Hi all. Not sure where this post would fit best, so I placed it in framing and foundation. In the province I live in Canada, our provincial hydro company offers a rebate for increasing your insulation in your house (I'm am focusing on attic first) up to R50. I have determined that my existing is abut R20. What recommendations would you have for topping it up to R50 - Bat Insulation, blown, etc?? I am going to do the work myself if that helps. Thanks!