Flat Roofing Godalming
Need flat roofing in Godalming? We install, replace and repair flat roofs for extensions, garages and dormers across GU7, with honest advice, clear quotes, and workmanship that holds up.
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Flat Roofing Services in Godalming
Our Services
About Our Flat Roofing in Godalming
Flat roofs have a bad name for one reason, people cut corners. Most failures come from poor detailing at edges, weak joins, blocked outlets, or rushed prep. We take the time to get the foundations right, then finish the job properly so the roof stays watertight. If you’re based in Godalming or nearby villages, we’ll give you a clear plan, a clear quote, and work you can rely on.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roof Systems We Install in Godalming
We work with several flat roofing systems, then recommend what suits your roof layout, usage, and expected lifespan, rather than forcing a one-size-fits-all option.
EPDM Rubber Roofing
EPDM is a strong, flexible rubber membrane that performs well through temperature changes and heavy rain. It’s a great option for flat roofs on extensions, garages, and outbuildings in Godalming where you want a long-lasting, low-maintenance finish.
GRP Fibreglass Roofing
GRP creates a seamless, hard-wearing surface that looks clean and modern. It’s ideal for roofs where neat detailing matters, like dormers, porches and extensions. Installed correctly, GRP is highly resistant to leaks, cracking, and UV wear.
Torch-On Felt Roofing
Torch-on felt is still one of the most popular flat roof options because it delivers solid waterproofing at a sensible price. Modern multi-layer systems are far more durable than older felt roofs, especially when edges and outlets are finished properly.
Liquid Roofing Systems
Liquid systems work well for awkward shapes, tight corners, and roofs with lots of penetrations where sheet materials can struggle. They cure into a waterproof layer that seals around trims and details, which helps reduce common leak points.
Why Godalming Homeowners Choose Us?
Because you want a flat roof that stays watertight, not a “quick fix” that fails again next winter. We inspect properly, explain your options clearly, and quote honestly. We turn up when we say we will, keep the job tidy, and finish the details properly, especially edges, joins and drainage, where most flat roofs fail.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Real feedback from customers who trusted us with flat roof repairs and replacements in Godalming and the surrounding area.
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 flat roof properly, explain what’s causing the issue, and give you clear options based on the condition of the roof.

You get a clear written quote, a realistic timescale, and a booked date that does not keep shifting.
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We complete the work carefully, then check seals, edges and drainage so you can be confident the roof is watertight before we leave.
Frequently Asked Questions
If the problem is localised, the decking is solid, and the membrane has not failed across the whole roof, a repair may be enough. If the roof is blistering, lifting, repeatedly leaking, or feels soft underfoot, a replacement is often the smarter option. We confirm after an inspection.
Poor edge detailing, cracked or lifting membranes, blocked outlets, damaged flashings, and water pooling are the usual culprits. A lot of leaks also come from older repairs that were only temporary.
Many repairs can be completed in a single visit, depending on the size of the damaged area and access. If timbers need replacing or the problem is more widespread, it can take longer. We’ll tell you the real timeline upfront.
Both can be excellent. EPDM is flexible and low maintenance, GRP is seamless and very neat. The best option depends on the roof layout, the detailing required, and how the roof is used. We’ll recommend what fits your specific roof, not what’s easiest to sell.
Yes, but it depends on why it’s happening. Pooling is usually caused by poor falls, sagging decking, or blocked drainage points. We inspect first, then recommend whether it needs a rebuild in sections or a targeted fix.
Yes. We provide a free quote after assessing the roof, and we’ll explain what’s included so there are no surprises.

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