We live in a cottage built in the 1950s and has been renovated and added on to over the years. my hub has done alot of work inside the house and out but we have a bedroom that has a musty smell that keeps coming back.we thought we sussed the prob as being poor ventilation under the wooden floor (the rest of the house is concrete floors except for the smelly room and the master bed)so we put in another vent but so far there is a hint of the smell still lingering. its not always noticeable and yet sometimes it would hit you between the eyes. i defo get a whif from the semi solid pine floor at times so is it possible that the smell is now in the flooring. or will it go in time now a second vent under the floor or are we looking at rippping up the floor, and simply concreting it. that would be very messy and a lot of hassle. has anyone any experience of this at all.