Cavity Wall Insulation

Keep the heat in and the cold out

What is cavity wall insulation?

Cavity wall insulation adds insulating material between the inner and outer walls (cavity) of your home.

Homes built after 1930 are more likely to have cavity walls. You can check by looking at your brick pattern.

Cavity walls are insulated by drilling holes into the wall and filling the gap with a special material.

person installing insulation in a house

Benefits of cavity wall insulation

The benefits of air cavity wall Insulation Include:

  • Reduce heat loss through walls
  • Prevent cold air from entering your home
  • Enjoy a more consistent home temperature
  • Prevent dampness which can lead to mould
  • Lower your homes carbon footprint
  • Reduce outside noise & increase your homes value

Disadvantages of cavity wall insulation

The disadvantages of air cavity wall insulation include:

  • Not suitable for every home
  • May cause ventilation issues
  • Not suitable if damp exists
  • If poorly installed can lead to damp issues
  • Longer payback period
  • May not prevent thermal bridging

Is your home suitable for cavity wall insulation?

Cavity wall insulation is suitable for your home if:

  • You have cavity walls with no insulation 
  • You have cavity walls and insulation and have found damp
  • If you have solid walls you can still get help with insulation