M hip roof attic, 1200 sq feet, has about 12 feet of ridge; on which I have 10 feet of Shingle Vent II. That's not enough -- the attic hits 135 on sunny days in June (Maryland). And my ductwork is in the attic.
So I am thinking of installing Hip Ridge Vent (say, 8 feet down each of the four 25 feet long hip ridges).
The question is whether this would help. There seems to be disagreement about the effectiveness of hip vent (eg; does it undermine the soffit to ridge stack effect?
Any experience or advice?
BTW: There is a pre-existing roof fan also that I have shut down, per the advice of "never use both". I wonder if I should just give up on the ridge vent and go with a powered solution. Would rather not.
BTW2: I have about 85 sq feet of slotted soffit, spread over front and back soffits -- would more soffit ventilation (say, on the sides of the house) help (or hurt?)
Link to hip ridge vent for those curious: http://www.airvent.com/professional/...hipridge.shtml