Experienced flat roof specialists serving Abingdon-on-Thames and nearby areas

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

From worn garage roofs to failing extension roofs and commercial flat roofing issues, we deliver practical flat roofing solutions designed to cope with everyday use and changing weather conditions.

Flat Roof Installation

We install flat roofs on extensions, garages, porches, dormers, and commercial buildings throughout Abingdon-on-Thames. Every installation starts with checking the structure, ensuring proper falls for drainage, and selecting a system that suits how the roof will be used. Done right, a flat roof should be reliable, low maintenance, and built to last.
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Flat Roof Replacement

When a flat roof has been repaired multiple times or shows signs of widespread failure, replacement is often the most sensible route. We remove the old system, inspect the deck beneath, correct drainage issues, and install a new flat roof that offers long-term protection rather than short-term fixes.
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Flat Roof Repairs

Flat roof repairs in Abingdon-on-Thames often involve dealing with splits in the covering, lifting edges, failed joints, or water pooling after rainfall. Our repair work focuses on addressing the cause of the problem so the same issue does not keep returning. If a repair is viable, we’ll carry it out properly. If it isn’t, we’ll explain why.
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Flat Roof Inspections

Flat roofs benefit from periodic inspections, especially after heavy rain or colder months. We inspect flat roofs in Abingdon-on-Thames to identify early signs of deterioration such as surface wear, trapped moisture, weak outlets, or poor detailing before they lead to leaks inside the property.
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Emergency Flat Roof Repairs

If a flat roof starts leaking unexpectedly, quick action helps prevent further damage. We provide emergency flat roof repairs in Abingdon-on-Thames to secure the roof, stop water ingress, and stabilise the situation before carrying out any necessary follow-up work.
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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.

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

Every job starts with an inspection so we can explain the condition of your flat roof and recommend the most sensible next step.

Clear quote and scheduling

You’ll receive a clear written quote and a proposed schedule, with the work explained properly before anything goes ahead.

Installation, repair, and final checks

All work is finished with final checks to ensure the roof is watertight, secure, and left clean and tidy.

[FAQ]

Frequently Asked Questions

How long should a flat roof last?
What causes most flat roof leaks?
Can flat roofs be repaired instead of replaced?
Is EPDM suitable for residential flat roofs?
Do you inspect the roof before quoting?
Do you offer emergency flat roof repairs in Abingdon-on-Thames?
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