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Bangor, County Down · County Down

Damp investigation after cavity insulation in Bangor, County Down

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. We cover Bangor and the wider BT20 postcode district, and the price is confirmed before anyone visits.

Book a damp investigation in Bangor, County Down

Covering Bangor and the BT20 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.

Damp investigation after cavity insulation for Bangor, County Down properties

If your property is in Bangor or the BT20 district or nearby Newtownards and Downpatrick, it is within our County Down coverage. Bangor is one of the main towns we cover in County Down.

We never cold-call in Bangor or anywhere else, and we do not work with doorstep claims companies. If your Bangor installation has a guarantee, we check it first; the guarantee route may cover the work.

Before any material is chosen, exposure is checked. Parts of County Down 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 Bangor, inserting cavity wall insulation needs a building control application to the council before work starts.

Rules in Northern Ireland

Inserting cavity wall insulation needs a building control application to the council before work starts if insulation work follows.

Sources: Building Control NI: frequently asked questions; Belfast City Council: what are the building regulations.

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 Bangor, County Down

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

Guide prices for Bangor, County Down

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 Bangor:

  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 Bangor, County Down: questions

How much does a damp investigation cost in Bangor?

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

How soon can you visit in Bangor?

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.

What will I get from a damp investigation in Bangor?

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.

Do you work on rented homes in Bangor?

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

Nearby towns

Book a damp investigation in Bangor, County Down

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