with 2 by 10 rafters, you can only fit about r28 in there. that allows for a rafter shoot/vent to go in the 1 or 2 inches of space that is left all the way to the roof vent space. and did the roofers also put roofing felt under your (shingled?) roof. this always prevent any future leaks, plus any ice getting up under the shingles from dripping down into the roof sheating and down into the attic/vent space.
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