Internal wall insulation

The Home Upgrade Grant can fund Internal wall Insulation for properties with an EPC rating of D, E, F and G and which do not have gas central heating.

Key points to consider:

  • Cost
    Internal wall insulation is generally cheaper to install than external wall insulation
  • Floor Space
    Internal wall insulation can slightly reduce the floor area of a room. The thickness of the insulation is around 100mm
  • Requirements for fitting
    Can be disruptive to daily life as work is needed inside, however, this can be done room by room and will require skirting boards, door frames and external fittings to be removed and reattached
  • Consider wall fittings
    Installing internal wall insulation can make it hard to fix heavy items to inside walls - although special fixings are available
  • Checks beforehand
    Note that any existing problems with penetrating or rising damp need to be fixed first