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Rhondda · Mid Glamorgan

Damp investigation after cavity insulation in Rhondda

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. In Rhondda the visit is priced up front, and any follow-on work is quoted separately so you can choose.

Book a damp investigation in Rhondda

Covering Rhondda and the CF43 district. Tell us about the property. We confirm the price before you book.

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Damp investigation after cavity insulation for Rhondda properties

We cover Rhondda and the CF43 postcode district, including nearby Tonypandy, Aberdare and Pontypridd. It is around 12 miles north-east of Bridgend.

Defects such as failed pointing, leaking gutters and bridged damp-proof courses are listed and priced separately for Rhondda properties, so you can choose who fixes them. If your Rhondda installation has a guarantee, we check it first; the guarantee route may cover the work.

Wind-driven rain is the first thing the surveyor weighs up. Parts of Mid 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.

For regulations, if cavity wall insulation follows in Rhondda, 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.

Common causes we check

Defective pointing, cracked render and porous bricks letting rain in; leaking gutters and downpipes; fill bridging the cavity where mortar droppings or debris have collected; ground levels above the damp-proof course; and condensation from cooking, drying clothes and too little ventilation.

What is included in Rhondda

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

Guide prices for Rhondda

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.

The steps for a damp investigation in Rhondda:

  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 Rhondda: questions

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.

Do you cold-call in Rhondda?

No. We only come out when you have asked us to. If someone cold-calls offering free insulation, check before you agree to anything.

Is there VAT on a damp investigation in Rhondda?

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.

What will I get from a damp investigation in Rhondda?

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 a damp investigation in Rhondda

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