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Caernarfon · Gwynedd

Wall tie replacement in Caernarfon

Caernarfon homeowners, buyers, landlords and agents can book wall tie replacement with the price agreed first. Wall tie replacement fixes the outer and inner leaves of a cavity wall back together where the original ties have corroded.

Book a wall tie inspection in Caernarfon

Covering Caernarfon and the LL55 district. Tell us about the property. We confirm the price before you book.

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Wall tie replacement 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 about 6 miles south-west of Bangor.

Where a Caernarfon wall does need work, bricks are lifted and rebuilt in matching mortar, and the cavity is checked with a camera before it is closed up. 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.

Signs of wall tie failure

Horizontal cracks in mortar joints at regular vertical intervals, bulging brickwork, or lifting of the roof verge. Older galvanised ties, especially in walls built before the 1980s, are the usual suspects.

What is included in Caernarfon

  • Isolation or removal of old ties where needed
  • Tie inspection with metal detector and borescope
  • Remedial stainless ties to a set pattern
  • Making good

Guide prices for Caernarfon

Wall tie replacement guide prices
Wall tie replacement guide pricesGuide price
Remedial wall ties, detached house£1,995–£3,495
Remedial wall ties, semi-detached house£1,495–£2,495
Remedial wall ties, terraced house£995–£1,795

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.

From enquiry to finish in Caernarfon:

  1. Tell us what is happening

    Postcode, property type and what you have noticed.

  2. Price agreed first

    We confirm the price before anyone visits.

  3. Visit and checks

    Photos and readings at the areas that matter.

  4. Findings in writing

    What we found and the options, each priced separately.

Last reviewed 19 October 2026.

Wall tie replacement in Caernarfon: questions

How soon can you visit in Caernarfon?

We arrange dates when you get in touch. Availability varies through the year, so we give you real dates rather than a promise on the website.

Do you work on rented homes in Caernarfon?

Yes. Landlords and agents in Caernarfon can book batch visits, and work is arranged around tenants.

Will you tell me if I do not need any work?

Yes. If the findings show nothing needs doing, or a cheaper fix such as clearing a gutter will do, we say so.

Is there VAT on wall tie replacement in Caernarfon?

Wall tie replacement is not insulation, so it is normally charged at the standard rate of VAT. The VAT treatment is confirmed on your quote.

Nearby towns

Book a wall tie inspection in Caernarfon

Priced before you book. Findings in writing. No cold calls.