Draught-proofing for Caernarfon properties
Our Gwynedd coverage takes in Caernarfon (LL55) and nearby Bangor, Porthmadog and Holyhead. It is about 6 miles south-west of Bangor.
In Caernarfon homes this is often done on the same visit as a cavity fill, which saves a second trip. Where a Caernarfon home also has empty cavity walls, we can survey those at the same time.
As for paperwork, if cavity wall insulation follows in Caernarfon, filling a cavity is notifiable work under the Building Regulations as they apply in Wales, usually self-certified through a competent person scheme.
Funding in Wales
In Wales, Warm Homes Nest offers free improvements to eligible low-income households, and ECO4 runs to 31 December 2026.
Sources: Welsh Government: warmer and more energy efficient homes (July 2026); GOV.UK: extending the ECO4 end date, government response.
Ventilation still matters
Trickle vents, air bricks and extractor fans are there for a reason. We seal accidental gaps, not the ventilation your home needs to keep condensation down.
What is included in Caernarfon
- Loft hatch seals
- Skirting and floor gap sealing
- Door and window seals
- Letterbox and keyhole covers
Guide prices for Caernarfon
| Draught-proofing guide prices | Guide price |
|---|---|
| Whole-house draught-proofing | £195–£495 |
| Doors and loft hatch only | £145–£295 |
No VAT is charged on installing insulation in homes until 31 March 2027 (then 5%). Guide ranges only: the fixed price is confirmed in writing before any work starts, and anything that could not be seen at survey is agreed with you first.
From enquiry to finish in Caernarfon:
Get in touch
Online, by phone or WhatsApp.
Survey visit
We check the space, what is there now and how it is ventilated.
Your quote in writing
A fixed price, with any extras listed separately.
Booked work
Carried out by the installer named on your quote.