I have a Cape Cod from 1930, I'm sure this is not a shocker but it's underinsulated...... Side attic Kneewall has no insulation in it which is on the list. Side Attic floor / living room ceiling has no insulation in it which is on the list. Rafters are insulated / OOOLLLLDDD insulation which is falling apart which is on the list. However... the part that puzzles me is what I've highlighted in the picture, there's about 3 feet or so of area where the sloped ceiling in the bedrooms is attached directly to the 2x6 rafters. I can slide the ventilation baffles into that space, but since they are 2x6's that's only going to leave around 4" for insulation. What have you guys done to tackle this problem? Do you attach an R13 bat to the baffle and yank it through? Use rigid foam board instead? I know it's usually used for outside projects, but I'm running out of ideas.