Registered Construction Detail A - Ground floor junction

E5 Ground Floor Junction with an External Wall E5MCPF16

This junction can account for up to 34% of heat loss through thermal bridging so it is important to ensure the materials specified in the detail are used and positioned exactly as detailed. Attention to detail will ensure you meet Part L of the Building Regulations. There are actually 66 different construction details you can use in this situation, each one having unique Psi values provided by the material manufacturer to ensure compliance when using SAP software. As a result, not only is it important to position the materials exactly as the Detail but it is crucial that the specified materials are used (even if they are not in stock at the builder’s merchant).

The registration number tells us it is detail number E5, that masonry has been used and the cavity has partial fill insulation.

Key construction point

•    Ensuring continuity of perimeter insulation and damp proof membrane particularly around door openings.

Registered Construction Detail A - Ground floor junction