The house will need to be insulated from the outside. There is a suggested sequence and specification below but this will need to be agreed with the installer and the client. Thermal bridges detailed below.
All solid walls to be insulated
EXISTING FORM / CONDITION
The walls are rendered at the front and rear
Currently 2.06 W/m²K aiming for 0.41 W/m²K
The front of the house has sufficient overhang for the insulation to be fitted underneath. The roofs at the rear of the house are to be extended out to avoid the use of verge trims and allow the use of the green detail below.