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Llanelli · Dyfed

Existing insulation and guarantee check in Llanelli

An existing insulation check tells you whether a cavity is filled, what with, whether it looks dry and intact, and how to trace any guarantee. In Llanelli the visit is priced up front, and any follow-on work is quoted separately so you can choose.

Book an insulation check in Llanelli

Covering Llanelli and the SA15 district. Tell us about the property. We confirm the price before you book.

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We use your details only to answer this enquiry and arrange your visit, sharing them only with the registered installer we appoint for your job and the providers named in our privacy notice. No marketing lists, no cold calls.

Existing insulation and guarantee check for Llanelli properties

We cover Llanelli and the SA15 postcode district, including nearby Ammanford and Carmarthen. It is around 14 miles south-east of Carmarthen.

Buyers and sellers in Llanelli often book this check when a survey report or EPC raises questions about the walls. Every inspection point in Llanelli is photographed and logged, so you have a record to show a buyer, lender or contractor.

Local weather affects which walls can be filled. Parts of Dyfed 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 Llanelli, 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.

How to tell if a house already has cavity insulation

Look for a regular pattern of small patched holes in the mortar joints, often about a metre apart. Check the EPC, which may say 'filled cavity'. Ask the seller for a guarantee. The reliable answer is a borescope check, because patched holes can be from a fill that was later removed and EPCs are sometimes wrong.

What is included in Llanelli

  • Borescope checks
  • Guidance on tracing a guarantee
  • Visual check of walls and patched holes
  • Short written report

Guide prices for Llanelli

Existing insulation and guarantee check guide prices
Existing insulation and guarantee check guide pricesGuide price
Existing insulation and guarantee check£145–£245

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.

What happens next for a Llanelli property:

  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.

Existing insulation and guarantee check in Llanelli: questions

How much does an insulation and guarantee check cost in Llanelli?

Guide prices are shown on this page, and the price for your Llanelli property is confirmed before you book.

Do you work on rented homes in Llanelli?

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

Is there VAT on an insulation and guarantee check in Llanelli?

Existing insulation and guarantee check is not insulation, so it is normally charged at the standard rate of VAT. The VAT treatment is confirmed on your quote.

What will I get from an insulation and guarantee check in Llanelli?

A visit at an agreed price, photos of what we find, and a written summary in plain English. Any follow-on work is priced separately so you can choose who does it.

Nearby towns

Book an insulation check in Llanelli

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