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Ruislip · Greater London

Damp investigation after cavity insulation in Ruislip

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 Ruislip and the wider HA4 postcode district, and the price is confirmed before anyone visits.

Book a damp investigation in Ruislip

Covering Ruislip and the HA4 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 Ruislip properties

Ruislip is among the towns we cover in Greater London, alongside Northolt, Uxbridge and Harrow. It is around 14 miles west of London.

Where a Ruislip 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. We never cold-call in Ruislip or anywhere else, and we do not work with doorstep claims companies.

Wind-driven rain is the first thing the surveyor weighs up. Much of Greater London sits in the more sheltered driving-rain zones of the UK, which widens the choice of fill. Exposed elevations, coastal sites and high ground still get checked wall by wall.

As for paperwork, if cavity wall insulation follows in Ruislip, filling a cavity is notifiable building work and needs a building notice or competent-person self-certification.

Rules in England

Filling a cavity is notifiable building work and needs a building notice or competent-person self-certification if insulation work follows.

Sources: Planning Portal: cavity wall insulation and building regulations; CIGA: CWISC competent person scheme.

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 in Ruislip

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

Guide prices for Ruislip

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.

How it works in Ruislip:

  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.

Damp investigation after cavity insulation in Ruislip: questions

Do you cold-call in Ruislip?

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

How much does a damp investigation cost in Ruislip?

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

Do you cover Ruislip?

Yes. Ruislip and the HA4 postcode district are within our Greater London coverage, along with nearby Northolt and Uxbridge.

Do you work on rented homes in Ruislip?

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

Nearby towns

Book a damp investigation in Ruislip

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