Gable and ridge vents literature
Should I install a ridge vent with gable vents and without any soffit or other eave venting? The attic space is currently vented with a gable vent on each end (no fans or other active). The house is a gambrel-style / barn-style / dutch colonial so there is also unvented roofing shingles around the 2nd floor. The two areas (steep shingles around 2nd floor and gradual above attic) are not connected, save any framing gaps between the two.
I am looking to replace my roof and the contractors I received quotes from all want to install a ridge vent, but no soffits (since there is no traditional place to install). One did specify the ridge vent would be an external baffle unit, but the others were vague as to what would be installed.
I have seen some of the options for sheathing-mounted venting options, but have not found any contractors familiar with the product.
Is there any literature on the gable-ridge venting combination? I have seen lots of articles on how venting should be, but nothing on if this combination is an improvement/detriment compared to just the gable vents?
The house is located in Zone 4a, just north of Washington DC and south of Baltimore.
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