Yorkshire Sculpture Park Living Roof


Cityflor® Waterproofing System

Cityflor warm roof living roof systems are robust SBS polymer modified bitumen membranes for use in extensive and intensive green, biodiverse brown and modular green roofs, as well as protected terrace, podium and balcony applications.

The anti-root technology has proven long-term resistance to root penetration, fertilisers and insecticides, and is specifically designed to withstand the application of intensive landscaping finishes during and post construction.

Cityflor systems guarantee a complete specification solution comprising Air and Vapour Control Layers (AVCLs), tapered or flat board thermal insulation, underlayers and robust capsheets self finished in a choice of colours, providing a versatile and robust finish for both new build and refurbishment projects.


Cityflor multi-layer waterproofing systems are perfectly adapted to the needs of inaccessible and accessible living roofs. Cityflor is extremely versatile and can be adapted to suit the exact biodiversity and landscaping requirements of the roof, ensuring the best, most appropriate system is specified.

All Cityflor system assemblies comply with British and European standards and have been approved by the British Board of Agrément under certificate number 15/5222 PS2. Cityflor is classified as unrestricted by the requirements of The Building Regulations Approved Document B: Fire Safety and certified Broof(t4) in accordance with BS EN 13501-5:2005 fire classification of construction products and building elements.


Installation of Cityflor living roof waterproofing systems is carried out by accredited installers whose operatives have successfully attended Axter’s RBM upskilling course. Cityflor systems can be installed in a multi layer application on all deck types, and can be fully or partially bonded in a completely flame free, hot air welded or torch applied application on flat and pitched roof specifications. All system components are specified and installed to ensure compatibility and single source responsibility, and detailing is completed in full compliance with Axter recommendations and the NFRC Safe2Torch guidance, and the Green Roof Organisation (GRO) Code of Practice.

25 Year guarantee

Cityflor achieves up to a 25 year insured system guarantee covering materials, design and workmanship, and has a service life in excess of 50 years. Additional independent insurance backed insolvency protection for Axter's materials, and the workmanship of the accredited roofing contractor, is also available for 10 years in respect to Platinum Guarantees.

Guarantee 25


Cityflor carries a BBA certificate and is accepted by all third party building warranty providers such as LABC and NHBC, and is in full compliance with all building regulations.

More Benefits

  • BBA approved - certificate number 15/5222 PS2
  • Fire Classification Broof(t4): The highest classification for external fire testing in compliance with approved Document B, when tested as part of a Cityflor flat roof waterproofing system assembly. This information can be found in the system Fire Test Report available from Axter Ltd.
  • Resistant to root penetration (FLL and EN 13948 compliant)
  • Service life in excess of 50 years
  • Robust trafficable surface
  • Ideal for new build and roof refurbishment
  • Includes torch-on, self-adhesive and completely flame free systems
  • Manufactured within ISO 9001 and 14001 certified management systems

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