Cavity cleaning and debris removal for Caernarfon properties
If your property is in Caernarfon or the LL55 district or nearby Bangor, Porthmadog and Holyhead, it is within our Gwynedd coverage. It is roughly 6 miles south-west of Bangor.
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. Damp in an insulated Caernarfon home is not always the insulation's fault, so the diagnosis comes before any extraction.
Every elevation is judged on its own exposure. 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.
In terms of approvals, 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.
Why debris matters
A clean cavity lets water that gets through the outer leaf drain away. Debris piled at the base or caught on ties makes a bridge for that water. It is a common cause of damp low on walls and around ties, with or without insulation.
What is included in Caernarfon
- Brick removal at low level
- Raking and vacuum clearance
- Borescope check to locate debris
- Rebuild in matching mortar
Guide prices for Caernarfon
| Cavity cleaning and debris removal guide prices | Guide price |
|---|---|
| Cavity debris clearance, per elevation | £395–£795 |
| Whole-house debris clearance | £995–£1,995 |
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.