Lower Unit Complains About Noise from Upper Unit

[Mark Tully]

My tenant in a lower unit is complaining that she hears the walking about, moving furniture, cracking ceiling noises, etc.  Is there anything I can do to help fix this problem?  She is a new tenant and other than this complaint has no other issues with the unit.  Perhaps she is too sensitive to the noise, I don't know.

It was suggested that I insulate between the upper floor and lower ceiling, which I am willing to do.  However, I have been told that this is better done when the lower unit is vacant.  Is this true?  Any other ideas to remedy the problem?

I am a forum newbie so any ideas would be appreciated.