I am not a insulation pro, this would be a DIY project on a tight budget and my main goal is to try and make my home more efficient. I live in Brooklyn NY and the winters are brutal and the summers can be equally brutal.
I have an unfinished attic and its also uninsulated. Yes this winter was brutal !!!. It is ventilated with a ridge vent system. I would like to preserve this as my understanding is that its an effective deterrent of ice dams. The house was also built pre-1900 so my rafters are 24"OC.
My thinking is that I can purchase, from Home Depot, foam roof baffles and use that to preserve my ventilation from soffit to ridge, as pain staking as this would be I think its important.
Then I can spray a good layer of spray foam to achieve a air nice seal and then finish the insulation with R-38 craft faced batts.
Giving me around R-49 for the roof which would be code compliant in my area.
Does this sound right? I understand it would not be typical but I cannot survive another winter like what just past.
I do not want to break my roof to insulate from above, the roof is practically new, the previous owners installed it 5 years ago.
Any help would be greatly appreciated. Thanks so much.