Internal Wall Insulation
Insulate from the inside where external work isn’t possible.
What it is & how it works
Internal Wall Insulation (IWI) is applied to the inside face of external walls, making it ideal where external insulation isn’t suitable — for example on listed buildings, in conservation areas or where access is limited. Using insulated plasterboard or a built-up system, IWI significantly reduces heat loss through solid walls while retaining your home’s external appearance.
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Why Internal Wall Insulation is a smart upgrade
Reduce heat loss through solid walls
Retains the original external appearance of the property
Ideal for conservation areas and listed buildings
Improves comfort and reduces cold spots
Available through funded retrofit schemes
How Vista MCI delivers your internal wall insulation
Survey
We assess each room, moisture risk and the most suitable IWI system.
Design & Funding
Specified to PAS 2035 with condensation and ventilation carefully managed.
Installation
Insulated boards installed and finished ready for redecoration.
Handover
Full inspection and guidance on ventilation and aftercare.
Wonderful service, everyone was lovely and we're so thrilled with the results — a total game changer.
Interested in Internal Wall Insulation?
Request a free survey and we’ll check your eligibility for funding and show you the savings on offer.