Basement or ground floor damp proofing

[smaj]

Hi

We purchased a edwardian house which has a cellar approx 1.5m height.

There seems to be damp in the ground floor above the cellar in odd places.

The house has been locked for approx 8 years and maybe this is the cause of the damp etc.

I am starting to renovate and am not sure if I need to do the damp proofing ie tanking.

If I do, do I need to tank the top part of the cellar below the skirting boards or from skirting boards up.

Please help

 

[flameport]

The house has been locked for approx 8 years

Any property sealed up and unused for 8 years will have damp.
It's due to lack of ventilation and no heating.

damp proofing ie tanking

Not required.

Ensure the cellar has plenty of ventilation to the outside.
Fully insulate the cellar ceiling/ground floor.
Never go in the cellar again.