Reliable flat roofing across Berkshire, clear advice, tidy workmanship, and fixes that last

Flat Roofing in Berkshire

If your flat roof is leaking, holding water, or nearing the end of its lifespan, you need a solution that’s properly assessed and finished correctly, not a quick patch that fails again. We provide flat roof inspections, repairs, replacements and new installations across Berkshire for homeowners and property managers, with straightforward advice on what’s needed and why.

Enquire now

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Marley LogoRubberCover Logo
Euroclad Group LogoBBA Logo
Cure It Logo
Marley LogoRubberCover Logo
Velux LogoEuroclad Group LogoBBA Logo
Cure It Logo

Our Flat Roofing Services in Berkshire

We work on flat roofs for extensions, garages, dormers, bay roofs and commercial units across Berkshire. From small repairs to full replacements, we focus on long-term waterproofing, clean detailing, and sensible drainage so your roof performs properly in real British weather.

Flat Roof Installation

Flat roof installation is common on extensions and garage builds across Berkshire, and the quality of the build makes all the difference. We install flat roofing systems with proper preparation, correct falls for drainage, and strong detailing at edges and joins. The goal is simple, a flat roof that stays warm, dry, and dependable for the long run.
Enquire Now

Flat Roof Replacement

Flat roof replacement is often the right option when the roof has repeated leaks, widespread cracking, sagging, or a surface that’s reached the end of its life. We remove failing materials, check the structure underneath, and replace the roof with a system that suits the property and how the roof is used, so you’re not stuck in a cycle of constant call-outs.
Enquire Now

Flat Roof Repairs

Flat roof leaks are commonly caused by splits in the membrane, failed seams, damaged flashing, or blocked outlets that lead to standing water. Our flat roof repair work focuses on identifying the true entry point and fixing it properly, rather than guessing. Catching issues early usually prevents water ingress from spreading into insulation, joists, and internal finishes.
Enquire Now

Flat Roof Inspections

A flat roof inspection is the best starting point if you’re unsure whether you need a repair or a replacement. We check the roof surface, seams, edges, drainage points, and the areas where leaks typically start. You’ll get a clear explanation of what we’ve found and what the realistic options are, without pressure.
Enquire Now

Emergency Flat Roof Repairs

If water is coming in suddenly, the priority is to protect the property and stop the problem getting worse. Emergency flat roof repairs are aimed at making the roof watertight and reducing further damage, then advising on the permanent fix required to stop it returning.
Enquire Now

About Our Flat Roofing Work in Berkshire

Across Berkshire, we regularly see flat roofs on home extensions, garages, dormers and smaller commercial buildings, especially around towns like Reading, Wokingham, Bracknell, Slough, Maidenhead and Newbury. Many problems come from ageing felt systems, rushed edge detailing, and drainage that was never formed correctly, which leads to ponding after heavy rain. Flat roofs often fail early when outlets are blocked, falls are wrong, or seams and upstands are poorly finished. Our approach is to fix the weak points properly so the roof performs as it should.

1,000

+

Project Completed

97%

Customer Satisfaction

40+

Years of Experience

Flat Roofing Systems We Work With

The best flat roofing system depends on the roof’s size, exposure, access, and whether it needs to be walked on regularly. We work with a range of flat roof materials and will explain the pros and limitations of each option based on your property.

EPDM Rubber Roofing

EPDM is a durable rubber membrane often used for residential flat roofs such as garages and extensions. It handles movement well, performs reliably in UK conditions, and is a strong option when installed with correct preparation and clean edge detailing.

GRP Fibreglass Roofing

GRP fibreglass roofing creates a seamless, hard-wearing surface that suits many smaller flat roofs and areas where a tougher finish is useful. When applied correctly, it forms a strong waterproof layer and offers a clean, tidy look.

Torch-On Felt Roofing

Modern torch-on felt remains a practical option for certain properties when it’s layered and installed correctly. The key is a well-prepared base, strong detailing at edges and joins, and finishing that prevents water tracking and early failure.

Liquid Roofing Systems

Liquid roofing systems can be suitable where the roof has complex detailing or where an overlay approach is appropriate. They form a seamless waterproof layer and can be effective when installed with correct preparation, reinforcement and curing conditions.

Why Homeowners Across Berkshire Choose Alliance Roofing?

Homeowners choose Alliance Roofing because we keep things clear and practical. We inspect the roof properly, explain what’s wrong in plain terms, and give realistic options based on the condition of the roof, not guesswork. Our work focuses on the details that prevent repeat problems, especially drainage, seams, edges and upstands, and we treat your property with respect throughout the job.

1,000

+

Project Completed

97%

Customer Satisfaction

40+

Years of Experience

Rated 5 Stars by Homeowners Across

Berkshire

We are proud to be consistently rated 5 stars for the quality of our workmanship, reliability and communication. Our reputation is built on honest advice, professional standards and delivering roofing work that lasts.Webflow System

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 Roof

Berkshire

Leak in the roof- Very polite and professional. Job was completed professionally at a very good price. Would highly recommend

Roof Repair

Berkshire

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.

Tile Realignment

Berkshire

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

Tile Replacement

Berkshire

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.

New Roof

Berkshire
Our Process
Inspection and advice

We assess the roof’s condition and identify the cause of any issues. You’ll get a clear explanation of what we’ve found and what the sensible next steps are.

Clear quote and scheduling

We provide a straightforward quotation that explains what’s included. Once agreed, we schedule the work around what’s practical for you and the job.

Installation, repair, and final checks

We carry out the work with careful detailing and watertight finishes. Final checks are completed at the end so you’re not left hoping everything has been done properly.

[FAQ]

Frequently Asked Questions

How do I know if my flat roof needs repairing or replacing?
What are the most common causes of flat roof leaks?
How long does flat roofing work usually take?
Is ponding water on a flat roof a problem?
Can you repair a flat roof in winter?
What flat roofing system is best for my property?
Banner Image
[Contact Us]

Get a Flat Roofing Quote in Berkshire

Send a message

Request a call back

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.