Flat Roofing Wimbledon
Flat roof installation, replacement, and repair in Wimbledon SW19 and SW20. Built for extensions, dormers, garages, and terraces, with proper falls, neat edges, and waterproof detailing you can trust.
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Flat Roofing Services in Wimbledon
Our Services
About Our Flat Roofing Work
Wimbledon properties range from period terraces to modern flats and extensions, and flat roofs here vary massively in build-up and detailing. We work across domestic and commercial flat roofs, focusing on the parts that actually prevent failure, proper drainage, clean edge finishing, and watertight junctions around rooflights and walls. The aim is simple, do the work once, and do it properly, so you are not calling someone again in the next downpour.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roof Systems We Install in Wimbledon
We install several proven flat roofing systems and recommend the right option based on roof size, exposure, access, and how you use the space.
EPDM Rubber Roofing Wimbledon
EPDM is a strong rubber membrane that suits many extension roofs and garages across Wimbledon. It handles temperature changes well, stays flexible over time, and is low maintenance when installed with the right trims and sealed details. It’s a good choice if you want long-term waterproofing without constant upkeep.
GRP Fibreglass Roofing Wimbledon
GRP creates a seamless, joint-free finish that works well on balconies, walk-on areas, and flat roofs where appearance matters. With correct formation at edges and outlets, it provides a tough waterproof surface and a neat, modern look that suits many renovated homes and extensions.
Torch-On Felt Roofing Wimbledon
Torch-on felt is a layered system that remains popular for a reason, it’s reliable when installed correctly. It suits traditional flat roof structures and offers strong waterproofing at a sensible cost, especially where a robust, proven method is preferred.
Liquid Flat Roofing Wimbledon
Liquid systems are ideal for roofs with awkward detailing, multiple penetrations, or refurbishment work where an overlay may be appropriate. The coating cures into a seamless waterproof layer, reducing weak points and making it a practical option for complex shapes and tricky junctions.
Why Wimbledon Homeowners Choose Us?
People in Wimbledon want straight answers and work that holds up. We inspect properly, explain the options clearly, and keep the site tidy. No pressure, no scare tactics, and no pointless patching when the roof needs more than that. Just practical advice, good materials, and careful finishing, so your flat roof performs the way it should.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Customers choose us for clear communication, reliable timing, and flat roofing work that looks clean and stays watertight.
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 assess the roof surface, drainage, edges, and junctions, then tell you what’s worth repairing and what isn’t.

You receive a clear written quote with scope, timings, and what’s included, so there are no surprises later.
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You receive a clear written quote with scope, timings, and what’s included, so there are no surprises later.
Frequently Asked Questions
If the leak is localised and the structure is sound, repairs are often fine. If you have repeated leaks, soft spots, widespread cracking, or lots of old patching, replacement is usually the safer long-term option.
It depends on the roof size and detailing. EPDM is a strong low-maintenance option, GRP works well where a seamless finish matters, and felt can be ideal on traditional builds when installed properly.
Yes. Replacement is the best time to upgrade insulation and reduce heat loss, especially on older extensions that were built with minimal thermal performance.
They shouldn’t. Standing water usually means poor falls, blocked outlets, or a badly designed roof. A properly installed flat roof guides water to the correct drainage points.
Many domestic flat roofs can be completed within a few days, depending on access, weather, and whether any deck repairs are needed.
Yes. Workmanship is guaranteed, and manufacturer-backed warranties may apply depending on the system used and the installation spec.

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