Overview of home insulation in the UK
Why insulation is the single most cost-effective energy upgrade for most UK homes, and how it reduces bills, improves comfort and raises your EPC rating.
Types of insulation
Loft, cavity wall, solid wall (internal and external), underfloor and roof insulation explained — what each involves, typical costs and energy savings.
Is my home suitable?
How to tell what insulation your home already has, which types you can add, and common issues with older properties, listed buildings and non-standard construction.
Insulation costs & savings
Typical UK prices for each insulation type, expected annual savings on energy bills, and payback periods with and without grant funding.
Free insulation grants
How to get free or heavily subsidised insulation through ECO4, the Great British Insulation Scheme and LA Flex — eligibility criteria and how to apply.
Loft insulation guide
How loft insulation works, recommended depth (270mm+), DIY versus professional installation, costs and what to do with a loft conversion.
Cavity wall insulation guide
How cavity wall insulation is installed, which homes are suitable, potential damp risks, costs and how to check if your walls are already filled.
Solid wall insulation guide
Internal and external solid wall insulation options, costs, disruption levels, planning considerations and whether the savings justify the investment.
Draught-proofing & ventilation
Low-cost draught-proofing measures, how to balance airtightness with ventilation, and when mechanical ventilation is needed after insulating.
Finding a vetted installer
How to find a TrustMark-registered insulation contractor, what certifications matter, and how to compare quotes from vetted professionals.