cape cod sloped ceiling
I am in the process of improving insulation / venting of my cape cod. I was wondering if anyone knows from their experiences what would be the minimum R-value needed in the sloped ceiling section above the knee wall attic to prevent ice dams?
Did anyone have any success with R20, R25 or R30? There will be a properly sealed air channel between insulation and roof sheathing. My climate zone is 5 and this section of house is south facing. Thank you very much.
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