Business Details
50+ Years
experience
Emergency
services
Expert Roofing Contractors in London
Established in 1969, J & J Asphalt Roofing is a family-run roofing contractor with nearly five decades of expertise in flat roofing solutions across London and surrounding areas. Specialising in asphalt, single ply, liquid plastics, EPDM, GRP, and lead roofing, we address everything from minor repairs to full-scale renewals, including car parks and basement tanking. Our partnerships with major clients like Islington Council, NHS, and London Underground underscore our reliability.As approved installers for industry leaders such as Sika Trocal and Flex-R, we combine manufacturer-backed quality with electronic fault detection technology. Fully insured with 10M employers' liability and 1M public liability coverage, we prioritise transparency through itemised quotes and flexible inspection options.
Services
Asphalt Roofing
Single Ply Roofing
Liquid Roofing
EPDM Roofing
GRP Roofing
Lead Roofing
Roof Repairs
Tanking Basements
Green Roofing Systems
Electronic Roof Testing
Details
- Year established: 1969
Highlights and features
- We have over 50 years of experience in flat and specialist roofing solutions.
- We are approved installers for Sika Trocal, Flex-R, and Hertalan EPDM systems.
- We work with major clients including NHS, London Underground, and Islington Council.
- We offer electronic roof testing to detect pinhole leaks with same-day repairs.
- We maintain 10M employers' liability and 1M public liability insurance coverage.
What people say
Reliable repairs
Expert service
Prompt emergency response
Professional work
Fair pricing
Services
Asphalt Roofing
We install mastic asphalt 988T for roofs, car parks, and balconies. Our asphalt solutions include paving grade applications and basement tanking systems. This durable material provides long-lasting waterproofing for commercial and residential properties across London.
Single Ply Roofing
As approved installers of Sika Trocal and Fatra systems, we fit flame-free PVC membranes. These lightweight solutions suit urban environments requiring compliance with fire regulations. Our installations come with manufacturer guarantees for added peace of mind.
Liquid Roofing
We apply Desmopol and SIG FIX-R liquid plastics directly to decks or over old roofs. These seamless coatings eliminate leaks through continuous coverage. Our electronic testing service identifies hidden faults for precise repairs in challenging flat roof scenarios.
EPDM Roofing
We install Flex-R and Hertalan EPDM rubber systems renowned for flexibility and durability. These UV-resistant membranes withstand extreme weather conditions. Ideal for irregular roof shapes requiring custom-fitted waterproofing solutions across London's commercial properties.
Green Roofing Systems
We supply and install modular pre-grown green roofs with integrated insulation. These systems improve thermal efficiency while meeting urban biodiversity requirements. Complete with ventilation and drainage components for sustainable building projects in central London.
Questions
What types of roofing systems do you install?
We specialise in asphalt, single ply PVC, EPDM rubber, liquid plastics, GRP, and lead roofing systems for both residential and commercial properties.
Do you handle emergency roof repairs?
Yes, we provide emergency insurance work with before-and-after photographic documentation for claims processing.
Are you approved by roofing material manufacturers?
We are approved installers for Sika Trocal, Flex-R, Hertalan EPDM, and Desmopol liquid systems with full manufacturer backing.
Do you work with large commercial clients?
Yes, we regularly subcontract for Islington Council, NHS, London Underground, and major contractors like Kier and TFL.
What insurance coverage do you provide?
We hold £10M employers' liability, £1M public liability, and £100,000 contract works coverage with full documentation available on request.
