Trusted flat roofing specialists serving Reading and RG1 to RG30

Flat Roofing Reading

Need flat roof repair, replacement, or a new installation in Reading? We work across RG1 to RG30, covering garages, extensions, dormers and commercial buildings, with clear advice and workmanship that holds up.

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Flat Roof Repair and Installation in Reading

Flat roofs in Reading take a beating from wind-driven rain, blocked outlets, and constant temperature changes. We inspect properly, fix the real cause, and install systems designed to drain correctly and last.

Flat Roof Installation

A new flat roof should not be “flat” in practice. We build in correct falls, install proper edge trims and outlets, and detail roof penetrations carefully, so water runs off as it should and the roof performs for years.
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Flat Roof Replacement

If your current flat roof has repeated leaks, soft spots, or failing seams, replacement is often the smarter move. We strip back compromised layers, check the deck and insulation, then install a new system designed for long-term reliability.
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Flat Roof Repairs

Flat roof leaks are often caused by failed joints, damaged flashing, cracked surfaces, or standing water. We locate the source, repair it properly, and make sure the surrounding areas are sound, so you are not calling someone out again in three months.
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Flat Roof Inspections

Regular inspections help prevent expensive internal damage. We check drainage points, membrane condition, edges, rooflights, and signs of ponding, then advise on any repairs before small issues become big ones.
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Emergency Flat Roof Repairs in Reading

If water is getting in, fast action matters. We provide emergency flat roof repairs in Reading to stop further damage, protect the interior, and stabilise the roof before completing any longer-term repair work.
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Flat Roofing That Suits Reading Homes and Businesses

Reading has a mix of older housing, modern extensions, and commercial buildings, and flat roofs on each behave differently. We take a practical approach, inspect the structure, address drainage, and recommend the right system for the building, not just the quickest option.

1,000

+

Project Completed

97%

Customer Satisfaction

40+

Years of Experience

Flat Roofing Systems We Install

Every system has its place. We will talk you through what suits your roof best based on access, roof size, budget, and how long you want the solution to last.

EPDM Rubber Roofing

EPDM is a durable rubber membrane that handles movement and temperature changes well. It is a solid choice for many flat roofs in Reading because it is flexible, weather-resistant, and suited to both residential and commercial roofs.

GRP Fibreglass Roofing

GRP provides a seamless, hard-wearing finish that works well on smaller flat roofs like garages and dormers. Preparation is everything with GRP, so we focus on clean detailing and proper curing to avoid future cracking or weak spots.

Torch-On Felt Roofing

Modern torch-on felt remains a reliable option when installed in the correct layers with strong edge details. It is a cost-effective system that can perform well for years when the falls and trims are done properly.

Liquid Roofing Systems

Liquid-applied roofing is useful for awkward roof shapes, heavy detailing, or areas where sheet systems are difficult. Once cured, it forms a continuous waterproof layer, ideal for refurbishment work and complex roofs.

Why Flat Roofs Fail, and How We Prevent It

Most flat roof failures come down to poor drainage, rushed detailing around edges and rooflights, or repairs that do not address the underlying issue. We focus on correct falls, sound joins, and proper finishing so the roof stays watertight, even in heavy Reading rain.

1,000

+

Project Completed

97%

Customer Satisfaction

40+

Years of Experience

Trusted Roofing Services Across the
South East

Straight answers, tidy work, and flat roofs that actually last

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.

Checkatrade Verified reviewer - Job location: SL3

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

Checkatrade Verified reviewer - Job location: SL3

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.

Checkatrade Verified reviewer - Job location: SL9

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.

Checkatrade Verified reviewer - Job location: SL4

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.

Checkatrade Verified reviewer - Job location: SL6

Replacement of flat roof - Mitchell and his team are smart, communicative, skilled, friendly, helpful, trustworthy and reliable. I would highly recommend their roofing services.

Checkatrade Verified reviewer - Job location: HP4

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

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL6

Fixed the roof, including all the felting and repaired the chimney. - Good communication throughout. Good work. Very happy with the service.

Checkatrade Verified reviewer - Job location: SL6

Roof repair - Great, really friendly and nice team

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: HP13

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.

Checkatrade Verified reviewer - Job location: HP16

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

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL9

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.

Checkatrade Verified reviewer - Job location: SL6

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

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL6

Fixed the roof, including all the felting and repaired the chimney. - Good communication throughout. Good work. Very happy with the service.

Checkatrade Verified reviewer - Job location: SL6

Roof repair - Great, really friendly and nice team

Checkatrade Verified reviewer - Job location: SL6

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.

Checkatrade Verified reviewer - Job location: SL6
REVIEWS
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Our Process
Inspection and advice

We start with a proper roof inspection and clear advice on the best next step.

Clear quote and scheduling

You get a clear quote and a sensible schedule, with no vague pricing or guesswork.

Installation, repair, and final checks

We complete the work carefully, check weak points before we leave, and keep the site clean.

[FAQ]

Frequently Asked Questions

How long does a flat roof last?
Why is water pooling on my flat roof?
Can you repair a flat roof without replacing it?
Is EPDM better than felt?
How often should a flat roof be inspected?
Do you cover RG1 to RG30?
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