Flat Roofing in Woodstock
If your flat roof is leaking, bubbling, or holding water after rain, we can help. We provide flat roof repairs, replacements, and new installations across Woodstock, with a focus on doing the job properly so you are not dealing with the same issue again in six months.
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Flat Roofing Services in Woodstock
Our Services
Flat Roofing Work in Woodstock, Done Properly
Woodstock has a mix of older properties, newer extensions, and flat-roofed garages where poor historic installation can cause recurring issues. We see the same problems again and again, cracked coverings, weak joins, blocked drainage, and roofs that were never given the correct fall. Our approach is built around identifying why the roof failed, then putting in the right fix so it holds up long term.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roof Systems We Install and Repair
Not every flat roofing material suits every roof. We’ll explain your options clearly, then recommend a system that fits the roof type, the level of foot traffic, and how long you want it to last.
EPDM Rubber Roofing
EPDM is a strong choice for many flat roofs in Woodstock because it handles temperature changes well and stays flexible over time. It’s particularly good for larger, simpler roof areas where you want a clean finish and low maintenance. Installed correctly, it offers excellent weather resistance and long-term reliability.
GRP Fibreglass Roofing
GRP works well where you need a tough, seamless finish, especially on roofs that see occasional foot traffic or have awkward detailing. The key is correct preparation and installation conditions. Done properly, GRP provides a solid surface that resists water ingress and stands up well over time.
Torch-On Felt Roofing
Torch-on felt remains a popular option for garages and extensions because it’s cost-effective and reliable when installed using modern multi-layer systems. The difference between a felt roof that lasts and one that fails early usually comes down to detailing at the edges and correct bonding between layers.
Liquid Roofing Systems
Liquid systems are useful for roofs with lots of penetrations, awkward shapes, or areas where seamless waterproofing is the best route. Preparation matters more than anything with liquid systems. If the base is not sound, the finish will not last. When used in the right scenario, it’s a very effective solution.
Why Flat Roof Problems Keep Coming Back?
A lot of flat roof issues aren’t caused by one big event, they’re caused by small weaknesses that are ignored or patched badly. Pooling water after rainfall, weak joins at edges, or repairs that were applied without fixing the underlying problem usually lead to repeat leaks. We focus on stopping the cycle, not feeding it with endless call-outs.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Homeowners choose us because we turn up, explain things clearly, and leave them with a roof they can trust
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 don’t quote blindly. We inspect the roof, explain what we’ve found in plain English, and recommend the right solution based on what the roof actually needs.

You’ll get a clear quote with the work outlined properly, then we’ll agree a date that works for you. No vague pricing, no pressure, and no surprises.
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Every job finishes with proper final checks, watertight detailing, and a tidy site. The goal is that you don’t need to think about your roof again once we’re done.
Frequently Asked Questions
If leaks keep returning, the surface is cracking or bubbling, or water is pooling after rainfall, repairs may only be a short-term fix. We’ll inspect the roof and tell you honestly whether repair makes sense or replacement is the better investment.
The usual causes are failed seams or joints, worn edges, splits in the covering, blocked outlets, and poor falls that let water sit on the roof for too long.
Many repairs can be completed in a single visit, depending on access and the extent of the damage. If the roof needs more involved work, we’ll explain the timeline upfront.
Not always. EPDM is excellent for durability and flexibility, while felt can be a strong option when a multi-layer system is installed properly. The best choice depends on the roof design, budget, and how long you want the system to last.
In many cases, yes, but it depends on the weather conditions and the roofing system needed. We’ll advise what’s safe to do immediately and what’s better scheduled when conditions improve.
Yes. If your roof is leaking or storm damage has caused immediate issues, we can attend to make it watertight and prevent further damage, then advise on any follow-up work required.

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