Flat Roofing Amersham
Need a new flat roof, a replacement, or a fast repair in Amersham? We install long-lasting flat roofing systems, and we keep it simple, clear pricing, tidy work, and no nonsense.
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Flat Roofing Services in Amersham
Our Services
About Our Flat Roofing in Amersham
We carry out flat roofing work across Amersham and the wider HP6 area, for homeowners, landlords, and local businesses. Our focus is straightforward, install the right system, do clean work, and leave you with a roof you do not have to worry about every time it rains.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roof Types We Install
Different roofs suit different buildings. Here are the main flat roofing systems we install in Amersham, and when each one makes sense.
EPDM Rubber Roofing
EPDM is a tough rubber membrane with fewer joins and excellent weather resistance. It’s a strong option for extensions and garages in Amersham when you want a clean finish and long service life.
GRP Fibreglass Roofing
GRP creates a seamless, rigid surface that looks smart and performs well when installed correctly. It’s ideal for flat roofs where you want a crisp edge detail and a solid, durable finish.
Torch-on Felt Roofing
Torch-on felt is a reliable, proven system when it’s fitted properly with the right layers and detailing. It suits many flat roofs in Amersham, and gives strong waterproofing at a sensible price point.
Liquid Roofing Systems
Liquid systems work well for tricky roofs with lots of details, awkward edges, or hard-to-access areas. The coating cures into a seamless waterproof layer, making it a good option for certain repair and overlay jobs.
Why Amersham Homeowners Choose Us
You want a flat roofer who turns up, explains things clearly, and does the job right. We keep sites tidy, keep you updated, and we don’t mess you around with vague pricing or half-fixes.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Rated 5 Stars by Homeowners Across
Amersham
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 check the roof properly, not just the obvious patch that’s leaking. Then we explain what’s going on in plain English, and tell you the best fix for your Amersham property.

You get a clear written quote with the work explained, no vague line items. Once you’re happy, we book you in with realistic timings and keep you updated.
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We complete the work cleanly and safely, then do final checks on key weak points like edges, outlets, and joins. We leave the area tidy and make sure you’re confident in what’s been done.
Frequently Asked Questions
It depends on the system and how well it’s installed. As a rough guide, torch-on felt often lasts well over a decade, EPDM can last longer, and GRP is also long-lasting when detailed correctly. We can inspect your roof and give a realistic view based on its condition.
Yes, in many cases. If the roof structure is sound and the issue is localised, a proper repair can be the right call. If the roof has widespread failure, repeated leaks, or poor detailing, a replacement is usually the smarter option long-term.
Common signs include water pooling, bubbling or lifting, cracks, damp patches indoors, and leaks around edges or outlets. If you’re seeing any of these in Amersham, it’s worth getting it checked before the damage spreads.
No. Flat roofs leak when they’re badly installed, poorly detailed, or left too long without maintenance. A correctly installed system with proper drainage and clean joins should stay watertight.
If it’s urgent and water is getting in, we prioritise emergency callouts where we can. The goal is to stop the ingress quickly, then follow up with a proper repair or replacement plan.
It depends on the roof shape, access, budget, and what finish you want. EPDM works well for clean, simple roofs, torch-on felt is a proven all-rounder, and GRP suits roofs where you want a crisp, hard finish. We’ll recommend what actually fits your roof, not what’s easiest to sell.

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