If the dampness is present within the ground floor and first floor it will probably not be due to rising dampness. The most likely cause will be condensation. This will usually present itself as mould to walls and steamed up windows. Condensation can be controlled be implementing a few fairly simple measures.
1. Ventilate water making areas: the production of humidity is usually confined to kitchen and bathroom. I would recommend humidity controlled fans. Best are from Nuaire.
2. you could consider positive pressure ventilation. These appliances have shown remarkable success in the control of condensation.
3. Ensure that heating is set at the correct level. It is better to set heating at a low level in the wintertime at constant rather than off and on which can cause chilling of a property thus raising the relative humidity at the cold times.
Structural Waterproofing surveyor
Damp in houses is mostly bad maintenance.
Guttering not working
holes in bricks
large garden bushes against the wall will hold damp in this area
trees touching the walls
garden soil against the wall higher than the damp course
common sense is the thing with damp look around the areas with a problem and 9 out of 10 times you will find the course