Detail for internal wall insulation, continuous to a suspended floor, or an internal floor; accessible from below to be in-filled with insulation; where the existing joists run parallel to the external wall to be insulated.
This Internal wall insulation system uses an intelligent membrane to regulate vapour diffusion. This membrane should continue across intermediate floors, ensuring continuous insulation, vapour-control and air-tightness.
The detail provides information on the packing of joist ends in wall, and air-tightness measures, in order to prevent cold-bridging at junctions between IWI and internal upper floors.
Target wall U-Value: 0.3 W/m²K
Target floor U-Value: 0.2 W/m²K
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