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
Rated 5 Stars by Homeowners Across
Godalming
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
Leak in the roof- Very polite and professional. Job was completed professionally at a very good price. Would highly recommend
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 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
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.

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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