What is Internal Wall Insulation?

Internal Wall Insulation (IWI), an effective solution for enhancing a building’s energy efficiency and comfort, involves applying insulating material directly to the interior surfaces of external walls. This technique minimizes heat loss and often includes a finishing layer, like plasterboard, for added thermal and acoustic benefits.

Internal Wall Insulation is particularly suitable for older properties, homes with limited external space, or those in densely populated areas, especially when solid walls or other factors make external insulation impractical.

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What properties can Internal Wall Insulation be carried out on?

Although any property and wall type can benefit from this insulation, it is most suitable for solid walls, as cavity walls are better suited to cavity wall insulation.

Will Internal Wall Insulation make rooms smaller?

Internal wall insulation will only decrease room size by 100-130mm, while also reducing energy costs and increasing property value. An additional benefit is that, unlike external wall insulation, the exterior appearance of your property will be unchanged.

What is the cost of Internal Wall Insulation?

The cost of installing internal wall insulation is determined by the number of rooms and wall size. Kitchens and bathrooms are generally not insulated due to the homeowner expense of clearing the walls for installation. Our installers provide a 25-year guarantee on all internal wall insulation work. We partner with various funding streams to help cover costs if you qualify.