If the damp is entering the house from the side wall, I hear there is a solution of fixing a drainage pipe around the outside wall which collects the damp and spits it out away from the house.
But if the damp is raising from the middle sections, this kind of works too but it means replacing the whole of the ground level of the house.
hope this helps, I will be happy to guide you in the right direction reagarding this.
Turgay