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Flat Roofing in Hertfordshire
Flat roof repairs, replacements and new installations across Hertfordshire including Watford, St Albans, Hemel Hempstead, Hertford, Stevenage and surrounding towns. Fully insured specialists with same-day emergency response. Free inspection and quote.
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Our Flat Roofing Services in Hertfordshire
Our Services
Flat Roof Installation
Flat Roof Replacement
Flat Roof Repairs
Flat Roof Inspections
Emergency Flat Roof Repairs
About Our Flat Roofing Work in Hertfordshire
Much of our flat roofing work across Hertfordshire involves 1930s and post-war semi-detached properties with flat roof extensions and garage roofs — particularly common in Watford, Hemel Hempstead and St Albans. These roofs were often built with basic felt systems that have long since reached the end of their lifespan. Blocked outlets from leaf debris off mature trees, poor original falls, and failed seams around rooflights are the issues we deal with most frequently. We cover the whole county including WD, AL, HP, SG, EN and CM postcode areas, and we understand the specific housing stock and exposure conditions in each part of Hertfordshire rather than applying a one-size-fits-all approach.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Flat Roofing Systems We Work With
Different flat roofing systems suit different buildings, budgets, and levels of use. We work with a range of flat roof materials and will advise on the most appropriate option based on the condition and purpose of the roof.
EPDM Rubber Roofing
EPDM rubber roofing is a popular option for residential flat roofs due to its flexibility and resistance to weathering. It performs well on garages and extensions and is known for its durability when installed correctly. EPDM systems are low maintenance and provide reliable long-term waterproofing.
GRP Fibreglass Roofing
GRP fibreglass roofing creates a seamless, joint-free surface that is highly durable. It is well suited to flat roofs that require a hard-wearing finish and is often chosen for balconies and walk-on areas. When installed properly, GRP offers excellent resistance to water ingress and surface damage.
Torch-On Felt Roofing
Modern torch-on felt roofing is a significant improvement on older felt systems. When layered and installed correctly, it provides dependable waterproofing and is suitable for many flat roof applications. It remains a cost-effective option for certain properties when applied to a well-prepared base.
Liquid Roofing Systems
Liquid roofing systems are often used where traditional replacement is not practical. They can be applied over existing surfaces, creating a seamless waterproof layer. This option can reduce disruption and is particularly useful for complex roof shapes or detailing.
Why Homeowners Across Hertfordshire Choose Alliance Roofing?
Hertfordshire homeowners choose us because we are local, insured, and do not subcontract work out. Every job is carried out by our own team, with Mitchell overseeing quality on every project. We cover the whole county and can usually inspect within 48 hours. No call centres, no vague quotes — just a straight answer about what your roof needs and what it will cost.
1,000
Project Completed
97%
Customer Satisfaction
40+
Years of Experience
Rated 5 Stars by Homeowners Across
Hertfordshire
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.
Every job starts with a proper inspection to understand the condition of the roof and the cause of any issues. We explain the options clearly so you can make an informed decision.
You’ll receive a detailed quotation outlining the work involved and realistic timescales. Once agreed, we schedule the work at a time that suits you.
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All work is carried out with care and attention to detail. Once complete, final checks are carried out to ensure the roof is watertight and finished correctly.
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