Trusted Flat Roofing Specialists in Hampstead

Flat Roofing Hampstead

Professional flat roof installation, repair, and replacement in Hampstead NW3. Built for period homes, modern extensions, and commercial properties, with clear advice and no shortcuts.

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Flat Roofing Services in Hampstead

Complete flat roofing solutions for residential and commercial properties across Hampstead and surrounding NW London areas.

Flat Roof Installation in Hampstead

Installing a flat roof in Hampstead takes more than laying a membrane and hoping for the best. Many properties here are older, extended over time, or architect-led, which means structure, drainage, and detailing matter. We design and install flat roofs with correct falls, high-performance insulation, and durable waterproof systems that comply with current building standards. The result is a roof that drains properly, performs thermally, and blends cleanly with the rest of the property.
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Flat Roof Replacement Hampstead

If your flat roof has reached the end of its life, repeated patch repairs will only delay the inevitable. We carry out full flat roof replacements in Hampstead by removing failed materials, inspecting the deck, upgrading insulation where required, and installing a new waterproof system built to last. This approach avoids hidden problems being sealed in and gives you a roof that performs properly for years, not months.
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Flat Roof Repairs Hampstead

Flat roof leaks are often misleading. Water rarely enters where it appears internally. We locate the real cause, whether it’s split seams, cracked coverings, failed flashings, blocked outlets, or movement around rooflights. Where a repair is structurally sound, we’ll fix it properly. If repair is no longer viable, we’ll explain why and outline your options clearly.
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Flat Roof Inspections in Hampstead

If you’re unsure about the condition of your flat roof, an inspection is the smartest first step. We assess surface condition, drainage, insulation performance, and edge detailing, then give honest advice based on what we see. You’ll know whether your roof needs minor attention, longer-term planning, or immediate action.
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Emergency Flat Roof Repair Hampstead

Storm damage, sudden leaks, or water ingress need fast response. We prioritise emergency flat roof repairs across Hampstead to secure the roof, stop further damage, and protect the interior of the property. Once the immediate issue is controlled, we’ll advise on the correct permanent repair, so you’re not relying on temporary fixes.
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About Our Flat Roofing Work

Flat roofs are common across Hampstead, from period conversions and rear extensions to modern apartments and commercial buildings. Each comes with different structural and drainage challenges. Our approach is simple: assess the roof properly, use the right system for the building, and install it with attention to detail. That’s how flat roofs stay watertight, energy-efficient, and problem-free.

1,000

+

Project Completed

97%

Customer Satisfaction

40+

Years of Experience

Flat Roof Systems We Install in Hampstead

We install multiple flat roofing systems and recommend each based on roof layout, usage, and long-term performance, not sales preference.

EPDM Rubber Roofing Hampstead

EPDM rubber roofing is a durable, flexible system well suited to extensions and garage roofs. It handles temperature movement well and requires minimal maintenance. When installed with correct edge trims and sealed upstands, EPDM provides long-term waterproof protection and a clean finish.

GRP Fibreglass Roofing Hampstead

GRP fibreglass roofing creates a seamless, joint-free surface that works particularly well on balconies, walk-on areas, and roofs with detailed edges. It offers excellent waterproofing and a neat appearance when installed correctly, making it a popular choice for residential properties.

Torch-On Felt Roofing Hampstead

Modern torch-on felt systems are a reliable option for many flat roofs. Installed as a layered system, they provide strong waterproofing and good durability at a sensible cost. This makes them suitable for both domestic and light commercial applications when fitted properly.

Liquid Flat Roofing Hampstead

Liquid applied roofing systems are ideal for complex roofs with multiple penetrations or awkward detailing. The coating cures into a seamless waterproof layer, reducing weak points and making it especially effective for refurbishment and overlay projects.

Why Hampstead Homeowners Choose Us?

Hampstead homeowners want straight answers and work done properly. We don’t oversell repairs or hide problems. You get honest advice, clear pricing, and workmanship that respects the property. From initial inspection to final checks, we focus on doing the job once and doing it right.

1,000

+

Project Completed

97%

Customer Satisfaction

40+

Years of Experience

Trusted Roofing Services Across the
South East

Feedback from clients who wanted reliable flat roofing without unnecessary disruption.

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
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Our Process
Inspection and advice

We inspect the roof thoroughly, explain what’s happening, and outline realistic solutions based on condition, age, and risk.

Clear quote and scheduling

You receive a detailed quote with defined scope, realistic timelines, and no vague allowances or surprises.

Installation, repair, and final checks

Work is carried out safely and cleanly, followed by final drainage and waterproof checks before completion.

[FAQ]

Frequently Asked Questions

How long should a flat roof last?
Is it better to repair or replace a flat roof?
Are flat roofs suitable for older Hampstead properties?
Can insulation be improved during replacement?
How disruptive is flat roof work?
Do flat roofs come with guarantees?
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