inspection so we can explain the condition of your flat roof and recommend the most sensible next step.

You’ll receive a clear written quote and a proposed schedule, with the work explained properly before anything goes ahead.
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All work is finished with final checks to ensure the roof is watertight, secure, and left clean and tidy.
Frequently Asked Questions
A well-installed flat roof can last between 20 and 40 years depending on the system used, exposure to the elements, and ongoing maintenance.
Common causes include failed joints, surface cracks, blocked outlets, and poor drainage that allows water to sit on the roof for extended periods.
Yes, in many cases. If the damage is localised and the rest of the roof is sound, repairs can be effective. If issues are widespread, replacement is usually more reliable.
EPDM is well suited to many residential flat roofs due to its flexibility, durability, and low maintenance requirements.
Yes. We inspect the flat roof before providing a quote so recommendations are based on the roof’s actual condition.
Yes. We provide emergency flat roof repairs to stop leaks and prevent further damage while advising on any permanent repairs needed.

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