1. Floor Insulation

Install insulation under floor during building stage.

  • Underfloor Heating

Where an underfloor heating system (e.g. in-screed, under laminate heating, under carpet heating, under-tile heating, cut-in under floor heating, and water-based under floor heating) is installed, the floor shall be insulated with insulation that has a minimum R-value of not less than 1,0 such as to prevent heat loss to ground.

  • Insulated Floor Slab

  • Rigid Insulation Board Examples

     Typical data and deemed-to-satisfy thicknesses of generic rigid board insulation products
    Energy Zones
    1, 2 , 6 & 7
    Minimum required Total

    R-value(m².K/W)

    1
    Example of Product Density k-value Recommended levels (thickness in mm) of Thermal Insulation to be used equivalent to R-Value required. Thermal conductivity values used are generic.
    Expanded Polystyrene (EPS) Standard Density (SD) 15 0,035 35
    Extruded Polystyrene (XPS) 32 0,030 30
    Polyisocyanurate (PIR) Rigid Foam Board 34 0.024 25
    Polyurethane (PUR) Rigid Foam Board 34 0.024 25
  • Suspended Floors

A suspended floor that is part of a building’s envelope shall have insulation that will retain its thermal properties under moist conditions and be installed and achieve the following R-values:

  • a total R-value of 1.5 for Energy Zones 1, 2, 6 and 7, and
  • a total R-value of 1.00 for Energy Zones 3, 4 and 5.

Non-combustible Insulation Examples

  • Glass wool
  • Mineral wool
  • Rock wool
  • Stone wool