Existing insulation and guarantee check across Dorset
We cover 4 towns in Dorset: Bournemouth, Poole, Weymouth and Christchurch.
Local weather affects which walls can be filled. Dorset 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.
The written result for your Dorset property is plain English: what we found, what it means and what, if anything, to do next. A survey in Dorset gives you facts before anyone drills: what the wall is, what is in the cavity and whether it is sound.
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.
How to tell if a house already has cavity insulation
Look for a regular pattern of small patched holes in the mortar joints, often about a metre apart. Check the EPC, which may say 'filled cavity'. Ask the seller for a guarantee. The reliable answer is a borescope check, because patched holes can be from a fill that was later removed and EPCs are sometimes wrong.
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 Dorset
| Existing insulation and guarantee check guide prices | Guide 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 Dorset:
Get in touch
Online, by phone or WhatsApp.
Your price
Confirmed in writing before you book.
The visit
Carried out at an agreed time, with photos of what we find.
Your report
Plain English, with any follow-on work quoted separately.