Rising Damp

Podger23

I got some rising damp coming up through a concrete floor which has no/damaged damp proofing. The entire area is 40 sqm 30 sqm is concrete flooring the other 10 sqm is wooden which will need to be replaced with concrete. Instead of ripping up the 30 sqm of concrete and laying a whole new floor which would be ideal. Could I lay the new 10 sqm area of concrete minus the screed as in the diagram then use liquid damp proofing overlaid with a rubber damp proofing sheet for the entire area then screed the whole area taking into account that the 10sqm area will have 2 damp proofing layers and that the rubber damp proofing will also go up the walls by a meter or so. Will this work Id appreciate any advice especially if you have used the liquid damp proofing before. Also if this is not an option does anyone have a rough estimate for laying a entire new floor. If I was to do it myself or get a contractor.
Cheers
http://testsite.diy-extra.co.uk/wp-content/uploads/2011/03/img-concrete-floor.gif

BryanF

podger, as i dont know your full situation, have you have a damp specialist look over your home? have you options externally, to alter ground level etc.. presuming this is your preferred solution having aready done the above, have you looked at electric osmosis to connect with the floor DPM? instead of rising the membrane up the walls, and what wall insulation have you considered.

Podger23

Thanks for the reply Bryan I haven't got a damp specialist in yet as I'm still at the early days of addressing the situation. I did how ever have a surveyor in and said that the damp is coming from the ground and an outside wall. Just started to read up on electric osmosis there could be the job for me. Do you know if its expensive?

isaos

Hi Podger, Are you in a totally built area or do you have land around? Drainage seems the first think to do?
In our case, old house sitting on wet lands which are going to be drained thoroughly around the house and further. I am trying to see if we can get rid faster of the dampness coming from these wet grounds without having to knock down the foundations of an old lean-to.

Podger23

Its a terraced house in a built up area. To the rear of the property there is a large slope which actually comes in contact with the rear wall off the house I was also going to damp proof this wall on the outside as I suspect there is water getting in through it.

BryanF

Podger23 wrote: »

Its a terraced house in a built up area. To the rear of the property there is a large slope which actually comes in contact with the rear wall off the house I was also going to damp proof this wall on the outside as I suspect there is water getting in through it.

podger,
you need an on-site perspective, but what you have shown above is an option (id reduce the fill and increase the insulation) also carry membrane up the wall and keep any dry-lining breathable,(insulation,*Vapour barrier taped and sealed & plasterboard) . breathable so as any moisture that finds itself trapped in the dry-lining can dry-out

*thats VB to warm side of insulation as opposed to water proof membrane against ex wall

muffler

Pricing has been left out of the mix so I'll move this to C & P for general discussion.