I recently had two new trane RTUs installed. I went with curbs and down draft install instead of the original design of stands with side draft attached to a 90 elbow.
I now have a constant vibration that i can hear through the entire house. 90 feet away in the laundry room i can still hear the unit over the bedrooms.
The contractor has been back to look at it an has no solution. I feel the new curb is touching the existing metal from the original rooftop flashing and making the sound??
Does anyone have advise or personal experience with curbs vs stands?
Should I have felt or some membrane between the curb and roof?
Should i have sound deadening material in the partition of the curb that is unused.
I do not have much faith in the contractor, They had all of the right answers before the install and now only point the finger to someone or something else.
All help would be greatly appreciated.