My master bedroom is above my garage. There is one part of the bedroom that has a cathedral ceiling with knee walls on both sides. There is no attic above this area because the drywall goes up along the ceiling joists. This ceiling is insulated with R19 insulation. The 2 knee walls are formed from the sloping roof in this area.
I also have a fairly narrow front porch that runs the length of the house. The porch has a roof that creates a knee-wall area along the 2 bedrooms at the front of the house. This area attaches to one of the knee wall areas in my bedroom.
There is no ventilation in any of these knee walls areas. There are no soffit vents (or porch ceiling vents in the front porch roof), and there is no way to run any type of venting up to the main attic or to the roof since there is no attic in these areas. There is no way for me to install gable vents, either.
I have insulation along the back of the interior walls in these areas, but I plan to replace it with a higher R-value insulation. Should I insulate the soffit areas (and the front porch roof area), and should I insulate the ceiling joists in these areas, as well?
Any help regarding insulation in these areas would be appreciated. There is no way to run any ventilation, though.
Edit in response to answers:
Yes, I could add soffit vents for intake in these areas, but there is no way to access the attic for out-take venting. Adding roof vents in the areas would look strange and unsightly from the front of the house as these areas run on both sides of my bedroom window which faces the front of the house. Adding a roof vent to the roof area of the front porch would also look very strange and unsightly from the front of the house. The same is true for gable vents. I would have 2 gable vents on the sides of my bedroom window at the front of the house, and, they would only end up being about a foot off of the floor in these storage areas.
So, should I insulate the ceiling joists and soffits in these areas, or should I just insulate the back of the knee wall?