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South Glamorgan · Wales

Damp investigation after cavity insulation in South Glamorgan

For homes, landlords and businesses in South Glamorgan, a damp investigation comes with a clear price and a plain-English record. A damp investigation finds out why an insulated wall is showing damp or mould: rain getting in through defects, bridged or wet fill, debris in the cavity, a breached damp-proof course, or condensation.

Moisture meter held against a damp, mould-spotted corner of an external wall indoors

Book a damp investigation in South Glamorgan

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Damp investigation after cavity insulation across South Glamorgan

We cover 3 towns in South Glamorgan: Cardiff, Barry and Penarth.

Before any material is chosen, exposure is checked. Parts of South Glamorgan 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.

Damp in an insulated South Glamorgan 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 South Glamorgan properties, so you can choose who fixes them.

Building Regulations in Wales

In Wales, filling an existing cavity is also notifiable building work under the Building Regulations as they apply in Wales. A registered installer normally self-certifies it through a competent person scheme; otherwise a building notice goes to your council's building control before work starts. Welsh rules can differ from England's, so the notification route is confirmed in writing on your quote.

Sources: Welsh Government: building work competent person schemes; CIGA: CWISC competent person scheme; Welsh Government: issues arising from cavity wall insulation installations.

What you get

Moisture readings, borescope photos at the affected areas, an explanation of the likely cause and the options, from simple repairs to partial or full extraction, each priced.

What is included

  • Moisture mapping inside
  • External defects check
  • Borescope at affected areas
  • Cause and options in writing

Damp investigation after cavity insulation prices in South Glamorgan

Damp investigation after cavity insulation guide prices
Damp investigation after cavity insulation guide pricesGuide price
Damp investigation with borescope£295–£495

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 South Glamorgan:

  1. Get in touch

    Online, by phone or WhatsApp.

  2. Your price

    Confirmed in writing before you book.

  3. The visit

    Carried out at an agreed time, with photos of what we find.

  4. Your report

    Plain English, with any follow-on work quoted separately.

Last reviewed 19 October 2026.

Damp investigation after cavity insulation in South Glamorgan: questions

Do you cover all of South Glamorgan?

Yes. We cover 3 towns across South Glamorgan, including Cardiff and Barry and Penarth, and the villages around them. Island and remote addresses are surveyed by arrangement.

What will I get from a damp investigation in South Glamorgan?

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.

How soon can you visit in South Glamorgan?

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.

Is there VAT on a damp investigation in South Glamorgan?

Damp investigation after cavity insulation is not insulation, so it is normally charged at the standard rate of VAT. The VAT treatment is confirmed on your quote.

Damp investigation after cavity insulation in nearby areas

Book a damp investigation in South Glamorgan

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