Wall - External Wall - Cavity Wall (Masonry) - Input Required  help

External Render

NoYes
Outer leaf
Outer leaf thickness mm

Cavity wall insulation

Cavity width

 mm
Inner leaf
Inner leaf thickness mm

Internal Render/Plaster

NoYes

Internal lining system

You can either select an insulation or enter the
target U-value you want to achieve below...

Internal finish/insulation



or Target U-value  W/m²k

Hover over me

Calculate U‑value

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InsulationLayer1CB:
InsulationLayer2CB:
InsulationLayer3CB:

TargetUvalueEC: 0
FloorJoistWidthEC: 38
FloorJoistDepthEC:
FloorJoistCentresEC: 400
WalkingSurfaceCB:
CeilingCB:
PlenumCB:
InnerLeafCB:
InnerLeafThicknessEC:
InnerFinishCB:
OuterLeafThicknessEC:
OuterLeafCB:
OuterFinishCB:
InnerLiningSystemCB:
LowECavityCB:
StudGaugeCB:
StudTypeCB:
StudSizeCB:
WalkingSurfaceThicknessEC: 18
mmDeckThicknessEC: 100
mmScreedThicknessEC: 40
OtherOuterLeafLambdaEC:
OtherInnerLeafLambdaEC:
CavitywidthEC:
Cavitywidth2EC:
OuterFinishThicknessEC:
InnerFinishThicknessEC:
ScreedCB:
OtherOuterLeafNameEC:
OtherInnerLeafNameEC:
TwinFrameCB:
TwinFrameSecondStudDepthEC:
TwinFrameSecondInsulationLayerCB:
TwinFrameStudCentersEC:
TwinFrameCavityWidthEC:
TwinFrameInsulationBetweenFramesEC:
TwinFrameStudTypeEC:
TwinFrameStudGaugeEC:
TwinFrameStudSizeCB:

FloorPerimeterEC:
FloorAreaEC:
POverAEC: