Areas covered
Property assessment and installation are arranged by postcode across Wales. Major service areas:
Housing in Wales and what it means for insulation
The Valleys are terrace country: long rows of Victorian stone and brick houses with slate roofs and solid walls. Cardiff, Swansea and Newport add Edwardian suburbs, inter-war semis and post-war estates; North Wales brings coastal bungalows, holiday homes and older rural stock. Exposure and rainfall make ventilation and moisture the first question, and Welsh Building Regulations differ from England's in places.
Common insulation projects in the region
- Valleys terrace loft conversions
- Slate-roof insulation and ventilation checks
- Coastal bungalow lofts in North Wales
- Cardiff and Swansea inter-war semi loft rooms
- Spray foam replacement across South Wales
What we see across Wales
- Valleys terrace loft conversions
- Ventilation and moisture in slate roofs
- Coastal bungalow lofts
- Spray foam replacement
Qualitative pattern from the housing stock; replaced with aggregated, anonymised enquiry data as it builds.
Valleys terraces and Welsh regulations
Steep slate roofs on shallow rafters in long terrace rows, solid stone walls, exposure and rain — plus a Welsh Building Regulations regime that differs from England's in places — shape every specification.
Why foil may suit some homes here
Valleys terraces with steep slate roofs and shallow rafters are a common multifoil case when the loft is to become a room. The decision rests on the whole roof build-up — rafter depth, ventilation, moisture, existing insulation and intended use — not on material thickness alone. Foil insulation guide.
Why foil may not suit others
Solid stone walls need breathable, designed systems; foil is not the wall answer here. A straightforward cold loft with good access is often more appropriately upgraded with conventional mineral-wool loft insulation than a rafter-level foil system, and we say so when it is.
Field team
Wales Field Team
Supporting homeowners across Cardiff, Swansea, Newport, Wrexham, Bridgend, Llanelli, Bangor and surrounding areas with property assessment to one national standard.
How it works in Wales
- Enter your postcodeWe tell you the coverage position for the area before asking for anything else.
- Tell us about the propertyType, what you want to improve, what is there now, the main problem.
- Property assessmentWhere a physical inspection is needed: roof and loft construction, existing insulation, ventilation, moisture, depth, access.
- RecommendationFoil, multifoil or an alternative — chosen for the property, not the search term.
- QuoteFixed price with the build-up, product, certificate and inclusions stated.
- InstallationAllocated to appropriate installation capacity, photographed and recorded to one standard.
What foil insulation costs in Wales
We do not publish invented regional prices. What moves a quote here is the same as anywhere else:
- property size and roof area
- access to the loft or roof space
- what insulation is there now and whether it stays
- the system selected — multifoil alone, multifoil with PIR, or an alternative
- preparation work, including removal of old material or spray foam
- ventilation and detailing at eaves, dormers and penetrations
National indicative ranges are in the foil insulation cost guide; as genuine project data from Wales builds, regional ranges will be published here.
Recent foil insulation projects in Wales
Documented projects in Wales are added to the project library as they complete — property, survey findings, system chosen and why, duration and photographs. Until then the library's typical project scenarios show how the housing described above is assessed.
Professional installation
Installation is arranged through the national foil insulation installer page: survey first, written build-up, fixed quote, one standard. How installers are matched.