Stranger Things Soundproof Houses

Watching Stranger Things with Pam and one thing I have noticed is that apparently everyone else’s house is easier to climb into and much more soundproof than any that I have ever lived in. These people can have very loud conversations in their basement and nobody on the floor above them can hear a single word. Also apparently anybody can climb onto the roof of a house and sneak into a bedroom without anyone noticing. Apparently these people have some very well insulated houses. I’m not sure who built them but movie houses are either high quality work or everyone in Hollywood is deaf.