HELP! Mould issues everywhere

Hi all,
Not sure which thread to post this one under but maybe someone will read it and help...
An investment property in outer Sydney has got mould problems occurring on the floor, walls and ceiling.
It's a fibro constructions with wooden floorboards. The floorboards do not sit directly on earth, there is about a 50cm gap between the floor and the ground (dirt) below, so you'd think it would be well ventilated.

It happened last Winter too so while it was vacant I sugar soaped the mould off and repainted everything with two coats of mould resistant paint. I ensured all the ventilation bricks were clear of dust by vacuuming them till I could see daylight through them.

However the mould now also appears on the floorboards, not just the walls, so I'm puzzled by it. Because it's just a fibro external structure damp proofing specialists don't seem to apply (i.e. you can't drill it). I'm suspecting the roof is leaking down the walls perhaps but how would I know for sure?

Any other ideas on causes and solutions?
 
Using a clothes dryer that doesn't vent to the outside?

Oil of cloves (4 TSP in 1 litre of water) sprayed over the affected area will kill the mould. Bleach only makes it invisible but doesn't kill.
 
Using a clothes dryer that doesn't vent to the outside?

Oil of cloves (4 TSP in 1 litre of water) sprayed over the affected area will kill the mould. Bleach only makes it invisible but doesn't kill.



Lizzie is absolutely spot on! You have to kill the mould spores, and oil of clove is one of the only things that do it!

50 mm gap is not good, you need 400mm sub-floor ventilation. Good job of checking the sub floor vents :)
 
Lizzie is absolutely spot on! You have to kill the mould spores, and oil of clove is one of the only things that do it!

50 mm gap is not good, you need 400mm sub-floor ventilation. Good job of checking the sub floor vents :)

It was 50cm (not 50mm) and oil of cloves is a good way to kill the spores.
 
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