Flat Roofing Chiswick
Professional flat roof installation, repairs and replacement across Chiswick, done properly and priced clearly.
Enquire now














Flat Roofing Services in Chiswick
Our Services
Flat Roofing That Holds Up
Most flat roof failures come down to poor detailing, rushed installs, or cheap materials. We focus on correct falls, sealed edges, clean joints and proper outlets, so the roof performs properly year after year.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roof Systems We Install
We’ll recommend the most suitable flat roofing system based on your roof size, usage and budget.
EPDM Rubber Roofing
A durable, flexible membrane ideal for larger flat roofs and extensions, with excellent resistance to temperature changes.
GRP Fibreglass Roofing
A seamless, hard-wearing system suited to balconies, walk-on areas and smaller flat roofs where a clean finish matters.
Torch-On Felt Roofing
A reliable multi-layer system when installed correctly, offering strong waterproof protection at a sensible cost.
Liquid Roofing Systems
Ideal for complex roof shapes or refurbishment work, forming a continuous waterproof layer without major disruption.
Why Chiswick Homeowners Choose Us?
We give straight advice, turn up when we say we will, and leave the site clean. No pressure, no vague promises, just solid flat roofing work done properly.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Trusted Roofing Services Across the
South East
Feedback from homeowners who wanted a flat roof fixed properly, not sold to.
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 inspect the roof carefully, explain the issue clearly, and tell you whether repair or replacement actually makes sense.

You receive a clear written quote and a realistic timeline, with no hidden extras added later.
.png)
All work is completed cleanly, followed by final checks on seams, outlets and edges to confirm the roof is watertight.
Frequently Asked Questions
That depends on the system and installation quality, but a properly installed flat roof should last many years with routine checks.
Often yes. If the issue is localised, repairs can be effective. Widespread failure usually means replacement is the better option.
Blocked outlets, split seams, lifted edges, poor detailing and ponding water are the most common causes.
Yes. If water is getting in, we aim to attend quickly to stop further damage and secure the roof.
EPDM, GRP, felt and liquid systems all have their place. The right choice depends on roof size, access and usage.
Yes. We explain the work, confirm what’s included, and provide a clear written quote before anything starts.

.png)
.png)
.png)
.png)
