Loft insulation top-up in Caernarfon
If you need a loft insulation top-up in Caernarfon, we can help, and it starts with a free survey and a fixed written quote.
That includes addresses in LL55. The local authority is Gwynedd.

Where we work around Caernarfon
As the crow flies, Caernarfon is roughly 9 miles from Bangor (Gwynedd).
We work in neighbouring Llangefni and Bangor (Gwynedd) too.
| Postcode districts | LL55 |
|---|---|
| Council area | Gwynedd |
| County or area | Gwynedd |
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 wet, dirty, matted or full of droppings, laying fresh wool on top just buries the problem, so we say so and price removal instead. More about a loft insulation top-up.
- Depth check and photos before and after
- Eaves ventilation kept clear
- Tank jacket and pipe lagging in the loft
Why book with us in Caernarfon
Downlights made safe
Fire-rated covers or a clear zone around recessed lights.
Honest about grants
If you might qualify for funding, we tell you before we quote.
Tidy work
Dust sheets on the route in and every bit of packaging taken away.
We measure before we quote
Existing depth, joist spacing, wiring and the tank are checked, not guessed.
How much does a loft insulation top-up cost in Caernarfon?
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 a loft insulation top-up in Caernarfon
How soon can you visit a home in Caernarfon?
We call you back to agree a time that suits you, and confirm the date in writing. Availability changes week to week, so we will give you the earliest slot we have.
Do you cover all of LL55?
Yes, we cover the LL55 postcode district and the districts around Caernarfon.
Can you visit Caernarfon outside working hours?
Ask about early, late or weekend appointments when you get in touch, and we will tell you honestly what we can offer.
Which way should the top-up layer run?
Across the joists, at right angles to the first layer. That covers the tops of the joists, which otherwise let heat escape along the timber.
Can I still store things in the loft after a top-up?
Not directly on the insulation. A 270 mm layer stands well above the joists, so storage needs raised boarding on loft legs.
