Loft insulation top-up in Wiltshire
For a loft insulation top-up anywhere in Wiltshire, you get a free survey and a fixed written quote.
Towns we cover include Swindon, Salisbury, Trowbridge (Wiltshire), Chippenham and Melksham.
Where we work around Wiltshire
We work across the Wiltshire and Swindon council areas.
Postcodes starting BA, SN and SP are all inside our area.
| Councils | Wiltshire and Swindon |
|---|---|
| Postcode areas | BA, SN, SP |
| Towns listed | 9 |
What is a loft insulation top-up?
Before we quote we measure the existing layer in several places and check its condition. If it is dry, even and not contaminated, we keep it and lay the top-up across it at right angles. More about a loft insulation top-up.
- Eaves ventilation kept clear
- Cross layer to a total of 270 to 300 mm
- Gaps in the existing layer filled
Why book with us in Wiltshire
Tank and pipes protected
Every insulation job includes a tank jacket and pipe lagging, so nothing freezes in a colder loft.
Honest about grants
If you might qualify for funding, we tell you before we quote.
Tidy work
Dust sheets on the route in and every bit of packaging taken away.
Plain-English advice
We explain what we find in plain English, and say so when nothing needs doing.
How much does a loft insulation top-up cost in Wiltshire?
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 England
In England, a loft insulated across more than half its area should reach a U-value of 0.16 W/m²K. Insulation alone is not usually notified to building control. How the rules work across the UK.
Funding in England
- ECO4, the energy supplier scheme, runs until 31 December 2026 for eligible households, with no supplier scheme to follow it.
- The Great British Insulation Scheme closed on 31 March 2026.
- The Warm Homes Plan, announced in January 2026, funds upgrades for low-income households, including through councils under Warm Homes: Local Grant.
- Check what is open for your address on GOV.UK before agreeing to any funded offer.
Questions about a loft insulation top-up in Wiltshire
How do I book a survey in Wiltshire?
Send the form or call us. We call back to agree a time and confirm it in writing.
Are your prices the same across Wiltshire?
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.
Can I still store things in the loft after a top-up?
Not directly on the insulation. A 270 mm layer stands well above the joists, so storage needs raised boarding on loft legs.
Can new insulation go on top of old insulation?
Yes, if the old layer is dry, clean and reasonably even. If it is damp, contaminated or badly compressed we recommend removing it first.
