It is more than reasonable to ask her to place a heavy duty mat under her treadmill - I say this as both an upstairs and downstairs neighbour since I'm living like the filling in a sandwich. I also exercise in my apartment, although not on a treadmill as that seems a bit over the top imposing for the neighbours.
Neighbor's Treadmill Noise: Help ! Good Questions
|12/11/12 11:13 AM|