I’m in Southern California. I’m in the process of getting re-roofing estimates for a cool roof with 3″ polyiso and concrete roof tiles. I plan to install rockwool between the rafters in the attic. By default, all of the contractors have added attic dormer vents to their bids. However my understanding is that a cool roof is to create a conditioned space in the attic and to seal any vents. I am going with a cool roof because I have a LOT of air conditioning ducting in the attic.
Before I tell the contractors to delete the dormer vents from their bids, might there be a reason that I would still want attic vents near the ridge, below all of the insulation? Maybe the cool roof would still get hot enough that I would benefit from some air circulation? Or I should completely seal up the attic?
Just trying to think of the reason the contractors spec’d the vents when they know I’m doing a cool roof..
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