Loft insulation in Northamptonshire

Where we work around Northamptonshire

We work across the Northamptonshire council area.

Postcodes starting LE, MK, NN, OX and PE are all inside our area.

Councils	Northamptonshire
Postcode areas	LE, MK, NN, OX, PE
Towns listed	7

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 second layer goes across the joists at right angles, which covers the timber and stops it acting as a cold bridge. More about loft insulation.

Mineral wool to 270 to 300 mm across the whole loft floor
Tank jacket and pipe lagging in the loft
Area under the cold water tank left clear so it cannot freeze

Why book with us in Northamptonshire

Plain-English advice

We explain what we find in plain English, and say so when nothing needs doing.

Boarding done properly

Storage boards go on loft legs, never straight onto the insulation.

Clear contact details

Your quote says who to call with questions before, during and after the work.

Downlights made safe

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

How much does loft insulation cost in Northamptonshire?

£495 to £745Terraced house, average loft, from bare joists. 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 loft insulation in Northamptonshire

Do you cover the whole of Northamptonshire?

Yes. We cover every town and village in Northamptonshire, including Northampton, Corby and Kettering.

How do I book a survey in Northamptonshire?

Send the form or call us. We call back to agree a time and confirm it in writing.

Can you insulate around downlights?

Recessed downlights need clearance or a fire-rated cover so they do not overheat. We fit covers where needed and leave a clear zone around fittings that cannot be covered.

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.