Loft insulation in South Glamorgan
For loft insulation anywhere in South Glamorgan, you get a free survey and a fixed written quote.
That includes Cardiff, Barry, Penarth, Cowbridge and Llantwit Major, and the villages around them.
Where we work around South Glamorgan
This takes in the Cardiff and Vale of Glamorgan council areas.
Postcodes starting CF are all inside our area.
| Councils | Cardiff and Vale of Glamorgan |
|---|---|
| Postcode areas | CF |
| Towns listed | 6 |
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.
- Cables lifted clear of the insulation where possible
- Eaves kept clear, with ventilation trays where air could be blocked
- Waste packaging removed
Why book with us in South Glamorgan
Photos of the finished loft
You see the work done without climbing the ladder.
Tidy work
Dust sheets on the route in and every bit of packaging taken away.
Tank and pipes protected
Every insulation job includes a tank jacket and pipe lagging, so nothing freezes in a colder loft.
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 South Glamorgan?
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). The Energy Saving Trust puts a typical professionally installed loft at about £750 from bare joists, or £600 to top up from 120 mm.
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.
Funding in Wales
- Warm Homes Nest, run for the Welsh Government, offers free improvements to eligible low-income households.
- ECO4, the energy supplier scheme, runs until 31 December 2026 for eligible households.
- Check Nest's eligibility checker before agreeing to any funded offer.
Questions about loft insulation in South Glamorgan
Are your prices the same across South Glamorgan?
Yes. Our guide prices are the same everywhere we work, and they include normal travel. Your fixed price depends on your loft, not your postcode.
How do I book a survey in South Glamorgan?
Send the form or call us. We call back to agree a time and confirm it in writing.
How deep should loft insulation be?
The Energy Saving Trust recommends at least 270 mm of mineral wool, and that is the depth we install as standard. Building regulations also set an energy standard for the roof when a loft is insulated. It differs between England, Wales, Scotland and Northern Ireland, so we confirm the target for your address on the quote.
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.
Loft insulation in other towns
Other loft work in South Glamorgan
- Loft insulation top-up in South Glamorgan From £395
- Loft boarding in South Glamorgan From £695
- Insulated loft hatches in South Glamorgan From £245
- Pipe and tank lagging in South Glamorgan From £95
- Loft insulation grants check in South Glamorgan No charge
- Spray foam removal in South Glamorgan From £1,495
- Landlord loft insulation in South Glamorgan From £495
