my wife was recently cleaning the lounge when she noticed a lot of dead wood lice on the carpet around the front window area-----I lifted the carpet to do the neccessary with a spray and I found that the floorboards felt damp(ish), we get a lot of condensation in the room so I am putting it down to that for now, I lifted some floorboards, in the hall and there dosen't seem to be any airflow under the house ---should there be?----