My 21 year old cedar sided one story ranch creaks and groans at night. I think this is related to the temperature dropping outside because this does not occur in June and July when there is little difference between night and day time temperatures. One person said that it might be the release of moisture built up in the attic and that I should check to see if there were enough vents in the soffit. I did and there is only one soffit vent for the whole house. Could this be the source of the problem or is something else doing it?