I am insulating a cape built in 1943. When originally built ,I do not think the second floor was finished. So the exterior walls and roof rafters were insulated. in the mid 80's the second floor was finished(I being kind). Some or the rafter insulation was loosened from the rafters and layed on the new ceiling of the second floor. Its old wool insulation which has disintegrated. I removed all the roof rafter insulation I can get to. But there is a 4ft area behind the angled portion of the second floor ceiling where the old insulation remains. I put R13 on all the vertical knee walls and plan to blow in R49 above the rooms as well as behind the knee walls. I have 2 questions . 1- Should I install provent attic vents to keep air flowing from behind the knee wall area to the upper ceiling. There is wool insulation there, but very thin. there are no soffet vents. 2- Is there anything else I should do, without removing the sheetrock on the angled ceiling. There are 2 14x16 vents on either side of the attic. and i plan on adding a static roof vent in the roof area behind the knee wall if necessary. I appreciate any advice you can give..