Loft insulation top-up in West Sussex

Where we work around West Sussex

We work across the West Sussex council area.

That covers the BN, GU, PO and RH postcode areas.

Councils	West Sussex
Postcode areas	BN, GU, PO, RH
Towns listed	12

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.

Tank jacket and pipe lagging in the loft
Cross layer to a total of 270 to 300 mm
Eaves ventilation kept clear

Why book with us in West Sussex

Honest about grants

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

Downlights made safe

Fire-rated covers or a clear zone around recessed lights.

Eaves kept clear

Insulation is held back from the eaves so the loft can still ventilate.

Tank and pipes protected

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

How much does a loft insulation top-up cost in West Sussex?

£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 West Sussex

Can you quote for several properties in West Sussex?

Yes. Landlords and agents can send a list of addresses and we will survey them in as few visits as we can.

Do you cover the whole of West Sussex?

Yes. We cover every town and village in West Sussex, including Crawley, Worthing and Bognor Regis.

Which way should the top-up layer run?

Across the joists, at right angles to the first layer. That covers the tops of the joists, which otherwise let heat escape along the timber.

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.