Rigid insulation on a pitched solid wood roof deck
Have a cathedral ceilinged residence with 4×6 tong & groove hemlock exposed to the interior supported by gluam arches at 15′ on center. Want to reshingle this uninsulated roof with thick nailable rigid insulation on top of the woo deck.
Is there a guide for determining insulation thickness and selecting a vented or non-vented system? Have gotten very mixed answers from architects and engineers, and the manufactures of the systems are of little help. Since non-vented is the leastexpensive, it could offer a better payback. Am in 5,500 degree day climate in New York. – Thanks, Rob
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