My house was built around 2000, and seems to have plastic sheeting behind the drywall (I'm unsure what thickness plastic was used and what type of plastic; is there some sort of standard?)
My house just recently flooded, and they removed the bottom 2 feet of drywall + insulation + plastic sheeting (which seems strange, given that their concern was that humidity would get to the insulation, which is what the plastic sheeting is meant to prevent).
What is the correct approach to get the bottom 2 feet of drywall re-installed? Should plastic sheeting be used for the bottom 2 feet? Is it OK that there will be a gap between the old plastic sheeting and the new one?
Additionally, the walls in our basement were completely ripped out, so I'm not sure what was there; should plastic sheeting be used behind the dryall in the basement?
(I am in Colorado; we have frigid cold, dry winters)