Damp investigation after cavity insulation for St Helens properties
We cover St Helens and the WA10 postcode district, including nearby Prescot, Huyton and Newton-le-Willows. It is around 11 miles east of Liverpool.
Where a St Helens 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 St Helens home is not always the insulation's fault, so the diagnosis comes before any extraction.
Every elevation is judged on its own exposure. Merseyside 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.
As for paperwork, if cavity wall insulation follows in St Helens, 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 St Helens
- Moisture mapping inside
- External defects check
- Borescope at affected areas
- Cause and options in writing
Guide prices for St Helens
| Damp investigation after cavity insulation guide prices | Guide 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 St Helens:
Tell us what is happening
Postcode, property type and what you have noticed.
Price agreed first
We confirm the price before anyone visits.
Visit and checks
Photos and readings at the areas that matter.
Findings in writing
What we found and the options, each priced separately.