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Old 11-15-2009, 09:21 PM   #1
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Another Insulation Question...confused?


I am about to insulate my attic remodel. My plan was to vent and insulate the rafters (R-38C) from the soffit to roof and the gable ends.

Should the knee walls and ceiling (attic remodel) also be insulated?

I have read many things, just trying to getting a feel for what people think?
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Old 11-15-2009, 09:36 PM   #2
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Another Insulation Question...confused?


I insulated the knee wall on my 2nd floor, old rafters have existing R25
In my additon I'll have R38/R38C in the rafters & R19 along the lower ceiling
The more insulation the better IMO

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Old 11-16-2009, 12:12 AM   #3
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Another Insulation Question...confused?


Seal all air leaks before insulating:


Notice the access door and foam blocks under the knee wall to stop air movement under floor: http://www.simplesavings.coop/simple...ee%20walls.pdf Make sure you have ventilation from soffit to ridge.

Be safe, Gary
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Old 11-16-2009, 07:16 AM   #4
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Another Insulation Question...confused?


Thank you for your responses.

So insulating the rafters from soffit to roof with R-38C and what should be used for the knee walls and ceiling? I live in Massachusetts.

This will be inspected by the builing inspector also.
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Old 11-16-2009, 07:41 AM   #5
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Another Insulation Question...confused?


I insulated one part of my knee wall with R19
Another part will be insulated with R13 or R15

My knee wall storage is still warm, but the wall insulation will help keep the heat in the main area
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Old 11-16-2009, 11:42 AM   #6
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Another Insulation Question...confused?


Depends on each location: http://www.ornl.gov/~roofs/Zip/ZipHome.html

http://www.ornl.gov/sci/roofs+walls/...on/ins_06.html
Your County may have a web site just for this information.
Be safe, Gary

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