Insulating finished attic kneewall space
I have snooped around these forums for a bit now and have gathered enough knowledge that I have started tackling insulating my kneewall space. My house is 1907 colonial revival (I think) and it has several hips and dormers making the job difficult. I am located in St. Louis, MO.
I have opted to insulate the knee wall, slope, and top attic, instead of the roof as it seems a bit more feasible.
Currently, I am air sealing the floor joists with rigid foam and spray foam. I am also putting in batts in the kneewall along with foil faced rigid foam. For the top attic, I will blow in insulation and also down into the slope. I plan to put baffles in the slopes and then seal them to keep airflow but also get some R-value. Last I’ll blow in insulation to the attic portion behind the knee wall the best I can. Here are some questions I have and would truly appreciate any advice. Thanks!
1. If I use Rockwool in the wall will the foil-faced foam provide the vapor barrier or do I need a separate one?
2. Will putting rigid plastic baffles up the slope be enough airflow to the top attic?
3. For dormers or hips where I have next to no access, should I just blow in insulation and hope for the best?
4. Should I add some vents down in the lower portion of the attic?