I was speaking with a home owner, a competitor roofer decided too bid ridge vent. On this person's house a ridge vent would normally be a great idea, however he has zero overhang, so no intake ventilation. As you may know ridge vent only works with equal or greater intake ventilation.
I spent half an hour trying to explain to the home owner why that the ridge vent is usually a better method of ventilation, however not in his case because he has no intake.
What do you guys do for ventilation when bidding on new roofs but there is no intake? Typically I just bid mushroom vents as the exhaust. Actually I try to upsell the creation of some intake but if it's not in the budget I am left with only one option, mushroom/breather vents.