Flat Roofing Brixton
Flat roof installation, replacement and flat roof repairs in Brixton, SW9, for extensions, garages, dormers and residential properties across South London.
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Flat Roofing Services in Brixton
Our Services
About Our Flat Roofing
Flat roofs are common around Brixton, especially on rear extensions, garages and dormers. Most failures come from rushed detailing, bad falls, or weak edges. We focus on the parts that stop leaks long-term, drainage, joints, outlets and finishing, so your roof performs properly in real weather, not just on install day.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Offer
Different buildings need different systems. We install and repair several flat roofing options in Brixton, and we’ll recommend what fits your roof and budget.
EPDM Rubber Roofing
EPDM rubber roofing is a strong choice for many Brixton flat roofs, especially larger extension and garage roofs. It stays flexible, handles temperature changes well, and gives reliable waterproofing when fitted with proper edge details.
GRP Fibreglass Roofing
GRP fibreglass roofing creates a neat, seamless finish, which makes it a great option for smaller roofs like dormers and porches. It’s tough, tidy-looking, and ideal when you want a clean finish that stays watertight.
Torch-On Felt Roofing
Torch-on felt can still be a solid system when installed properly using a multi-layer build. We take extra care around corners, edges and outlets, because that’s where cheap felt jobs usually fail first.
Liquid Roofing Systems
Liquid roofing systems work well on awkward shapes, roof penetrations, and details where sheet materials struggle. Applied as a seamless coating, they create a continuous waterproof layer and can be ideal for repair situations.
Why Brixton Homeowners Choose Us?
People in Brixton want straight answers, clean work, and no mess left behind. We explain what’s wrong, what it takes to fix, and what it will cost, then we do the job properly. No vague “it should be fine” advice, and no pressure tactics.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Customers usually mention the same things, clear communication, tidy workmanship, and repairs that actually stop the leak.
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, including edges, flashings, outlets and the membrane condition, then explain your options clearly.

You get a clear written quote and a realistic timeline. If the issue is urgent, we prioritise the repair and keep you updated.
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Once the work is complete, we check the critical points again, joints, drainage, edges and upstands, then confirm everything is sealed and finished correctly.
Frequently Asked Questions
It depends on the system and how well it was installed. Many felt roofs last around 10 to 15 years, while EPDM and GRP can last much longer when fitted properly and maintained.
If the leak is local and the roof is in good condition, a repair can be enough. If there are repeated leaks, widespread cracking, lifting edges, or soft decking, replacement is usually the smarter long-term fix.
Common signs include bubbling, splits, cracks, loose edges, pooling water, damp smells, or stains on ceilings. Even small defects can let water in over time.
Yes. If the roof build allows it, upgrading insulation during a replacement can improve comfort and reduce heat loss, especially on extensions.
Yes. If there’s active water ingress and it’s safe to access, we can carry out urgent repairs or temporary weatherproofing, then return to complete a permanent fix.
Yes. We provide free quotes and clear advice, so you can make a decision without any pressure.

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