Had an interesting chat with the neighbour yesterday....
N: Did you notice that there are 2 layers of drywall in your bedroom?
MP: Yes....I did. What's up with that? Noticed it when the new 200A service was installed.
N: He called me over to help him lift drywall. Said the room was cold so he was insulating it.
MP: Ok.....
N: He said it doesn't make sense to take down the old drywall and just installed the new drywall atop the old. '2x the insulation as there are 2 layers'.
We laughed...I cried.
FU Kevin.
This same neighbour stripped his house, built an addition on his own, and insulated the walls with 2x4 thickness in one warm room, and 2x6 in the rest of the house. "I can light a match and heat up each room my house is so buttoned up."