Mainly noise prevention. We require a specific underlay for noise insulation, and some homeowners did not know this and moved ahead with a flooring installation that had to be stopped in process. One homeowner resurfaced their outdoor balcony floor without approval and was forced to remove it as it was determined that the alteration could impact potential water intrusion into the building structure.
makes sense. We worked on a condo remodel a couple years ago. It probably took 6-8 months. Down to the studs. And jack hammer out the tile in the showers. The hours were strict and every effort was made to accomodate the neighbors (up/down & sideways) But I'm sure it took a toll