Psi Value Calculator

Materials that will be constant
Brick 0.770 (Thermal Conductivity)
Mortar 0.400
Lintel Steel 50.00
GRP 0.200
Sealant 0.350
Plaster Dabs 0.4
Plaster Board 0.190
Plaster Dab Airspace 0.067

Calculations where partial fill insulation
is used assume a minimum clear cavity of 50mm.

Wall Construction incorporating Hi-Therm Lintel.

External Leaf

Cavity Width

Cavity Fill

Insulation

Internal Leaf

Brick 0.770
  • cavity
    • 100mm
    • 125mm
    • 150mm
  • fill
    • Full Fill
    • Partial Fill
  • insulation
    • Mineral wool 0.034 W/mK
    • Mineral wool 0.037 W/mK
    • Pumped Bead 0.033 W/mK
    • Rigid Insulation Board < 0.022 W/mK
  • internal
    • Aerated block < 0.110 Conductivity
    • Aerated block < 0.150 Conductivity
    • Aerated block < 0.190 Conductivity
    • Dense block < 1.33 Conductivity
    • Lightweight aggregate block < 0.600 Conductivity
    • Lightweight aggregate block < 0.649 Conductivity
    • Ultra lightweight aggregate block < 0.280 Conductivity
    • Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.054
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Partial fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.068
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Partial fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.077
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Partial fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.052
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Partial fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Partial fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.076
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Partial fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.051
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Partial fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Partial fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.076
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Partial fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.048
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.600

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.600

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.600

  • Psi Value
    0.048
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.048
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Partial fill

    Low Emissivity Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.036
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Pumped Bead 0.033 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.047
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Pumped Bead 0.033 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.053
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Pumped Bead 0.033 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.034
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Pumped Bead 0.033 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.045
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Pumped Bead 0.033 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.052
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Pumped Bead 0.033 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.032
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Pumped Bead 0.033 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.044
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Pumped Bead 0.033 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.051
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Pumped Bead 0.033 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.030
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Pumped Bead 0.033 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.043
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Pumped Bead 0.033 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Pumped Bead 0.033 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.030
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Pumped Bead 0.033 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.043
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Pumped Bead 0.033 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Pumped Bead 0.033 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.028
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Pumped Bead 0.033 W/mK

    Lightweight aggregate block < 0.600 Conductivity

  • Psi Value
    0.042
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Pumped Bead 0.033 W/mK

    Lightweight aggregate block < 0.600 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Pumped Bead 0.033 W/mK

    Lightweight aggregate block < 0.600 Conductivity

  • Psi Value
    0.028
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Pumped Bead 0.033 W/mK

    Lightweight aggregate block < 0.649 Conductivity

  • Psi Value
    0.042
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Pumped Bead 0.033 W/mK

    Lightweight aggregate block < 0.649 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Pumped Bead 0.033 W/mK

    Lightweight aggregate block < 0.649 Conductivity

  • Psi Value
    0.028
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Pumped Bead 0.033 W/mK

    Dense block < 1.33 Conductivity

  • Psi Value
    0.042
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Pumped Bead 0.033 W/mK

    Dense block < 1.33 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Pumped Bead 0.033 W/mK

    Dense block < 1.33 Conductivity

  • Psi Value
    0.036
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.036
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.037 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.047
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.047
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.037 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.053
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.034 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.053
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.037 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.034
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.034
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.037 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.045
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.045
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.037 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.052
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.034 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.052
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.037 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.032
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.032
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.037 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.044
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.044
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.037 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.051
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.034 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.051
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.037 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.030
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.030
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.037 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.043
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.043
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.037 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.034 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.037 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.030
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.030
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.043
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.043
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.034 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.037 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.028
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Lightweight aggregate block < 0.600 Conductivity

  • Psi Value
    0.028
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Lightweight aggregate block < 0.600 Conductivity

  • Psi Value
    0.042
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Lightweight aggregate block < 0.600 Conductivity

  • Psi Value
    0.042
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Lightweight aggregate block < 0.600 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.034 W/mK

    Lightweight aggregate block < 0.600 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.037 W/mK

    Lightweight aggregate block < 0.600 Conductivity

  • Psi Value
    0.028
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Lightweight aggregate block < 0.649 Conductivity

  • Psi Value
    0.028
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.037 W/mK

    Lightweight aggregate block < 0.649 Conductivity

  • Psi Value
    0.042
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Lightweight aggregate block < 0.649 Conductivity

  • Psi Value
    0.042
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.037 W/mK

    Lightweight aggregate block < 0.649 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.034 W/mK

    Lightweight aggregate block < 0.649 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.037 W/mK

    Lightweight aggregate block < 0.649 Conductivity

  • Psi Value
    0.028
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.034 W/mK

    Dense block < 1.33 Conductivity

  • Psi Value
    0.028
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Mineral wool 0.037 W/mK

    Dense block < 1.33 Conductivity

  • Psi Value
    0.042
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.034 W/mK

    Dense block < 1.33 Conductivity

  • Psi Value
    0.042
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Mineral wool 0.037 W/mK

    Dense block < 1.33 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.034 W/mK

    Dense block < 1.33 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Mineral wool 0.037 W/mK

    Dense block < 1.33 Conductivity

  • Psi Value
    0.036
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.045
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.110 Conductivity

  • Psi Value
    0.035
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.045
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.150 Conductivity

  • Psi Value
    0.034
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.044
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.049
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Aerated block < 0.190 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.280 Conductivity

  • Psi Value
    0.050
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultra lightweight aggregate block < 0.310 Conductivity

  • Psi Value
    0.048
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.600

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.600

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.600

  • Psi Value
    0.048
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.048
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    100mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.067
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    125mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649

  • Psi Value
    0.075
    W/m2K

    Wall Construction Selected

    Cavity width:

    Cavity fill:

    Insulation:

    Internal leaf:

    150mm

    Full fill

    Rigid Insulation Board < 0.022 W/mK

    Ultralight Weigth aggregate blocks 0.649


How it works

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