New-build loft insulation in Gwynedd
We cover Gwynedd for trade loft insulation. It starts with per-plot pricing to your specification.
Towns we cover include Bangor (Gwynedd), Caernarfon, Dolgellau, Holyhead and Llangefni.

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 |
How does trade loft insulation work?
For new dwellings and extensions, the insulation has to match the design that achieved compliance, so we work from your SAP or U-value calculation and the specified product. We can install between and over the ceiling ties, fit eaves ventilation trays and loft hatches, and leave a boarded access route to services. More about trade loft insulation.
- Eaves trays and hatch upstands
- Supply and fit to your specification
- Photo evidence for building control
Why book with us in Gwynedd
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.
Photo evidence
Each stage is photographed against the specification for building control.
Tidy work
Dust sheets on the route in and every bit of packaging taken away.
Clear contact details
Your quote says who to call with questions before, during and after the work.
How much does trade loft insulation cost in Gwynedd?
Trade prices are shown before any VAT. Work on new dwellings is normally zero-rated; extensions and refurbishment are normally standard-rated, and the construction reverse charge may apply. Each quote shows the VAT treatment.
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 trade loft insulation in Gwynedd
Do you cover the whole of Gwynedd?
Yes. We cover every town and village in Gwynedd, including Bangor (Gwynedd), Caernarfon and Dolgellau.
Can you quote for several properties in Gwynedd?
Yes. Landlords and agents can send a list of addresses and we will survey them in as few visits as we can.
Do you work as a subcontractor?
Yes. We quote per plot or per job and work to your programme and site rules.
Which products do you fit?
Whatever the specification calls for, usually mineral wool rolls or loose fill, so the as-built matches the SAP calculation.
