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Yeovil · Somerset

Damp investigation after cavity insulation in Yeovil

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

Book a damp investigation in Yeovil

Covering Yeovil and the BA20 district. Tell us about the property. We confirm the price before you book.

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Damp investigation after cavity insulation for Yeovil properties

Yeovil is among the towns we cover in Somerset, alongside Bridgwater, Taunton and Frome. It is about 21 miles east of Taunton.

Where a Yeovil 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. Damp in an insulated Yeovil home is not always the insulation's fault, so the diagnosis comes before any extraction.

Wind-driven rain is the first thing the surveyor weighs up. Somerset 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.

On the rules side, if cavity wall insulation follows in Yeovil, 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.

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 Yeovil

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

Guide prices for Yeovil

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 Yeovil:

  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 Yeovil: questions

Is there VAT on a damp investigation in Yeovil?

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.

What will I get from a damp investigation in Yeovil?

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.

How much does a damp investigation cost in Yeovil?

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

How soon can you visit in Yeovil?

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.

Nearby towns

Book a damp investigation in Yeovil

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