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Internal Wall Insulation, or IWI, is a great option in solid wall properties where external insulation is not practical. For example, with listed buildings and conservation areas where you wish to preserve the look of the building. Or where access restricts external work and in flats, where internal insulation is the only solution. It is an effective way to improve your energy efficiency, reduce your energy bills and create a more comfortable home.

There are a couple of methods to insulate a solid wall internally. Each will decrease the floor space of a room (as per the thickness of the insulation board or stud wall you use). We recommend you get a professional in to complete this type of work, and you do not undertake it as DIY unless you are very experienced.

Advantages of Internal Wall Insulation

  • Reduced heat loss - improved energy efficiency and, consequently, reduced energy bills

  • Makes your home a more comfortable temperature all year round

  • No problems with changes to the exterior of your home

  • No planning permission required

  • Convenient to install if already refurbishing the interior of your home

  • Suitable for flats and apartments where the exterior cannot be changed

Different types of Insulation

Not all types of Internal Insulation are the same. When you contact one of our experts, we will assist you in deciding which type of insulation will be best to transform your home. The different types of insulation include:


  • Bonded Composite Insulation Boards

These are fitted and bonded directly to your wall in sections. Composite insulation boards take up less floor space, and are generally thinner than framed dry lining systems, so are great when space is at a premium. 

  • Foil Quilt Insulation (also called Super Quilt)

This was designed by NASA for the space programme, and is used in lofts and on wall framed systems. 

  • Framed Dry Lining Wall Insulation

This can be fitted to a wooden, metal or composite framework on your wall and either insulation fitted onto the framework or to the inside between the vertical timbers forming the wall frame. In all cases it is advisable to use a special damp-proof insulation panel. This overcomes the challenges of dealing with walls that are in very poor condition, where composite boards just wouldn’t be effective and there is a high risk of condensation forming

Considerations with IWI

  •  Internal Wall Insulation does not solve problems with condensation

  • It can actually cause condensation and mould to form between the brickwork and the insulation panels if not properly ventilated

  • Internal Insulation does reduce the internal space of your rooms

  • External surfaces of your home will still need work to reduce water ingress into your home

  • Does not provide any added protection from weather or temperature change

If you are interested, please don't hesitate and CONTACT US now to arrange a free consultation with a member of our team of experts.
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