Trusted flat roofing specialists serving Oxford and the surrounding areas

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

From new flat roof installations to targeted repairs and emergency call-outs, we handle every aspect of flat roofing for properties across Oxford.

Flat Roof Installation

We install flat roofs for extensions, garages, dormers, bay roofs, and commercial buildings across Oxford. Every installation is planned around the structure of the building, drainage requirements, and how the roof will actually be used. We do not take a one-size-fits-all approach, as flat roofs fail quickly when the wrong system is chosen or corners are cut during installation.
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Flat Roof Replacement

If your existing flat roof is reaching the end of its lifespan, replacement is often the most cost-effective option long term. We assess the condition of the decking, insulation, and drainage before recommending a full replacement, ensuring the new system is suitable for Oxford’s weather conditions and will remain watertight for years to come.
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Flat Roof Repairs

If your existing flat roof is reaching the end of its lifespan, replacement is often the most cost-effective option long term. We assess the condition of the decking, insulation, and drainage before recommending a full replacement, ensuring the new system is suitable for Oxford’s weather conditions and will remain watertight for years to come.
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Flat Roof Inspections

Regular inspections can prevent minor defects from turning into expensive repairs. We provide flat roof inspections across Oxford to check for early signs of failure such as blistering, cracking, weak joints, or drainage issues. Our inspections are practical and honest, giving you clear advice on whether repairs or replacement are actually needed.
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Emergency Flat Roof Repairs

When a flat roof starts leaking, quick action matters. We offer emergency flat roof repairs in Oxford to limit water damage and protect the structure of your property. Our priority is to make the roof safe and watertight, followed by clear guidance on any permanent repairs required.
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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.

Checkatrade Verified reviewer - Job location: SL3

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

Checkatrade Verified reviewer - Job location: SL3

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.

Checkatrade Verified reviewer - Job location: SL9

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.

Checkatrade Verified reviewer - Job location: SL4

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.

Checkatrade Verified reviewer - Job location: SL6

Replacement of flat roof - Mitchell and his team are smart, communicative, skilled, friendly, helpful, trustworthy and reliable. I would highly recommend their roofing services.

Checkatrade Verified reviewer - Job location: HP4

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

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL6

Fixed the roof, including all the felting and repaired the chimney. - Good communication throughout. Good work. Very happy with the service.

Checkatrade Verified reviewer - Job location: SL6

Roof repair - Great, really friendly and nice team

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: HP13

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.

Checkatrade Verified reviewer - Job location: HP16

Leak in the roof- Very polite and professional. Job was completed professionally at a very good price. Would highly recommend

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL9

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.

Checkatrade Verified reviewer - Job location: SL6

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

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL6

Fixed the roof, including all the felting and repaired the chimney. - Good communication throughout. Good work. Very happy with the service.

Checkatrade Verified reviewer - Job location: SL6

Roof repair - Great, really friendly and nice team

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL6
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Our Process
Inspection and advice

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.

Clear quote and scheduling

After inspection, we provide a clear written quote and agree a schedule that works around you, with no pressure and no hidden costs.

Installation, repair, and final checks

Every job is completed with final checks to ensure the roof is fully watertight, secure, and finished to a professional standard.

[FAQ]

Frequently Asked Questions

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Do you offer emergency flat roof repairs in Oxford?
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