Loft InsulationInstallers

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.

Guide price £495 to £845 Cardiff, South Glamorgan
A block of flats with a pitched roof

Where we work around Cardiff

We work in neighbouring Penarth, Trowbridge (South Glamorgan), Barry and Cowbridge too.

Postcode districtsCF10, CF11, CF24, CF5
Council areaCardiff
County or areaSouth 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?

£495 to £845One top-floor flat, from bare joists. Free survey and a fixed written quote before any work.

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).

Work out a guide price for your loft

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.

Loft insulation for flats in other towns

Other loft work in Cardiff

Find out what your loft needs

Free survey and a fixed written quote for installation work. Guide prices first if you prefer.