Flat Roofing Witney
If your flat roof is leaking, bubbling, or holding water, it usually gets worse fast. We install and repair flat roofs across Witney and the surrounding villages, with clear quotes and proper workmanship you can rely on.
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Flat Roofing Services in Witney
Our Services
About Our Flat Roofing in Witney
Flat roofs are common across Witney, especially on extensions, garages, dormers and bay roofs. The problem is that older flat roofs were often built with poor drainage and tired materials, so water sits, joints fail, and small issues turn into bigger repairs. Our approach is simple, use the right system for the roof type, install it properly, and finish the details well so the roof stays watertight through Witney’s wet winters and shifting temperatures.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roof Types We Install and Repair in Witney
Different flat roofing systems suit different roof shapes, budgets, and levels of foot traffic. Below are the main options we work with across Witney, and we will recommend the one that fits your property, not the one that is easiest for us.
EPDM Rubber Roofing in Witney
EPDM is a strong rubber membrane that works well for many garage and extension roofs. It is flexible, handles temperature changes well, and gives a clean finish when installed with proper edge trims and drainage. EPDM is a solid choice if you want a reliable system with minimal maintenance.
GRP Fibreglass Roofing in Witney
GRP creates a hard, seamless surface which is ideal where you want a tough, tidy finish. It is often used on smaller flat roofs, dormers, and balconies, particularly when good detailing around edges and outlets is needed. When installed on a sound deck with the right build-up, GRP offers long-term waterproofing and a smart finish.
Torch-on Felt Roofing in Witney
Modern torch-on felt is not the flimsy stuff people remember from years ago. A proper multi-layer felt system is durable, cost-effective, and well suited to many flat roofs around Witney, especially where you want a proven option without overcomplicating the job. The key is correct layering, neat seams, and tidy edge work so water cannot track underneath.
Liquid Roofing Systems in Witney
Liquid roofing systems create a seamless waterproof layer, which makes them a strong option for flat roofs with awkward details, joints, or around outlets. They’re often used on refurb jobs where you need a clean, watertight finish without lots of joins that can fail over time. Once applied and cured, the coating forms a durable barrier that helps protect against leaks and standing water.
Why Witney Homeowners Choose Us for Flat Roofing?
People do not want sales talk when their roof is leaking, they want clear answers and reliable work. We focus on doing the job properly, turning up when we say we will, and giving you a straight explanation of what your roof needs. Whether it is a small repair or a full replacement, you will know what is happening, how long it will take, and what it will cost.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Real feedback matters, because flat roofing only proves itself when the rain hits. Here’s what customers often mention about working with our team.
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 start by checking the problem properly, not guessing from a photo. We look at the membrane condition, edges, drainage points, and any signs of trapped moisture, then explain what’s causing the issue and what your realistic options are.

Once we know what the roof needs, you get a clear quote that explains the work in plain English. If you want to go ahead, we agree a date that suits you, and we confirm what access we need and what to expect on the day.
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We complete the work neatly and safely, keeping disruption to a minimum. When the job is finished, we check the details that usually get rushed, edges, joins, outlets, and water run-off, so you are not left with a “looks fine” roof that fails later.
Frequently Asked Questions
Most minor repairs can be completed in a few hours, depending on access and the type of roof covering. If the roof needs drying time, or the issue is more widespread, we will tell you upfront and plan it properly.
If the roof is leaking in one area and the rest of the membrane is sound, a repair is often enough. If you have recurring leaks, soft spots, lifting edges, or multiple failing areas, replacement usually ends up being the safer and more cost-effective option.
It depends on the roof size, shape, and how it is used. EPDM is great for many garage and extension roofs, felt is a proven all-rounder, and GRP suits smaller roofs where you want a hard seamless finish. We will recommend the system that fits your roof, not a one-size-fits-all answer.
Yes, in many cases, but weather matters. Some systems need dry conditions to bond and cure properly. If it’s urgent, we can make the roof safe and watertight short-term, then return to complete the permanent repair when conditions are right.
The most common causes are failed edges, splits in the covering, poor drainage leading to standing water, and weak points around outlets, skylights, or joins. A proper inspection usually finds the real cause quickly.
Yes. We can inspect the roof, explain what it needs, and provide a clear quote with no pressure.

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