Period home loft insulation in Gwynedd
We provide loft insulation for an older house across Gwynedd, with a free survey and a fixed written quote.
That includes Bangor (Gwynedd), Caernarfon, Dolgellau, Holyhead and Llangefni, and the villages around them.
Where we work around Gwynedd
We work across the Gwynedd and Isle of Anglesey council areas.
Postcodes starting LL are all inside our area.
| Councils | Gwynedd and Isle of Anglesey |
|---|---|
| Postcode areas | LL |
| Towns listed | 7 |
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.
- Chimney breasts and party walls kept clear of combustibles where flues are live
- Breathable insulation where it suits the building
- Ceiling-safe working from crawl boards
Why book with us in Gwynedd
Plain-English advice
We explain what we find in plain English, and say so when nothing needs doing.
Tank and pipes protected
Every insulation job includes a tank jacket and pipe lagging, so nothing freezes in a colder loft.
Eaves kept clear
Insulation is held back from the eaves so the loft can still ventilate.
Downlights made safe
Fire-rated covers or a clear zone around recessed lights.
How much does loft insulation for an older house cost in Gwynedd?
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).
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 Gwynedd
Do you cover the whole of Gwynedd?
Yes. We cover every town and village in Gwynedd, including Bangor (Gwynedd), Caernarfon and Dolgellau.
How do I book a survey in Gwynedd?
Send the form or call us. We call back to agree a time and confirm it in writing.
What is the best loft insulation for an old house?
Usually a vapour-open material such as sheep's wool or wood fibre, laid so moisture can still move. Mineral wool is also vapour-open and works in many period lofts at lower cost.
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.
