Help, it is only in one room. when it is nice outside and we open the doors and or windows, it starts to have a certain smell to it. we have pulled up the carpet, replaced the floor boards etc and still cannot determine the cause of the smell. the house is only 2 years old and we have had the smell since day 1. the living area is upstairs and downstairs is garage and 2 additional rooms. it is only in this one room, there is a powder bath next door. our builder is willing to help but does not know what to do. any ideas? i am concerned about the health hazards for by baby of what i can smell.