Ventilation Louvres

Are gable vents enough intake air for a ridge vent?

My turbine fans were replaced with a vented ridge on the new roof, but my house has no eaves for soffit vents. Do the gable vents provide enough air coming into the attic? Will making them bigger help? The only place I could add a soffit vent would be where the roof covers the porch. The estimator recommended replacing them both for cosmetic reasons and because he thought that air was getting in but not getting out having only 2 turbines. It just seems like I have the opposite situation now where air can get out, but not enough fresh air can get in. As simple as adding a soffit vent at the porch will be, what can it hurt? I wouldn't necessarily say that the turbine/gable system was 'working', a lot of my shingle damage was made worse by the fact that my shingles were warped and brittle from being cooked by my hot attic below. As far as cheap, it would have been cheaper to replace 2 turbines than to vent the ridge.

Public Comments

1. Should be fine. Making them bigger will help some what. Why did they remove the turbines when they redid the roof?
2. The turbines were obviously replaced with ridge vent to improve the looks of the house. Plus turbines have moving parts that over time sieze up and stop working. I suggest adding some ventilation where the roof covers the porch. Be careful in increasing size of gable vents as that can lead to creating a suction like situation where during a driving rain of wind blown snow, the ridge vent will become the suction point and the gable vent will be the exit point. This could bring rain/snow in through the ridge vent.
3. most ridge vent manufacturers require installers to bleck gable vents if installing a continuous ridge vent. strategically placed soffit vents are key to a properly functioning ridge vent. sounds to me like the builder had much more wisdom than the current residents and noone expects any wisdom out of a temporary roofing contractor but the turbines and gable vents you had were a much better system, should not have changed what worked. say what you want about moving parts and what not but you replaced a fully functioning system with a strip of plastic! i'm sorry you believe the guys installing the cheapest, most temporary, toxic and most irresponsible form of roofing known to man know what they're talking about.