Flat Roofing in Oxford
We provide professional flat roof installation, repairs, and replacements across Oxford, working on residential and commercial properties with a clear focus on long-term performance, weather protection, and proper workmanship.
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Flat Roofing Services in Oxford
Our Services
About Our Flat Roofing Work in Oxford
Flat roofs demand a higher level of attention than pitched roofs, especially on older properties and extensions common throughout Oxford. Many flat roof problems we see are the result of poor detailing, incorrect materials, or inadequate drainage. Our approach is based on experience, not assumptions, and every recommendation is backed by a clear inspection and practical reasoning.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Work With
Different properties require different flat roofing systems. We guide homeowners through the pros and cons of each option so the final choice suits both the building and the budget.
EPDM Rubber Roofing
EPDM is a durable and flexible flat roofing system suited to many residential and commercial properties in Oxford. It performs well in changing temperatures and offers excellent resistance to cracking and UV exposure. When installed correctly, EPDM provides a clean finish with minimal maintenance requirements.
GRP Fibreglass Roofing
GRP fibreglass roofing creates a seamless, rigid surface that is ideal for areas with frequent foot traffic or complex detailing. It offers a strong, long-lasting finish but must be installed under the right conditions. We only recommend GRP where the structure and environment are suitable.
Torch-On Felt Roofing
Torch-on felt roofing remains a reliable option when installed using modern multi-layer systems. This type of flat roof is cost-effective and well suited to garages and extensions. Correct layering and secure detailing are essential to prevent premature failure.
Liquid Roofing Systems
Liquid roofing systems are useful for complex roof shapes or areas where traditional coverings are difficult to install. They form a seamless waterproof membrane when applied correctly. Preparation is critical, and we only use liquid systems where they offer genuine long-term benefits.
Why Flat Roofs Fail and How We Prevent It?
Most flat roof failures are avoidable. Poor drainage, unsuitable materials, and rushed installation are the main causes of leaks and water damage. By assessing the structure properly and choosing the right system from the start, we help homeowners across Oxford avoid repeated repairs and unnecessary costs.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Local homeowners trust us for reliable flat roofing work carried out to a high standard
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 take the time to inspect your flat roof properly before advising on the best solution, ensuring you receive honest guidance rather than a sales-driven recommendation.

After inspection, we provide a clear written quote and agree a schedule that works around you, with no pressure and no hidden costs.
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Every job is completed with final checks to ensure the roof is fully watertight, secure, and finished to a professional standard.
Frequently Asked Questions
A properly installed flat roof can last anywhere from 20 to 40 years depending on the system used, maintenance, and exposure to the elements.
This depends on the age and condition of the roof. Minor defects can often be repaired, but widespread damage or recurring leaks usually indicate replacement is the better option.
Common causes include poor drainage, failed seams, damaged coverings, and incorrect installation methods.
Yes, when designed correctly with proper drainage. Issues arise when water is allowed to pool due to blocked outlets or poor fall design.
Most flat roof installations or replacements are completed within one to three days, depending on size and complexity.
Yes, we provide emergency flat roof repair services to make roofs watertight and prevent further damage.

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