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Brecon · Powys

Damp investigation after cavity insulation in Brecon

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

Book a damp investigation in Brecon

Covering Brecon and the LD3 district. Tell us about the property. We confirm the price before you book.

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Damp investigation after cavity insulation for Brecon properties

If your property is in Brecon or the LD3 district or nearby Llandrindod Wells and Newtown, it is within our Powys coverage. It is roughly 39 miles south of Newtown.

If your Brecon installation has a guarantee, we check it first; the guarantee route may cover the work. Where a Brecon 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.

Local weather affects which walls can be filled. Parts of Powys 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.

As for paperwork, if cavity wall insulation follows in Brecon, 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 Brecon

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

Guide prices for Brecon

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 Brecon:

  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 Brecon: questions

How much does a damp investigation cost in Brecon?

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

Do you cover Brecon?

Yes. Brecon and the LD3 postcode district are within our Powys coverage, along with nearby Llandrindod Wells and Newtown.

What will I get from a damp investigation in Brecon?

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.

Is there VAT on a damp investigation in Brecon?

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.

Nearby towns

Book a damp investigation in Brecon

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