Trusted flat roofing in Wallingford, repairs, replacements and new installs

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.

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Wallingford Flat Roof Repair and Installation

We handle flat roof leaks, damaged felt, failing joins, ponding water, and full replacements, with a clear quote upfront and a tidy finish once the job’s done.

Flat Roof Installation

A good flat roof starts underneath the covering. We check the deck, form proper falls, and finish edges and outlets properly so water moves off the roof the way it should. That’s what stops the usual call-backs.
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Flat Roof Replacement

If the roof has been patched over and over, or you’ve got soft spots and persistent leaks, replacing the system is often the sensible move. We strip it back, deal with what’s causing the failure, then install a new flat roof built for long-term use.
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Flat Roof Repairs

Most flat roof issues in Wallingford come down to weak seams, lifting edges, split coverings, poor flashing, or blocked drainage. We find the cause first, then repair it properly so you’re not paying twice.
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Flat Roof Inspections

Not every problem shows up as a drip. Bubbling, cracks, staining, or water sitting after rainfall are all signs the roof needs a closer look. A quick inspection now can stop a small issue turning into internal damage.
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Emergency Flat Roof Repairs in Wallingford

If water is getting in, you need action, not promises. We carry out emergency flat roof repairs in Wallingford to stop active leaks fast, then talk you through the right permanent repair once things are safe and dry.
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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.

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
REVIEWS
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Our Process
Inspection and advice

We inspect the roof properly and tell you what’s going on, no vague guesses, no hard sell.

Clear quote and scheduling

You get a clear quote and a realistic plan for getting the work done with minimal disruption.

Installation, repair, and final checks

We finish with checks on edges, joins, outlets and flashings, then leave the site tidy.

[FAQ]

Frequently Asked Questions

How long do flat roofs typically last?
Are flat roofs more prone to leaks than pitched roofs?
What are the advantages of having a flat roof?
Can I install solar panels on a flat roof?
Is GRP fibreglass roofing better than felt roofing?
How do I maintain my felt roof and how often should it be inspected?
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