Business Details
27 Years
experience
Expert Sarnafil Roofing Contractors UK
Derwent Roofing Services has been a trusted name in the roofing industry since 1999, specialising exclusively in Sarnafil systems. Our directors, Simon Byrne and Scott Henshaw, bring over 50 years of combined expertise in single-ply membrane installations, with Simons eight-year tenure at Sarnafil as a Field Technician further solidifying our technical proficiency. All our operatives hold NVQ Level 2 certifications in Applied Waterproof Membranes and CSCS accreditation, ensuring adherence to the highest industry standards. We are proud to be CHAS, Construction Line, SMAS, and SSIP accredited, reflecting our commitment to safety and quality. As the UKs largest Sarnafil contractor by square meterage, we deliver commercial and residential projects nationwide, from schools and health centres to timber-frame extensions.Our focus on long-term client relationships drives our competitive, flexible, and efficient service approach. We maintain rigorous quality control through our participation in the Sarnafil Roof Management Register, offering single-point responsibility guarantees for design, materials, and workmanship. Our dedication to innovation and excellence has earned us a reputation as a leader in durable, high-performance roofing solutions. Whether working with major contractors or local builders, we prioritise transparency, technical expertise, and customer satisfaction in every project.
Services
Flat Roofing
Commercial Roofing
Residential Roofing
Sarnafil Systems
Roof Management
Details
- Year established: 1999
Highlights and features
- We have over 50 years of combined director experience in single-ply systems.
- We are the UKs largest Sarnafil contractor by square meterage.
- All operatives hold NVQ Level 2 and CSCS certifications.
- We are CHAS and Construction Line accredited for safety and quality.
- We offer nationwide service with projects in London, Birmingham, and beyond.
Associations and certifications
- CHAS
- Construction Line
- SMAS
- SSIP
What people say
Technical expertise
Reliable service
Durable installations
Professional team
Excellent guarantees
Services
Commercial Roofing
We deliver high-performance commercial roofing solutions using Sarnafil systems, designed for durability and compliance. Our expertise covers schools, health centres, and large-scale developments. With over 50 years of combined director experience and CHAS accreditation, we ensure watertight, long-lasting installations with 15-year guarantees.
Residential Roofing
Our residential roofing services specialise in Sarnafil membranes for timber and oak-frame extensions. These systems offer superior longevity, exceeding 40 years of performance. We provide full project management from design to installation, ensuring seamless integration with modern living spaces and compliance with British Board of Agrment standards.
Flat Roofing
As flat roofing specialists, we install Sarnafils stabilised PVC membranes with fusion-welded joints for maximum watertight integrity. Our Secura-Fix method ensures precision installations, while Sarnametal trims and Prime-Seal upstands provide durable edge detailing. All work is backed by 15-year material guarantees.
Roof Management
We offer comprehensive roof management services for refurbishment projects, operating under the Sarnafil Roof Management Charter. This includes design, material supply, and installation under a single-point responsibility guarantee. Only 10% of Sarnafil contractors qualify for this elite register, reflecting our technical excellence.
Sarnafil Systems
We exclusively install Sarnafil single-ply membranes, the industrys most advanced waterproofing solution. Our teams expertise includes 8 years of direct Sarnafil technical training, ensuring optimal system performance. With NVQ-certified operatives and CSCS accreditation, we guarantee installations meeting 40+ year durability standards.
People
Simon Byrne
Director
Simon brings 25 years of single-ply roofing expertise, including 8 years as Sarnafils Field Technician overseeing quality control and training. He ensures technical excellence across all projects.
Scott Henshaw
Director
With 25 years of combined experience, Scott co-leads Derwent Roofings operations, focusing on client relationships and project delivery. His expertise ensures adherence to industry-leading standards.
Questions
What roofing systems do you specialise in?
We exclusively install Sarnafil single-ply membrane systems, renowned for their durability and 40+ year performance.
Are your installers certified?
All operatives hold NVQ Level 2 in Applied Waterproof Membranes and CSCS certification for industry compliance.
Do you offer guarantees?
Yes, we provide 15-year material guarantees for all Sarnafil installations, with systems tested to last over 40 years.
Which areas do you cover?
We operate nationwide across the UK, with recent projects in London, Birmingham, Cambridge, and Nottingham.
Can you handle commercial projects?
Yes, we work with major contractors on schools, health centres, and commercial buildings, as well as residential extensions.
Reviews (2)
David Wright
Jun 27, 2021
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Positive:Professionalism,Quality,Responsiveness
Derwent Roofing Services Limited provided us with a professional and approachable service from the design to installation. Your flat roof installation is in safe hands with Simon Byrne and his Team.
Service:Roof installation
Derwent Roofing Services Limited provided us with a professional and approachable service from the design to installation. Your flat roof installation is in safe hands with Simon Byrne and his Team.
Service:Roof installation
Anand Bhawsar
Oct 26, 2020
Report
I was recommended Derwent Roofing to resolve a Repair to a parapet wall on two flat roof on my home
Sarnafil was the solution I needed and Derwent Roofing did not disappoint . The team arrived on time. I was greeted by Martin and Carl. I have not met such professional courteous and diligent trade specialist in a long time. I generally dont trust trades because of past history but Martin and Carl did an outstanding job on my flat roof . The job was perfect and I was immensely pleased. I cant recommend Derwent Roofing enough. Martin and Carl are real professionals
Anand Bhawsar
Leicester
Sarnafil was the solution I needed and Derwent Roofing did not disappoint . The team arrived on time. I was greeted by Martin and Carl. I have not met such professional courteous and diligent trade specialist in a long time. I generally dont trust trades because of past history but Martin and Carl did an outstanding job on my flat roof . The job was perfect and I was immensely pleased. I cant recommend Derwent Roofing enough. Martin and Carl are real professionals
Anand Bhawsar
Leicester
