Loft insulation in Cardiff
We fit loft insulation for homes in Cardiff and across South Glamorgan, starting with a free survey and a fixed written quote.
We cover the CF10, CF11 and CF24 postcode districts, inside the Cardiff council area.
Where we work around Cardiff
Other towns close by include Penarth, Trowbridge (South Glamorgan), Barry and Cowbridge.
| Postcode districts | CF10, CF11, CF24, CF5 |
|---|---|
| Council area | Cardiff |
| County or area | South Glamorgan |
What is loft insulation?
We lay the first layer to the depth of the joists, usually 100 mm, so it fills each bay edge to edge with no gaps. The finished depth sits at 270 mm or more, the depth the Energy Saving Trust recommends. More about loft insulation.
- Waste packaging removed
- Mineral wool to 270 to 300 mm across the whole loft floor
- Cables lifted clear of the insulation where possible
Why book with us in Cardiff
Plain-English advice
We explain what we find in plain English, and say so when nothing needs doing.
Tank and pipes protected
Every insulation job includes a tank jacket and pipe lagging, so nothing freezes in a colder loft.
We measure before we quote
Existing depth, joist spacing, wiring and the tank are checked, not guessed.
Fixed written price
The price on the quote is the price you pay. It only changes if you change the job, or if we find something hidden, such as rot, and you agree the change in writing first.
How much does loft insulation 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.
Questions about loft insulation in 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.
How soon can you visit a home in Cardiff?
We call you back to agree a time that suits you, and confirm the date in writing. Availability changes week to week, so we will give you the earliest slot we have.
Do you cover all of CF10?
Yes, we cover the CF10 postcode district and the districts around Cardiff.
Do I need to empty my loft first?
The floor needs to be clear for the insulation to go down. If moving things yourself is difficult, tell us at the survey and we can price clearing and putting items back on raised boarding.
How long does it take to insulate a loft?
Most lofts in houses take a single day. A large bungalow loft, a loft that needs clearing first or one with awkward access can run into a second day.
