How to insulate corners ?


Old 12-19-16, 07:02 PM
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How to insulate corners ?

so I applied extra layer of R30 up on the attic but knowing that I can't cover the eaves to allow for air movement I left just a bit of space in that area.
Now that I use my laser gun thermometer I see that ceiling is holding the temp nicely and so are walls but where the walls and ceiling come together I drop by 4C.

How would you provide additional insulation in the very corners ?
Are there any specific techniques I could use to improve upon it ?

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Old 12-19-16, 07:10 PM
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Styrofoam baffles are generally installed between the rafters to connect the airflow in the soffit with your attic space. Then fiberglass is stuffed between the baffle and the exterior wall top plate to help prevent heat loss.

3 stud corners and partitions in exterior walls must be stuffed with insulation as the home is being built. (Before sheathing is applied) If it got missed and they are empty, you can drill lots of 3/8" holes through the corner of the framing into that void and inject the corner with expanding foam. A foam spray gun system works well for that sort of work.
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