At my wit’s end: Flat roof insulation
I’m absolutely frustrated and am hoping there is someone who can help me with my current project…I’m a Paint contractor, but this is my own house. I have a 3-season room in a 1930’s home in Northern NJ(I believe Zone 5)that I’m converting into a full-time heated/ac room. The room is 12′ x 16′. The ceiling is 8′ high, 2″ x 6″(true 6″ not 5.5″) rafters and is a flat roof with no attic. The roof is a black rolled asphalt? I don’t know the technical term I’m assuming it’s asphalt. My issue is how to correctly insulate the Ceiling. I’ve spent what seems like hundreds of hours online and had a few insulation contractors look at the room, and I can’t believe the inconsistencies that exist on this subject. I’m extremely frustrated. I just want to insulate this ceiling without creating any moisture/mold issues. I know for a fact the roof does not have any external insulation. I believe it consists of only the sheathing, a roofing paper type layer and then the rolled asphalt. The roof is only 4 years old so removing it is not an option. The room does not have any venting, nor is it possible to vent….Before anyone suggests closed cell spray foam I’m ruling that out. I have no confidence in the “healthiness” of the product. It might be a great product, but I don’t want it in my house. As I stated earlier I’m completely frustrated, and would sincerely and humbly appreciate anyone’s help on this subject.