Viking's Warmspan² system is a fully-compliant, engineered warm roof solution that is the result of having analysed every possible component and installation method, to arrive at the most cost-effective, design-flexible, compliant, membrane warm roof assembly — that meets H1 (5th edition).

Warmspan² is a complete roof assembly with prescribed joist spacings and substrate-types included in its specification. Listed from the top-up, these are the system’s fundamental components:

• 1. One of Viking's CodeMark Membrane Systems (Enviroclad or Viking Torch-on)
• 2. Coverboard
• 3. Viking Insulated Plugs and Fasteners
• 4. PIR — Rigid insulation panels (foil-faced PIR board)
• 5. Self-adhered Vapour Barrier (Self-sealing SBS bitumen)
• 6. 17mm T & G Plywood (H1.2 minimum treatment) or Steel tray substrate (ST7, ST900, or Metcom 7)
• 7. Structural Supports (max. 900mm centres for ply substrate; 1800mm centres for steel tray)