General Suburban Updates and Rumours

[tomh009]

Just a single data point (well, 2 data points), but the townhouses I have lived in had common walls made of a single layer of concrete blocks with drywall glued directly on. Excellent sound transmission (which is bad, obviously), although probably OK for fire isolation.

A concrete block wall with drywall mounted on Z-bars is actually pretty good (STC rating of 52). A common highrise condo setup is drywall on metal studs, which is only STC 39.

Metal is the worst for sound transmission.

Plenty of reading material available for those interested.
https://en.wikipedia.org/wiki/Sound_transmission_class
https://www.aisc.org/globalassets/modern...ce_web.pdf