External Wall Insulation & Render Specialists
Are you eligible for the Green Homes Grant Scheme?
Get in touch

Internal Wall Insulation Vs External Wall Insulation

Wall insulation can be a great way to improve the efficiency of your home, especially if you have an older, single skinned wall. But, what’s the difference between internal and external insulation? And what are the pros and cons?

What is Internal Wall Insulation?

Internal wall insulation goes on the interior walls of a building. It can be in the form of rigid insulation boards fitted to the wall or it can be insulation such as wool fibre that is installed behind a stud wall.

Internal Wall Insulation Pros

  • Internal Insulation tends to be a cheaper process. However, the cost of redecoration may need to be taken into account.
  • It can be done on a room by room basis, which can make it a less disruptive process.

Internal Wall Insulation Cons

  • Rooms with external walls will have reduced floor space, as area is taken up by the insulation and stud wall.
  • It requires skirting, door frames and even electrical outlets to be removed and refitted, which can add to the cost of the process.
  • It can make it harder to fix heavy items like TV stands to the wall.
  • It can be quite disruptive to people living in the building, as rooms must be emptied for the work to be carried out.
  • Any issues with damp must be fixed before installation.

What is External Wall Insulation?

External wall insulation, as the name would suggest, is insulation that is fixed to the exterior walls of a building. The layer of insulation is then covered with a special render to waterproof and protect it.

External Insulation Pros

  • The insulation can be applied without disturbing residents as it is all done externally.
  • There is no impact on the size of rooms inside the building.
  • The insulation can improve the weatherproofing and sound insulation of your building.
  • Any cracks or gaps in the wall are covered by the insulation, reducing draughts.
  • The lifespan of your walls will be increased as they are protected by the insulation.
  • It can reduce condensation on the internal walls and can prevent damp.

External Insulation Cons

  • You may require planning permission
  • Good access to the external wall is required.
  • External wall insulation may not work if your outer walls are damaged or are not structurally sound.

Overall, external wall insulation allows you to improve the efficiency of your home. Whilst allowing you to keep the size of your rooms. It can also improve the overall look of your house and even increase it’s value. So, if you have any questions about the advantages of external wall insulation, or you are interested in getting a quote for your house, please don’t hesitate to get in touch.

Limited Time

Take advantage of the Green Homes Grant Scheme

You could be eligible for a voucher of up to £10,000 towards making your home more energy efficient.
Back to summit