What it means
Technicians use a moisture meter at known problem points - seams, windows, roof fittings - during a habitation service. A raised reading doesn't always mean visible damage yet, but it's an early warning worth acting on.
What to do
- Ask exactly where the reading was raised, and whether it's a known problem area for your model.
- Get any perished sealant or seals in that area renewed promptly.
- Book a re-check at the next service to make sure the reading hasn't risen further.
Likely causes
- Perished sealant around a roof fitting or seam
- A failed window or door seal
- Historic damage that hasn't fully dried out
Rough UK cost
Re-sealing is often £150 - £400; structural repair if damp has taken hold can run considerably more.