Cavity wall insulation removal for Caernarfon properties
Caernarfon sits in Gwynedd, about 6 miles south-west of Bangor. We work across the LL55 district, including nearby Bangor, Porthmadog and Holyhead.
Damp in an insulated Caernarfon home is not always the insulation's fault, so the diagnosis comes before any extraction. Defects such as failed pointing, leaking gutters and bridged damp-proof courses are listed and priced separately for Caernarfon properties, so you can choose who fixes them.
Before any material is chosen, exposure is checked. Parts of Gwynedd face some of the heaviest wind-driven rain in the UK, especially exposed coastal and upland sites. Here the survey is stricter: some walls suit only certain certified systems, and some should not be filled at all.
On compliance, 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.
Rules in Wales
Filling a cavity is notifiable work under the Building Regulations as they apply in Wales, usually self-certified through a competent person scheme if insulation work follows.
Sources: Welsh Government: building work competent person schemes; CIGA: CWISC competent person scheme.
If you have a guarantee
Contact your original installer first. If that does not resolve it within two months, CIGA's process applies for CIGA-guaranteed installs. Removing insulation yourself can void a guarantee, so speak to the provider before work.
What is included in Caernarfon
- Damp investigation and borescope diagnosis first
- Camera check before rebuild
- Waste disposal
- Full extraction and cavity clean
Guide prices for Caernarfon
| Cavity wall insulation removal guide prices | Guide price |
|---|---|
| Detached house | £2,595–£4,195 |
| Semi-detached house | £1,695–£2,795 |
| End-terrace house | £1,395–£2,395 |
| Detached bungalow | £1,395–£2,395 |
| Semi-detached bungalow | £1,195–£1,695 |
| Mid-terrace house | £1,195–£1,595 |
This work is not insulation, so it is normally standard-rated for VAT. Guide prices include VAT where it applies. 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.
How it works in Caernarfon:
Tell us what is happening
Postcode, property type and what you have noticed.
Price agreed first
We confirm the price before anyone visits.
Visit and checks
Photos and readings at the areas that matter.
Findings in writing
What we found and the options, each priced separately.