# Mould and hidden moisture after water damage

> Water drains away where you cannot see it. Hidden moisture and mould sometimes only surface weeks later.

*Gepubliceerd: 2026-06-08* · *Categorie: uitleg*

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The treacherous thing about water damage is that the greater part of it is hidden from view. Water sinks into floors, creeps into walls and remains behind in the structure.

## Why hidden moisture is dangerous

- Wet insulation and timber structures dry slowly and can begin to rot.
- Moisture in walls attacks plasterwork, paint and wallpaper — often only visible after weeks.
- A damp, poorly ventilated room is a breeding ground for mould.

## Mould and health

Mould is not merely a cosmetic problem; it can cause respiratory complaints. Mould prevention (rapid and thorough drying, ventilating, dehumidifying) is therefore part of any serious claims handling.

## Why this affects the assessment

Because hidden damage flares up later, it is easily missed in a quick first inspection. A proper assessment already takes account, now, of drying, possible mould growth and repairs that only prove necessary later.

> **Tip** — Have a moisture survey carried out after water damage. What feels dry to the touch can still be very wet inside — and that should be counted in.