Trusted Flat Roofing Specialists in Wimbledon

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

From small leak repairs to full flat roof replacements, we deliver dependable flat roofing in Wimbledon with clear advice, tidy work, and materials suited to your property.

Flat Roof Installation in Wimbledon

Wimbledon has a lot of rear extensions, dormers, and modern refurbishments, which makes flat roofing a common requirement across the area. A flat roof only performs well when the structure is prepared properly and water is guided to the right drainage points. We install flat roofs with the correct falls, secure deck prep, and proper edge detailing, so the roof looks clean and stays watertight through heavy rain and seasonal movement. Whether it’s a new extension roof or replacing an old structure, we’ll recommend a system that fits the size, access, and long-term maintenance needs.
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Flat Roof Replacement Wimbledon

If your flat roof has repeated leaks, soft spots underfoot, bubbling, or patch repairs that keep failing, replacement is usually the smart move. We replace flat roofs in Wimbledon by stripping back to sound layers, checking the deck condition, upgrading insulation where needed, and installing a new waterproof system to current standards. You end up with a roof that’s built properly from the base up, not a cosmetic fix that buys you a few months.
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Flat Roof Repairs Wimbledon

Most flat roof leaks in Wimbledon come from weak junctions, worn seams, cracked coverings, or water sitting where it shouldn’t. We don’t guess based on internal staining, we inspect the surface, edges, outlets, and any rooflights to find the true entry point. If a repair is viable, we’ll keep it focused and durable. If the roof is too far gone, we’ll be blunt about it and explain why replacement is the better investment.
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Flat Roof Inspections in Wimbledon

A proper inspection tells you what’s actually happening on the roof, not what someone thinks is happening. We check drainage, membrane condition, edge trims, upstands, rooflight junctions, and signs of trapped moisture. You get a clear summary of what needs attention now, what can wait, and what would be a waste of money to repair.
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Emergency Flat Roof Repair Wimbledon

When water is getting in, the priority is stopping damage fast. We provide emergency flat roof repairs in Wimbledon to secure the roof and prevent further internal issues. That can include sealing a split, reinforcing a failed junction, securing loose edges, or applying a temporary waterproof layer until a permanent repair is completed. You’ll know exactly what’s temporary and what needs a proper follow-up, no vague talk.
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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.

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
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Our Process
Inspection and advice

We assess the roof surface, drainage, edges, and junctions, then tell you what’s worth repairing and what isn’t.

Clear quote and scheduling

You receive a clear written quote with scope, timings, and what’s included, so there are no surprises later.

Installation, repair, and final checks

You receive a clear written quote with scope, timings, and what’s included, so there are no surprises later.

[FAQ]

Frequently Asked Questions

How do I know if my flat roof in Wimbledon needs repair or replacement?
Which flat roofing system is best for an extension roof?
Can you improve insulation when replacing a flat roof?
Do flat roofs always have standing water?
How long does flat roofing work usually take?
Do you provide guarantees on flat roofing work?
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