H1 compliance changes - key challenges

In this free 20-minute module, you’ll learn about achieving or exceeding performance requirements to comply with H1 Energy efficiency using H1/AS1 and H1/VM1 5th edition amendment 1. These documents can be used until 26 November 2026. After that, the 6th edition of H1/AS1 and H1/VM1 must be used.

Topics include:

• What are construction R-values?
• Roofs – sloping and skillion
• Floors – underslab heating and slabs with attached unconditioned spaces
• Windows – compliance and avoid overheating
• Doors – compliance and opaque doors
• Walls – compliance and improved performance
• Secondary insulation – improve performance for walls and roofs