Flat Roofing in Wallingford
From older garage roofs to modern extensions, we install and repair flat roofs across Wallingford, OX10, with clean detailing, honest advice, and work that holds up in real weather.
Enquire now














Wallingford Flat Roof Repair and Installation
Our Services
Expert Flat Roofers in Wallingford
Wallingford has a mix of older properties, newer developments, garages, outbuildings and extensions, and flat roofs behave differently on each. We don’t guess. We inspect, explain what’s going on, and carry out the work with proper materials and tidy finishing details around edges, outlets, and joins.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Options in Wallingford
We’ll recommend a system based on your roof, not what’s easiest to sell. That includes how the roof drains, whether it needs to take foot traffic, and how long you want the result to last.
EPDM Rubber Roofing Wallingford
EPDM is a flexible rubber membrane that suits many flat roofs because it handles movement well and resists splitting. It’s a solid choice for garages, extensions, and larger flat areas when installed with clean detailing and proper sealing.
GRP Fibreglass Roofing Wallingford
GRP gives a seamless, hard-wearing finish that works well on smaller roofs and areas where you want a crisp edge detail. It’s ideal for many extensions and garages, as long as the base is prepared properly and the system is installed in the right conditions.
Felt Flat Roofing Wallingford
Modern felt systems are still a dependable option. Installed in layers with correct laps, trims and heat bonding, felt provides a practical balance of durability and value, and it’s often repairable if damage is caught early.
Industrial Flat Roofing in Wallingford
We also work on commercial and industrial flat roofs in Wallingford, including offices, storage units and larger roof spans. These jobs need careful planning, safe access, and materials suited to bigger surfaces and heavier exposure. We install, repair, and maintain industrial flat roofs with minimal disruption.
Why Flat Roofs in Wallingford Start Leaking
Leaks usually start at the weak points, edges, joins, rooflights, and outlets. Another common issue is ponding water, which speeds up wear and finds its way through poor detailing. The fix is rarely “more sealant”. The fix is correct diagnosis and correct repair.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Straight answers, clean work, 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 inspect the roof properly and tell you what’s going on, no vague guesses, no hard sell.

You get a clear quote and a realistic plan for getting the work done with minimal disruption.
.png)
We finish with checks on edges, joins, outlets and flashings, then leave the site tidy.
Frequently Asked Questions
It depends on the system and how well it’s installed. Felt often lasts 10 to 20 years, while EPDM and GRP commonly last 20 to 40 years when installed correctly and looked after.
Not when they’re built properly. Most flat roof leaks come from poor drainage, weak detailing, or rushed repairs. A flat roof with proper falls, clean joins, and correct edge work can be very reliable.
Flat roofs are ideal for extensions and garages, can be cost-effective, and they make adding rooflights easier. They can also be simpler to access for inspections and maintenance, as long as it’s done safely.
Yes, as long as the roof structure can take the load and the mounting system is suitable. It’s best to have the roof inspected first, installing panels on a failing roof is asking for trouble.
It depends on the roof. GRP suits many smaller roofs where you want a seamless finish. Felt can be a great value option and is often easier to repair. The “best” choice depends on the roof shape, drainage, and budget.
Keep outlets clear, remove debris after storms, and watch for lifting edges or bubbling. A professional inspection every 1 to 2 years is sensible, and sooner if you’ve had leaks or storm damage.

.png)
.png)
.png)
.png)
