Ok - this might be a *really* stupid idea... Given my last problem (spilt caustic soda), I now have a small patch of wetness under the floorboards (about 6in x 6in). It's damp (water), not wet, but I'm mindful of the neighbours below (this is an old 1900 Scottish tenement). There is loose rubble & powdery/dust stuff (about 6in deep - I don't want to dig any further in case I hit the neighbours ceiling!) . Just to ensure it doesn't get any wetter (it's under the shower pipes which I've removed & replaced), and maybe to dry it up, could I put cat litter in there? Mix it up with the rubble? Daft idea? Or is there a proprietary product for this?
Cheers ... Mark