Construction project with cranes

Force Dalle®

Force Dalle® Waterproofing System

The first of its kind, Force Dalle is an innovative hybrid waterproofing system that combines the benefits of hot melt systems and advanced polymer modified bitumen membrane technology to create a unique and highly durable system that is a cost effective alternative to traditional hot melt.

Force Dalle is engineered for use on all warm, inverted and cold roof types in accordance with BS 6229:2018 and in conjunction with all roof finishes. It is specifically developed to provide risk free, added value and speed to the construction programme due to its ultra-fast minimal component installation process.


Force Dalle is a single or multi-layer waterproofing system suitable for a variety of applications including blue roofs and living roofs, has exceptional durability and performance characteristics and can be used on all construction types. All Force Dalle system assemblies comply with British and European standards and have been approved by the British Board of Agrément under certificate number 15/5222 PS1 including zero fall application. Force Dalle is classified unrestricted by the requirements of the National Building Regulations and deemed Broof(t4) in accordance with BS EN 13501-5:2005 fire classification of construction products and building elements.


Installation of Force Dalle waterproofing systems is carried out by accredited Axtershield Installers whose operatives have successfully attended Axter’s RBM upskilling course. Force Dalle systems can be installed on all deck types, can be fully or partially bonded in a completely flame free, hot air welded or torch applied application on flat roofs, terraces, balconies and podium decks. 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.

20 Year Guarantee

Force Dalle achieves a 20 year insured system guarantee covering materials, design and workmanship, and has a service life in excess of 50 years. A 25 year guarantee will be achieved when installed in a multi-layer system assembly. 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 20


Force Dalle is British Board of Agrément (BBA) certified, is accepted by all third party building warranty providers such as LABC and NHBC, and complies in full with The Building Regulations and all relevant British and harmonised European standards.

More Benefits

  • BBA approved - certificate number 15/5222 PS1
  • Approved Document B: Fire Safety compliant
  • Robust and ultra-fast installation
  • BBA Accredited for use in zero fall cold, warm, and inverted roof applications - See Agrément Certificate No. 15/5222 PS1 or contact technical support [email protected] for further information.
  • BBA Accredited for use in Aquamodul blue roof systems - See Agrément Certificate No. 15/5222 PS1 or contact technical support [email protected] for further information.
  • Resistant to root penetration – BBA accredited for use in extensive, intensive, and biodiverse green roofs. See Agrément Certificate No. 15/5222 PS1 or contact technical support [email protected] for further information.
  • Application versatility - warm roof, inverted roof, cold roof and completely flame free
  • Cost effective alternative to hot melt
  • Manufactured within ISO 9001 and 14001 certified management systems

Force Dalle Neo-Bitumen Flame Free Inverted Roof Single Layer

A completely flame free inverted roof single layer waterproofing system providing fire safety whilst delivering durability and reliability.

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