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Grantham · Lincolnshire

Damp investigation after cavity insulation in Grantham

For properties in Grantham, a damp investigation starts with a clear price and ends with a written record of what was found and done. 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.

Book a damp investigation in Grantham

Covering Grantham and the NG31 district. Tell us about the property. We confirm the price before you book.

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Damp investigation after cavity insulation for Grantham properties

Grantham sits in Lincolnshire, about 22 miles south of Lincoln. We work across the NG31 district, including nearby Stamford, Spalding and Lincoln.

Damp in an insulated Grantham home is not always the insulation's fault, so the diagnosis comes before any extraction. If your Grantham 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. Much of Lincolnshire 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.

On the rules side, if cavity wall insulation follows in Grantham, 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 Grantham

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

Guide prices for Grantham

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 Grantham:

  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 Grantham: questions

Do you cold-call in Grantham?

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 Grantham?

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

What will I get from a damp investigation in Grantham?

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.

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.

Nearby towns

Book a damp investigation in Grantham

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