Insulating exterior wall and vapor barrier question?

b_corwin

I have the drywall torn out of my bathroom and am using the opportunity to re insulate and want to make sure I do this right.

I have 2x4 walls, and was going to get the highest r value paper faced (unfaced?) insulation I can find and place it in the stud bays paper facing in and stapled to the studs. I was then going to lay plastic vapor barrier over the inside walls before putting up the drywall.

is my plan sound?

Thanks
b

Bombcru

if your going to put in plastic then you don't need faced. facing is a vapor barrier. make sure the plastic is 6mil
try to tie the plastic in with the other walls and floor if possible, you will notice a huge difference with it up as well, I gained a 10 degree steady temp from doing my bathroom walls.

gregzoll

R-15 (r-19 compressed goes down to r-15) is the highest value that you can use in 2x4 studded walls. Now, the best would be to use Spray Foam, which not only insulates, but creates a vapor barrier.