Flat Roofing Chesham
If your flat roof is leaking, blistering, pooling water, or past its best, we handle repairs and full replacements across Chesham with clear quotes and tidy workmanship.
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Flat Roofing Services in Chesham
Our Services
About Our Flat Roofing in Chesham
We’re a local roofing team covering Chesham and nearby areas, focused on flat roofing that holds up in real UK weather. We work on garages, extensions, porches, dormers, and small commercial roofs, and we keep things simple, straight advice, clear quotes, and work completed properly.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roof Systems We Install in Chesham
Different roofs suit different systems. These are the flat roofing options we regularly install and repair across Chesham.
EPDM Rubber Roofing in Chesham
EPDM is a durable rubber membrane with strong weather resistance and a clean finish. It’s a solid choice for many residential flat roofs because it handles temperature changes well and, when installed properly, keeps leaks at bay for years.
GRP Fibreglass Roofing in Chesham
GRP creates a tough, seamless surface that works well on flat roofs where you want a hard-wearing finish. It’s especially useful for smaller roofs with tricky edges, as the system can be formed neatly around details when installed correctly.
Torch-On Felt Roofing in Chesham
Torch-on felt is a reliable flat roofing option, fitted in bonded layers to create a strong waterproof barrier. It’s a popular choice for extensions and garages, and it performs well when the falls, edges, and joins are done properly.
Liquid Roofing Systems in Chesham
Liquid roofing systems form a seamless waterproof coating, ideal for flat roofs with awkward details and joints. Once cured, it creates a durable layer that helps prevent leaks and protects against standing water.
Why Chesham Homeowners Choose Us?
People call us because they want the leak sorted, the roof done properly, and no nonsense. We turn up when we say we will, explain the options clearly, and keep the job tidy. Whether it’s a repair or replacement, we focus on long-term results, not short-term patches.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Local reviews matter, because a flat roof is only as good as the installer. Our work is trusted by homeowners across Chesham and nearby areas.
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 check the roof properly, not from the ground and not with guesswork. You’ll get a clear explanation of what’s failed, what hasn’t, and whether a repair is sensible or a replacement will save you money long term.

You’ll get a straightforward quote that tells you what we’re doing and why. If you’re happy, we book a date that suits you, keep you updated, and turn up ready to work.
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We carry out the work with care and keep the site tidy. Once finished, we check edges, joins, drainage points, and sealing, so you know the roof is watertight before we leave.
Frequently Asked Questions
If it’s a single leak from a split, lifted edge, or failed join, a repair is often enough. If the roof is repeatedly leaking, has widespread blistering, soft spots, or poor drainage causing ponding, replacement is usually the safer option.
Common causes include cracked or split membranes, failed joins, blocked outlets, ponding water, and weak detailing around edges, skylights, and vents. Poor installation is also a big one, especially if the falls and upstands were done badly.
Many repairs can be completed the same day once we’ve assessed the issue. Larger repairs or jobs needing drying time can take longer, but we’ll tell you upfront what to expect and why.
Torch-on felt is a popular, proven option. EPDM is also a strong choice for many residential roofs. GRP works well on smaller roofs where you want a hard-wearing finish. The best option depends on your roof size, details, and how it drains.
Yes. If water is getting in, we prioritise urgent repairs where possible to stop the ingress, then advise on the correct permanent fix to prevent repeat issues.
Always. We inspect first, explain what we recommend, then provide a clear quote before any work goes ahead.

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