Independent insulation comparison across Wales. Cardiff, Swansea, Newport and surrounding areas. Welsh homeowners may qualify for the Warm Homes Programme (Welsh Nest) and other Welsh Government-funded schemes.
Wales has a diverse housing stock ranging from the terraced valleys communities of South Wales, through to rural stone-built farmhouses, Cardiff suburbs and North Wales coastal and rural properties. The South Wales Valleys have a high proportion of older terraced housing with solid-wall construction, presenting similar insulation challenges to Northern England.
Welsh housing tends to have higher proportions of older EPC-rated properties than the UK average, partly due to the high proportion of rural, solid-walled and older stock. Wales also has a higher proportion of off-gas-grid properties than England, making heating efficiency particularly important. The Welsh climate is generally wetter and windier than southern England, increasing the value of effective insulation.
Select your town or city for local insulation costs, postcode coverage and installer information.
Wales has its own energy efficiency funding through the Warm Homes Programme, delivered by Welsh Nest. This provides free or subsidised energy efficiency improvements including insulation and heating for eligible Welsh homeowners and tenants. Contact Home Energy Wales to check eligibility. ECO4 also operates in Wales. The GBIS (Great British Insulation Scheme) closed on 31 March 2026 — Welsh homeowners who applied should contact their supplier about the status of any outstanding applications.
Check eligibility free: Use our quick checker to see which schemes may apply to your household. Takes 30 seconds. No call-centre spam.
Check my eligibility →We provide insulation comparison and installer matching across all Wales postcode areas including:
Can’t see your postcode? Enter it in the form above — we cover all UK postcode areas.
Wales has its own funding through the Warm Homes Programme (Welsh Nest), which provides free energy efficiency improvements for eligible Welsh households including insulation and heating. Contact Home Energy Wales to check eligibility. ECO4 also operates in Wales. GBIS closed in March 2026.
A higher proportion of Welsh homes have solid-wall construction (no cavity) compared to the UK average, which can make insulation more complex and expensive. Internal or external wall insulation is required for these properties. Loft insulation is straightforward for properties with accessible pitched roofs.
Yes. ECO4 applies in Wales as well as England. Welsh homeowners may also access Warm Homes Programme funding through Welsh Nest, which is specific to Wales and operates alongside UK-wide schemes.