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Flat Roofing Streatham
Flat roof installation, replacement and flat roof repairs in Streatham, SW16, for extensions, garages, dormers and residential properties across South London.
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Flat Roofing Services in Streatham
Our Services
Flat Roof Installation
Flat Roof Replacement
Flat Roof Repairs
Flat Roof Inspections
Emergency Flat Roof Repairs
About Our Flat Roofing
Flat roofs are common across Streatham, especially on rear extensions, dormers and garages. The difference between a flat roof that lasts and one that fails early comes down to preparation, drainage and correct detailing around edges and penetrations. We focus on the fundamentals, then finish cleanly so the roof performs properly and looks right on the property.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Offer
We offer several flat roofing systems so you get the right fit for your roof layout, budget and expected lifespan.
EPDM Rubber Roofing
EPDM rubber roofing is a strong option for larger flat roof areas because it stays flexible and resists cracking. It works well for Streatham extensions and garages where you want a long-lasting, low-maintenance roof with excellent waterproof performance.
GRP Fibreglass Roofing
GRP fibreglass roofing creates a seamless finish that’s ideal for smaller flat roofs and areas where clean detailing matters. It’s a popular choice for dormers, porches and compact extensions where you want a neat, durable surface.
Torch-On Felt Roofing
Torch-on felt is still a solid choice when installed properly. We use multi-layer systems and focus on the common failure points, like edges, corners and outlets, to avoid the peeling and splitting that comes from rushed work.
Liquid Roofing Systems
Liquid roofing systems are ideal for awkward roof shapes and detailed areas where sheet materials can struggle. Applied as a seamless coating, they can be effective for overlays and complex junctions, creating a watertight finish without weak joins.
Why Streatham Homeowners Choose Us?
You don’t want a roofer who guesses, you want someone who explains what’s wrong and fixes it properly. Streatham homeowners choose us for straight advice, tidy work, and repairs that actually last. We turn up when we say we will, keep you updated, and leave your property clean when the job’s done.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Rated 5 Stars by Homeowners Across
Streatham
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
Leak in the roof- Very polite and professional. Job was completed professionally at a very good price. Would highly recommend
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 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
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.
We start with a proper look at the flat roof, including edges, joints and drainage points, then explain what’s causing the issue and what the realistic options are.
You get a clear written quote with a sensible timeframe. If the roof needs urgent attention, we’ll prioritise it and book you in as quickly as possible.
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Once the work is complete, we check the details that usually get missed, outlets, seams, edges and flashings, then run through aftercare so you know what to look out for.
Frequently Asked Questions
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