Fiber glass installation.......???

Question

I asked this question a few days ago. I got a lot of people saying both...so I'm not sure which is right yet..

Someone in my family had installation put under his house. It's the type of installation that's pink fiber glass on one side and paper on the other. The people who did it put the paper side up, towards the floor and pink side down. So when you look under the house you can see the pink. Some family members say it's done right, and some say it's done wrong (upside down) WHICH IS THE RIGHT WAY!!!!! If you have any websites that can back it up post a link please, if not just tell me which way you think is right! THANK YOU!!!!

Answer 1

Paper side toward the heated area.

Answer 2

The paper or foil faced backing on insulation is the vapor barrier.  This barrier ALWAYS goes to the heated side.  The reason for this is, if it were the other way around, you would be trapping moisture between the barrier and the room trying to being insulated.