Loft insulation top-up in West Glamorgan

Where we work around West Glamorgan

This takes in the Swansea and Neath Port Talbot council areas.

Postcode areas: SA.

Councils	Swansea and Neath Port Talbot
Postcode areas	SA
Towns listed	6

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
Cross layer to a total of 270 to 300 mm
Eaves ventilation kept clear

Why book with us in West Glamorgan

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.

Downlights made safe

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

Photos of the finished loft

You see the work done without climbing the ladder.

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

£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 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.

Welsh Government: Warm Homes Nest

Questions about a loft insulation top-up in West Glamorgan

How do I book a survey in West Glamorgan?

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

Can you quote for several properties in West Glamorgan?

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

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.