Internal Wall Insulation (IWI)


Internal Wall Insulation (IWI)

Internal wall insulation (IWI)

Internal Wall Insulation is perfect for those who are unable to alter the outside of their home for any reason (for example the building is listed, or the house is in a conservation area and unable to get planning permission), 

Internal wall insulation applies a system onto the internal walls on a room by room basis. This can be done using either a stud sytem with wool batterns and plasterboard or using (PIR) polyisocyanurate insulated plaster boards creating a dry-lined, insulated internal wall. The internal walls are then plastered to leave a smooth and clean surface for redecoration. All fixtures and fittings are generally included within the installation package, with the new wall taking around 10cm of space from the existing wall.


  • Can save approx., £380* per property per year (source: Energy Savings Trust)
  • A warmer house in the winter and cooler in the summer
  • Fully re-plastered and new looking walls
  • Improves the appearance of the property – potentially increasing the property’s value
  • A house with an improved energy rating, the heating bills will be significantly lower
  • Cheaper or even FREE insulation provided by subsided Government or energy supplied schemes


SOLID WALL INSULATION SAVINGS