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When building a cathedral ceiling with batt insulation filling the space between the roof rafters and the roof ply and drywall, how do we provide for proper ventilation? Is it necessary in this condition? What about the potential for condensation and mold?
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To provide ventilation, there is a styrofoam thing you can put in the rafter space before the batt goes in, it provides an airspace, that works with a roof ridge vent ,and a soffit vent. The insulators will put it in for you.
*Richard,There are ways to largely eliminate the need for roof ventilation. It's been discussed vociferously here dozens of times. Try a search of the archives.Steve
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When building a cathedral ceiling with batt insulation filling the space between the roof rafters and the roof ply and drywall, how do we provide for proper ventilation? Is it necessary in this condition? What about the potential for condensation and mold?