Flat Roofing Guildford
Need a flat roof repair in Guildford, or planning a new flat roof for a garage or extension? We install and repair flat roofs across Guildford with clear advice, tidy workmanship, and guarantees you can actually rely on.
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Flat Roofing Services in Guildford
Our Services
Local Flat Roofing Company in Guildford
We work across Guildford on garages, extensions, bays, dormers and small commercial roofs. You’ll get straightforward advice, a written quote, and a team that turns up when they say they will. We keep the job tidy, protect your property, and finish the details properly so the roof performs long term.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Install in Guildford
Different properties need different flat roofing systems. We’ll help you choose based on lifespan, budget, appearance, and how the roof is used.
EPDM Rubber Roofing in Guildford
EPDM is a popular choice for flat roofs in Guildford because it handles temperature changes well and resists cracking. It suits garages and extensions where you want a clean finish and low maintenance, and when installed with proper trims and drainage it performs reliably for years.
GRP Fibreglass Roofing in Guildford
GRP is ideal when you want a tough, seamless finish. It works well on flat roofs where occasional foot traffic is needed, like accessing windows or gutters. Installed correctly, it creates a fully sealed surface with strong edging and a smart look.
Torch-On Felt Roofing in Guildford
Modern torch-on felt systems are multi-layered and built for dependable waterproofing. It’s a strong value option for garages and extensions when installed properly, and it’s a common choice when you want a practical solution without the higher cost of premium systems.
Liquid Roofing Roofing in Guildford
Liquid systems are great for roofs with awkward shapes, corners, or lots of detailing. The coating forms a continuous waterproof layer which helps reduce weak points, and it can be suitable for refurbishments where removal is not practical, depending on the existing roof condition.
Why Guildford Homeowners Choose Us for Flat Roofing?
Because they want straight answers and work that holds up. We inspect properly, explain the options clearly, and price the job fairly. Whether it’s a flat roof repair in Guildford or a full replacement, we focus on durability, neat finishing, and leaving your home clean and respected.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Rated 5 Stars by Homeowners Across
Guildford
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 roof properly and give clear, honest advice on what needs fixing and what doesn’t.

You’ll get a straightforward written quote and a realistic schedule, with no vague pricing or surprises.
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All work is carried out carefully, then checked before sign-off to make sure the roof is fully watertight and finished properly.
Frequently Asked Questions
If the roof has one small leak or a local defect, a repair is often enough. If you’re seeing repeated leaks, sagging areas, soft spots, or water pooling that keeps coming back, replacement is usually the smarter long-term fix. We can inspect it and tell you what’s actually worth doing.
Most leaks come from failed seams, cracked coverings, poor drainage, or weak detailing around edges, skylights, and walls. Sometimes the issue is beneath the surface, like moisture trapped in old layers or a damaged deck.
For most garages, EPDM, torch-on felt, or GRP can all work well, it depends on your budget and the roof structure. EPDM is great for low maintenance, GRP gives a hard finish, and felt is a solid value option when installed as a proper system.
Many domestic flat roofs can be completed in one to two days, depending on size, access, and whether any timber needs replacing. We’ll confirm the timeline after inspection and keep it realistic.
Some emergency work can be done to reduce water ingress, but permanent repairs usually need dry conditions so materials bond properly. If it’s actively leaking, we’ll advise immediate steps and arrange the earliest safe window for a proper fix.
Yes. Guarantees depend on the system installed and the scope of work. We’ll confirm this clearly in writing as part of your quote so you know exactly what’s covered.

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