I live in cold, six-month winter, upstate New York, and am looking to add some insulation to my attic. There are two rooms which are finished, but there is unfinished space behind the kneewalls. I would like to add insulation back there (I have already added some fiberglass at the space where the floor, lower wall and roofline meet). There is a wood-paneled floor back there, not exposed joists. I don't know whether I should go with blown-in cellulose under the flooring(which would leave me the storage space, but would cost more $$) or lay fiberglass on top of the floor (this would be preferred because I could do it myself).
If I go fiberglass, is R-49 appropriate, should it be paper backed and does the paper go on the floor or on top? I also assume I would not want to put a vapor barrier in, right, since that might create a mildew situation?
I'd appreciate some input(especially from Canuk).