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Hampshire · England

Existing insulation and guarantee check in Hampshire

An existing insulation check tells you whether a cavity is filled, what with, whether it looks dry and intact, and how to trace any guarantee. Our Hampshire coverage includes Southampton, Portsmouth, Basingstoke and the towns around them.

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Old cavity insulation drill holes, filled with mortar, spaced across a brick wall

Book an insulation check in Hampshire

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.

Existing insulation and guarantee check across Hampshire

We cover 18 towns in Hampshire, including Southampton, Portsmouth, Basingstoke, Gosport, Waterlooville and more.

Before any material is chosen, exposure is checked. Hampshire has a mix of moderate and more exposed sites. Hilltop, coastal and west-facing walls take the brunt of wind-driven rain, so the survey records exposure for each elevation before a material is chosen.

Every inspection point in Hampshire is photographed and logged, so you have a record to show a buyer, lender or contractor. Buyers and sellers in Hampshire often book this check when a survey report or EPC raises questions about the walls.

Building Regulations in England

Filling an existing cavity wall is notifiable building work in England. Either a building notice goes to building control before the work, or the installer self-certifies it through a government-approved competent person scheme such as CIGA's CWISC scheme. The insulation used must also be suitable for the wall it goes into, which is why the survey checks construction, condition and exposure first.

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

Tracing a guarantee

Many cavity fills carry a 25-year guarantee from the Cavity Insulation Guarantee Agency (CIGA). CIGA can confirm whether a property is covered and can issue a duplicate guarantee for a fee; at the time of writing that fee is £60 including VAT, and proof of ownership is required.

What is included

  • Borescope checks
  • Visual check of walls and patched holes
  • Damp signs inside and out
  • Guidance on tracing a guarantee
  • Short written report

Existing insulation and guarantee check prices in Hampshire

Existing insulation and guarantee check guide prices
Existing insulation and guarantee check guide pricesGuide price
Existing insulation and guarantee check£145–£245

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 an insulation and guarantee check in Hampshire:

  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.

Existing insulation and guarantee check in Hampshire: questions

Do you cover all of Hampshire?

Yes. We cover 18 towns across Hampshire, including Southampton, Portsmouth, Basingstoke and Gosport, and the villages around them. Island and remote addresses are surveyed by arrangement.

How much does an insulation and guarantee check cost in Hampshire?

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

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.

What will I get from an insulation and guarantee check in Hampshire?

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.

Existing insulation and guarantee check in nearby areas

Book an insulation check in Hampshire

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

Request a price