Trusted Flat Roofing in Slough

Flat Roofing in Slough

If your flat roof is leaking, bubbling, or nearing the end of its life, we provide clear advice, tidy workmanship, and long-lasting flat roof repairs and replacements across Slough.

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Flat Roofing Services in Slough

From small flat roof repairs to full warm-roof replacements

Flat Roof Installation in Slough

If you’re building an extension, replacing an old garage roof, or upgrading a tired system, we install flat roofs that are built to handle UK weather properly. We’ll help you choose the right system for your property, drainage, foot traffic, and budget, then install it with clean edges, correct falls, and proper detailing around upstands, skylights, and trims.
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Flat Roof Replacement in Slough

When repeated patch repairs stop making sense, a full replacement is usually the cheaper option long-term. We remove failed layers where needed, check the deck and insulation, and rebuild the roof system so it performs as it should. You get a roof that looks better, drains better, and is far less likely to keep causing issues.
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Flat Roof Repairs in Slough

Flat roof leaks often come from splits, failed joints, worn flashing, ponding water, or damage around rooflights and gutters. We trace the source properly, not guess, then carry out targeted repairs that restore the waterproof layer and stop the problem returning. If the roof is beyond repair, we will tell you straight.
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Flat Roof Inspections in Slough

Not sure if you need a repair or replacement? We’ll inspect the roof covering, edges, outlets, and any weak points, then give you a clear plan based on what we find. If it’s a simple fix, you won’t be pushed into bigger work.
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Emergency Flat Roof Repair in Slough

When water is coming in, speed matters. We can attend quickly to make the roof safe, stop active leaks, and prevent further damage inside your property. Once it’s under control, we’ll explain the proper repair options so you’re not stuck in a cycle of temporary fixes.
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About Our Flat Roofing in Slough

We work on flat roofs across Slough for homes and small commercial buildings, including extensions, garages, dormers, porches, and outbuildings. Our focus is simple, do the job properly, use materials that suit the roof, and leave you with a result that lasts. You’ll get honest advice, clear communication, and a clean finish.

1,000

+

Project Completed

97%

Customer Satisfaction

40+

Years of Experience

Flat Roof Systems We Install in Slough

We’ll recommend the right system based on how your roof is used, how it drains, and what condition it’s in.

EPDM Rubber Roofing in Slough

EPDM is a strong, flexible rubber membrane that suits many domestic flat roofs. It handles temperature changes well, resists cracking, and works especially well on simpler roof shapes. It’s a great option for garages and extensions where you want a clean, low-maintenance finish.

GRP Fibreglass Roofing in Slough

GRP creates a tough, seamless surface that is ideal for flat roofs that get a bit of foot traffic, like balconies and roof terraces. It’s installed with resin layers and topcoat, then finished with neat trims and detailing. Done properly, it looks sharp and performs well for years.

Torch-On Felt Roofing in Slough

Torch-on felt remains a popular choice because it’s reliable, cost-effective, and well-suited to many flat roof replacements. We use multi-layer systems and install them with correct overlaps and edge finishing, so you get proper waterproofing, not a quick patch-up.

Liquid Roofing Systems in Slough

Liquid systems are useful when the roof has awkward details, lots of upstands, or areas where a seamless finish helps prevent leaks. The coating forms a continuous waterproof layer once cured. It can be a smart solution for specific roof types, especially when detailing is the main challenge.

Why Slough Homeowners Choose Us?

You want a flat roof that stops leaking and stays that way. We keep things simple, inspect properly, explain your options clearly, and carry out work with care for your home and your time. If a repair is the right call, we’ll do that. If it needs replacing, we’ll show you why.

1,000

+

Project Completed

97%

Customer Satisfaction

40+

Years of Experience

Trusted Roofing Services Across the
South East

Real reviews from customers who wanted the job done properly, with no mess and no nonsense.

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 look at the roof covering, edges, outlets, and any weak spots around rooflights or joins, then tell you plainly whether it’s a repair job or if replacement is the smarter option.

Clear quote and scheduling

You’ll get a clear written quote that spells out what’s included, what isn’t, and the expected timeline, then we’ll book a date that suits you and keep you updated if anything changes.

Installation, repair, and final checks

Whether it’s a small flat roof repair or a full rebuild, we work cleanly, protect the area, and finish with final checks on drainage, seals, and detailing so you’re not dealing with the same issue again next month.

[FAQ]

Frequently Asked Questions

How long do flat roofs typically last?
What are the signs my flat roof needs repair?
Is it better to repair or replace a flat roof?
Which flat roofing material is best for my property in Slough?
Can you add insulation during a flat roof replacement?
How do I maintain a flat roof after installation?
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