Flat Roofing Whitchurch
Professional flat roof installation, replacement and repair services in Whitchurch, RG28, for garages, extensions, dormers and residential properties.
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Flat Roofing Services in Whitchurch
Our Services
About Our Flat Roofing
Flat roofs are common across Whitchurch homes, particularly on extensions, garages and dormers. The difference between a flat roof that lasts and one that constantly leaks comes down to preparation, drainage and correct system choice. We focus on doing the job properly the first time, using proven materials and clean workmanship rather than short-term fixes.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Offer
We install a range of flat roofing systems to suit different roof sizes, layouts and budgets, ensuring the right solution for each Whitchurch property.
EPDM Rubber Roofing
EPDM rubber roofing is a flexible, low-maintenance system ideal for larger flat roof areas. It handles temperature changes well and offers excellent resistance to cracking, making it a popular choice for Whitchurch homeowners looking for longevity.
GRP Fibreglass Roofing
GRP fibreglass roofing creates a seamless, rigid surface with a clean finish. It works particularly well for garages, balconies and extensions where a modern look and strong waterproof protection are required.
Torch-On Felt Roofing
Torch-on felt roofing remains a reliable option when installed correctly. We use multi-layer systems with careful detailing around edges and outlets to reduce the common failure points seen on rushed felt installations.
Liquid Roofing Systems
Liquid flat roofing systems are ideal for complex roof shapes and detailed areas. Applied cold, they cure into a seamless waterproof layer that is effective for overlays and awkward roof layouts.
Why Whitchurch Homeowners Choose Us?
Homeowners in Whitchurch choose us because we give honest advice and deliver work that lasts. We turn up when agreed, explain your options clearly and leave the property tidy. No pressure selling, no vague promises, just straightforward flat roofing done properly.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Our work is recommended by homeowners who want flat roofs that stay watertight, not patched year after year.
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 inspecting your flat roof properly and explaining what’s causing the issue. If a repair makes sense, we’ll say so. If replacement is the better option, we’ll explain why.

You receive a clear written quote covering materials, labour and timescales. Once approved, we schedule the work around your availability and keep you informed throughout.
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All work is carried out safely and with minimal disruption. Once finished, we check drainage, joints and edges, then walk you through the completed work and aftercare advice.
Frequently Asked Questions
Persistent leaks, soft areas underfoot, lifting edges or widespread cracking usually indicate the roof is nearing the end of its lifespan. An inspection confirms whether repair or replacement is best.
There’s no single best system. EPDM suits larger areas, GRP works well on smaller roofs, felt remains cost-effective, and liquid systems handle complex shapes. The right choice depends on your roof and budget.
Most garage or extension flat roofs can be completed within one to two days, depending on size, access and whether decking or insulation needs replacing.
Temporary weatherproofing is sometimes possible, but permanent repairs depend on conditions. We won’t carry out work that’s likely to fail.
Basic maintenance such as keeping outlets clear and checking after storms helps prevent damage. Occasional inspections can avoid costly repairs later.
Yes. We provide free inspections and clear quotes so you can make an informed decision without pressure.

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