Air sealed all air leaks with spray foam insulation. Then we added 19 inches of cellulose insulaton giving attic a R-value of 60
We installed a catwalk and insulated with 4" foam insulation. This allows access to the other end of the attic without compromising the R-Value in this area. The end result was more comfortable rooms and lower utility bills.
We air sealed and insulated this attic in Baden, PA. The catwalk has 4" of SilverGlo insulation under the plywood and the rest of the attic is insulated to R-60 with cellulose insulation.