Period home loft insulation in South Glamorgan

Homes and buildings across South Glamorgan can book loft insulation for an older house, starting with a free survey and a fixed written quote.

That includes Cardiff, Barry, Penarth, Cowbridge and Llantwit Major, and the villages around them.

Guide price £995 to £1,495 South Glamorgan

Where we work around South Glamorgan

Council areas covered: Cardiff and Vale of Glamorgan.

Postcode areas: CF.

Councils	Cardiff and Vale of Glamorgan
Postcode areas	CF
Towns listed	6

What is different about insulating an older home's loft?

We work from crawl boards spanning several joists so the ceilings are not loaded, check for loose plaster keys before anything is laid, and usually recommend vapour-open insulation such as sheep's wool or wood fibre. Unfelted slate roofs are naturally well ventilated, but they let in wind-driven rain and snow, which the insulation has to cope with. More about loft insulation for an older house.

Breathable insulation where it suits the building
Ceiling-safe working from crawl boards
Chimney breasts and party walls kept clear of combustibles where flues are live

Why book with us in South Glamorgan

Tank and pipes protected

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

Clear contact details

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

Boarding done properly

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

No pressure selling

You get everything in writing and decide in your own time.

How much does loft insulation for an older house cost in South Glamorgan?

£995 to £1,495Terraced house, average loft, natural fibre; mineral wool, where it suits, costs less. 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).

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.

Questions about loft insulation for an older house in South Glamorgan

Can you quote for several properties in South Glamorgan?

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

Are your prices the same across South Glamorgan?

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 loft insulation damage lath-and-plaster ceilings?

It can if people kneel between joists or if the ceiling is already weak. We work from boards and check the ceiling first.

Do I need permission to insulate a listed building's loft?

Possibly. Listed building consent is needed for works that affect the building's character. Ask your council's conservation officer.