Engineer wearing a yellow hard hat installing internal wall insulation.

Internal Wall Insulation

Insulating solid walls internally is a more economical and cost-effective choice compared to installing external wall insulation. Internal Wall Insulation can also be installed room by room, offering better control and easier management of your insulation efforts.

Han wearing a red glove installing internal wall insulation.

What is Internal Wall Insulation?

Internal Wall Insulation is a measure that involves adding rigid insulation boards to the existing surfaces of internal walls. Alternatively, insulation can be added by constructing a studded wall and directly inserting insulation.

Internal Wall Insulation works by absorbing heat from both inside and outside the property during the day, functioning as a heat collector. The warmth is then stored within the walls of your home.

The main outcome is to enhance thermal efficiency, decrease energy usage, improve door comfort, and mitigate heat loss.  

How much can I save?

The Energy Savings Trust estimate the following annual savings for homeowners:

  • Approximately £550 for detached houses
  • Up to £315 for semi-detached properties
  • Around £185 for mid-terraced homes

Use our eligibility checker below and calculate your estimated savings now. 

Engineer wearing a red cap installing internal wall insulation.