damp/ water rising up through a concrete floor.

[mart]

Hi, thanks to everyone who've answered my questions before. Here's yet another one about my nuisance floor. Can water or water vapour come up through a concrete floor and go through a polysteryne insulation block to ruin a plywood floor above it. My housing surveyor who's looked at it has said its unlikely but a damp proof guy has said that this is a likley occurrence and its because the damp proof membrane on the concrete floor has "failed".
If he is right what can be done to put the problem right, before i put down new plywood flooring etc.

 

[masona]

I need to understand your floor layout first.Are you saying you got concrete floating floor type or hardcore on the base then sand to protect the DPC membrane and concrete with floorscreed on top with your plywood on top? What is your plywood sitting on ? Normally the DPC membrane get damaged by the end of the shovel cutting into it when concrete are pour in which should be done with great care or the end of the membrane sheets are not overlapping enough.

 

[mart]

its a concrete floor, then above that theres plastic sheeting across it (is that a protective sheeting?, above that its polystyrene insulation tiles en on top of that its plywood flooring. i dont know whats directly under the concrete floor though, should that be where the membrane should be, its just that one guy said that could be damaged, apologies for sounding so vague, this is all new to me.

 

[masona]

Is this what you think you might have ? www.invisibleheating.co.uk/floor_types.htm if you're not sure your local planning council should be able to help you as they keep drawing plan of your house layout and you can buy a duplicate copy.If it's your membrane damaged there is no quick solution to this than breaking down to it,but don't do this yet as it could be your central heating or water main etc.Try and find out how your floor layout is first,then it will make your job a lot easier & then hopefully I can tell you what to do.