Flat Roof Installation, Repairs & Replacement in Woking
Straightforward flat roofing in Woking for garages, extensions, dormers and outbuildings, done properly with clear advice, tidy work, and a roof that stays watertight.
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Flat Roofing Services in Woking
Our Services
About Our Flat Roofing Work in Woking
We carry out flat roofing across Woking on garages, extensions, bays, dormers and small commercial roofs. You’ll get clear communication, a written quote, and a team that turns up when they say they will. We keep the job tidy, protect your property, and finish the details properly so the roof does its job.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Install in Woking
Different buildings need different systems. We’ll help you choose based on lifespan, budget, appearance, and how the roof is used.
EPDM Rubber Roofing
EPDM is a flexible rubber membrane that copes well with temperature changes and resists cracking. It’s a strong option for garages and extensions in Woking where you want low maintenance and a clean finish. Installed properly with good trims and drainage, it’s a reliable long-term system.
GRP Fibreglass Roofing
GRP creates a hard-wearing, seamless surface with a smart finish. It’s ideal where occasional access is needed, like reaching rooflights or maintaining gutters. With strong edging and clean detailing, GRP is a solid choice for many Woking homes.
Torch-On Felt Roofing
Modern torch-on felt is installed as a multi-layer system and is far more dependable than older felt roofs. It offers good value and durable waterproofing for garages, sheds and extensions, especially where you want a practical solution without paying for premium systems.
Liquid Flat Roofing Systems
Liquid systems are useful where the roof has awkward corners, multiple upstands, or tricky junctions. The coating forms a continuous waterproof layer, helping reduce weak points around details. It can also be suitable for refurbishments in some cases, depending on the condition of the existing roof.
Why Homeowners in Woking Choose Us?
Homeowners choose us because we keep it simple, honest advice, clear quotes, and flat roofing work done properly. We take the time to get the details right, so you’re not dealing with the same leak again next month.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
What local customers say about our flat roofing work in Woking
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.

Clear inspections and honest advice, so you understand the problem and your options before committing to work.

Clear quotes and sensible scheduling, with straightforward timelines and no surprise add-ons.
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Careful installation, repairs and final checks, so the roof is properly sealed, finished neatly, and left watertight.
Frequently Asked Questions
It depends on the system and the quality of installation. EPDM and GRP can last decades when fitted correctly, while felt systems vary based on exposure, drainage and maintenance.
Common causes include failed seams, cracked coverings, poor edge detailing, blocked outlets, ponding water, and leaks around rooflights or upstands.
Often, yes. If the structure is sound and the damage is localised, a targeted repair can be the right fix. If the roof is failing across multiple areas, replacement is usually the smarter option.
Pooling is usually caused by poor falls, deck movement, or drainage issues. Over time it speeds up wear and increases the chance of leaks, so it’s worth addressing early.
Yes. We regularly work on flat roofs for extensions, garages, dormers, porches and outbuildings across Woking, including new installations and repairs.
Yes. If you have active leaking or storm damage, we can advise immediately and prioritise making the roof safe and watertight, then return to complete the permanent repair.

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