For asphalt shingles, a cold roof works best.
[caption id="attachment_2769" align="alignnone" width="150"] Vented SIP roof configuration[/caption]
Create a cold roof by applying a layer of sheathing over 1x3 furring 16 in. on center. Venting at the ridge and eave allows air to move freely between the two layers of sheathing. This style of roof helps to prevent moisture buildup.
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