This is the answer, but it got buried in all the commentsThis^^^^^ The thick style toilet paper has been known to clog even plumbing systems that  hasn’t had any prior issues.

Then insulate with minimum R19 and have air gaps above and below the insulation, and finally hang double or even triple layers of thick sheet rock on the ceiling, like this:Even with all that done, your sound barrier is only as good as it's weakest point.

We've all done bone headed things while working our way up in the business (myself included) wasn't trying to offend you but you don't learn from them if someone doesn't tell you why you were wrong and you really need a thick skin to succeed in rental real estate.

I have never used this material before and reviews are from one extreme to the next, either people loved it or hated it so I am assuming it's based on the brand choice which contributes to the difference in quality, durability and thickness.

I’ve tried everything, can’t get thick layer paint off red brick house.

And, depending on how cold winters get where the properties are, you may have to spend extra on thick insulation so that you’re not paying a fortune for electricity by trying to keep a “hot tee cup” (water heater) hot when it’s sitting outdoors in below freezing weather. 

Thick and fluffy!

Your politics aren't worth that cost.While I should have more say in how thick concrete should be, how many lanes to make a road, striping curves speed limits, etc, it is not my job to know the needs of where and why to place a road.

It has brick walls 1ft thick and no bathroom exhaust fans.

It helps to have a short memory and thick skin in real estate sales.