floor perimeter

plinth floor perimeter longford

To avoid disruption inside the building, or in addition to floor insulation, 400mm of external perimeter insulation suitable for below ground use with a drainage layer. 

This is included to reduce thermal bridging and maintain a warmer area underneath the house. Performance target : 0.4 W/m2.K.

plinth floor perimeter

plinth floor perimeter corner view

Further information is available in the Retrofit Pattern Book