Recently had an energy audit done. I was told that it is no longer being recommended to vent a roof. I was told that if the insulation was installed correctly there is no need for ventilation. I was told that the recommended method for insulation would be a dense pack cellulose into the rafters. They also said that Fiberglass bats would also work. The critical part was that I had to ensure that there are no air pockets left between the decking and the insulation material. When I was told this they said the idea of not needing venting is fairly new and anyone I talk to would say it is crazy. I am hoping to get some good feedback on anyone who is hearing this in the field. I was shocked but it is coming from someone who is the best in the field and well respected. Please have an open mind when replying as things in all industries do change.
I would like to add that it is a late 20s colonial. I am having cellulose blown into the empty walls and tightening up the foundation and attic areas. It is considered a 2 1/2 story with stairs to the attic space that I plan to finish and use, minus the storage on the edges.