Loft insulation top-up in Gloucestershire

Where we work around Gloucestershire

This takes in the Gloucestershire and South Gloucestershire council areas.

That covers the BS and GL postcode areas.

Councils	Gloucestershire and South Gloucestershire
Postcode areas	BS, GL
Towns listed	8

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.

Gaps in the existing layer filled
Tank jacket and pipe lagging in the loft
Depth check and photos before and after

Why book with us in Gloucestershire

Tank and pipes protected

Every insulation job includes a tank jacket and pipe lagging, so nothing freezes in a colder loft.

Tidy work

Dust sheets on the route in and every bit of packaging taken away.

Honest about grants

If you might qualify for funding, we tell you before we quote.

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 Gloucestershire?

£395 to £545Terraced house, average loft, topping up from about 100 mm. 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). The Energy Saving Trust puts a typical professionally installed loft at about £750 from bare joists, or £600 to top up from 120 mm.

Work out a guide price for your loft

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.

GOV.UK: find ways to save energy in your home

Questions about a loft insulation top-up in Gloucestershire

Are your prices the same across Gloucestershire?

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.

Which council covers my address in Gloucestershire?

Councils in Gloucestershire include Gloucestershire and South Gloucestershire. Your council matters for building control questions and some funding schemes.

Is it worth topping up 100 mm of loft insulation?

Often, if the existing layer is in good condition and you also want a warmer house or a better EPC. On bill savings alone, a top-up from about 100 mm takes decades to pay back, so the case is strongest when it is done alongside other loft work.

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.