Field help: Thermal insulation of walls

Enter the costs for wall insulation.

Wall insulation involves the initial installation or renewal of external components of existing buildings and is eligible for tax incentives.

This includes:

• Insulation of external walls,
• Cavity wall insulation,
• Insulation of external walls of listed buildings and buildings of historical interest,
• Internal insulation of timber-framed external walls and renewal of infill,
• Insulation of walls against unheated rooms,
• Insulation of walls against the ground.