insulation and filling in floors

[clementsj]

Hi can anyone advice plse. I wish to take out the existing floorboards and replace with cellotex and concrete in a 1930s bungalow. I would also like to internally insulate the external walls as we have condensation / damp problems.(More of a smell and the occasional green mark) . The walls have been cavity insulated years ago and is not very good due to the capacity in the cavity . Before we start this project how can I ensure that I won't increase the moisture problem when laying the dcm on the floor in relation to the external wall. Eventually want to put in a fitted wardrobe and would be guttered if the problem was made worse. Many thanks