Mould after a leak or flood: the first 48 hours

The clock starts immediately

Water damage and mould go hand in hand. Because mould can begin within 24–48 hours, what you do in the first two days largely decides whether you avoid a mould problem or inherit one. Speed matters more than anything else here.

First 48 hours: the checklist

Stop the source — fix or isolate the leak, shut off water if needed. Remove standing water — mop, pump or extract. Dry aggressively — open windows, run fans and a dehumidifier, lift carpets. Remove soaked porous items — saturated carpet, underlay, plasterboard and insulation often can't be saved and hold moisture that feeds mould. Ventilate continuously.

What to watch after drying

Even after the surface looks dry, moisture can linger inside walls and under floors. Watch for a musty smell, staining, or bubbling paint in the following weeks — signs mould has taken hold out of sight.

When to call for help

If materials stayed wet beyond 48 hours, the affected area is large, or you can't fully dry it, assume mould is developing. An mould inspection uses a moisture meter to find damp hiding in the structure, and professional mould removal deals with anything contaminated before it spreads.

Had water damage? Don't wait for mould to appear — book a €75 inspection or call +357 96 738151.