House fire
#1

Now that the walkout basement has been completely gutted, (due to a fire in sauna-wood burning stove) we can see where the bathtub/shower sits on the upper level and have noticed a cold draft coming from where the drain pipe is. Is this due to poor insulation between the tub and floor or no insulation at all? Also noticed when first purchased the home (Oct 2000) using the bath/shower is like sit/standing on ice. What needs to be done to correct this problem before the remolding starts in the basement? Thank you.
#2
If I understand your situation correctly, this is normal construction practice -- go check out some homes under construction if you want. You don't normally insulate under tubs or between floors. And the tub drain normally has a big hole cut through so the plumber has room to attach the drain and trap. The only reason you plug holes at all between floors is for firestops. But if you want, you can stuff some insulation in there.