What It Is
Internal wall insulation (IWI) involves fitting insulation boards or systems to the inner face of external walls. It is used where cavity wall insulation is not suitable, such as solid wall properties or those with narrow or filled cavities.
Why It Matters
Solid wall properties can lose up to 45% of their heat through uninsulated walls. IWI provides a way to dramatically improve thermal performance without altering the external appearance.
- Dramatic improvement for the hardest-to-treat properties
- Preserves external appearance of the building
- Addresses fuel poverty in older housing stock
- Essential for meeting net zero housing targets
Who It's For
What Good Delivery Looks Like
Careful attention to thermal bridging at junctions
Correct vapour control measures
Integration with existing services and openings
Minimal disruption to property occupants
Interested in Internal Wall Insulation?
Discuss your internal wall insulation project. Get in touch to discuss your requirements or request a survey.
Other Services
Delivering a programme rather than a single property? See managed retrofit delivery. To check coverage, see the areas we serve, or read more about how Warm Homes Net Zero Ltd works.