Loft insulation for flats in Cardiff
Looking for loft insulation for a flat in Cardiff? We cover Cardiff and the rest of South Glamorgan, with a free survey and a fixed written quote.
We cover the CF10, CF11 and CF24 postcode districts, in the Cardiff council area.

Where we work around Cardiff
We work in neighbouring Penarth, Trowbridge (South Glamorgan), Barry and Cowbridge too.
| Postcode districts | CF10, CF11, CF24, CF5 |
|---|---|
| Council area | Cardiff |
| County or area | South Glamorgan |
What is different about insulating a flat's loft?
In most leasehold flats the loft belongs to the freeholder, so the managing agent or freeholder must agree to the work. Shared lofts usually have fire separation between flats that must not be disturbed. More about loft insulation for a flat.
- Single-flat or whole-block quotes
- Fire compartment walls left intact
- Photos and a completion note for the managing agent or factor
Why book with us in Cardiff
No pressure selling
You get everything in writing and decide in your own time.
Eaves kept clear
Insulation is held back from the eaves so the loft can still ventilate.
Clear contact details
Your quote says who to call with questions before, during and after the work.
Honest about grants
If you might qualify for funding, we tell you before we quote.
How much does loft insulation for a flat cost in Cardiff?
Installing insulation in a home is zero-rated for VAT until 31 March 2027 and 5% after that, under HMRC's rules for energy-saving materials (notice 708/6).
Building regulations in Wales
Wales has its own Approved Document L. Insulation alone is not normally notified, but conversions need building control. How the rules work across the UK.
Rented homes
Privately rented homes in Wales fall under the same minimum energy efficiency rules as England: at least band E now, rising to band C for all tenancies in scope by 1 October 2030.
Questions about loft insulation for a flat in Cardiff
Do you cover all of CF10?
Yes, we cover the CF10 postcode district and the districts around Cardiff.
Can a landlord in Cardiff book work for a tenanted house?
Yes. We can arrange access with the tenant directly and send you photos once the work is finished.
Can you visit Cardiff outside working hours?
Ask about early, late or weekend appointments when you get in touch, and we will tell you honestly what we can offer.
Is there VAT on loft insulation in flats?
Flats are residential, so installing insulation is zero-rated until 31 March 2027.
Who pays for loft insulation in a block of flats?
If the loft is common parts, the freeholder usually arranges it and recovers the cost through the service charge, according to the lease.
