I have a 4 unit multi-family with apartments on the first and 2nd floor........
Extremely loud and high pitched creaks in the downstairs apartment when the upstairs tenant walks.
The floorboards have been screwed to the joists and suprisingly the sound is coming from the 5/8 inch drywall ceiling. Slight flexing in the joists (2x8) when upstairs tenant walks creates cracking and popping sounds all over the ceiling, easily waking downstairs tenant up at night.
Tried screwing the drywall ceiling to the strapping, which helps but not enough. Any thoughts on a solution???? May tear down the ceiling and try a different type of drywall. Are there Sheetrock drywalls anyone would recommend?