i recently had an extention to my house with a cement floor - floor took a few days to dry out , ever since i have had a 'sort of' mould appearing on my wooden shelves/furnature inother rooms - it looks like a fine cement dust - which i wipe away with a weak bleach solution - but appears again 2 weeks later - mainly on my wooden furnatur/shelves, no where else. what can i use on it? getting fed up of wiping it every 2 weeks
any hints appreciated

Hello!
You may have a humidity problem? If you get rid of any dampness then there shouldn't be any way for the mould to grow, but I am anything but an expert.
Hope that helps. Also, the mould may lead to bugs. I think some bugs eat the mould. Possibly like the very annoying little white ones I had!!

Are you sure it is not just cement dust. This can keep appearing for weeks afterwards.

I too thought this, didn't want to say as thought it was Toooooooooooooooo obvious.Should the cement not be sealed/covered, you can buy special floorpaint we used it to seal our garage floor,no dust.

floor was dry 3 months ago and coverd with laminate - so cant see how the dust would appear from there- not sure wether there is an 'anti fungal' wash fo ufrnature

Are you sure it's not just ordinary common-or-garden dust????

When we had our bathroom plastered, we got plaster dust in there for months even after the walls had been sealed and tiled! I don't know why, but it just kept making dust. Maybe it is the same for your cement floor.