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Roof ventilation – is it advisable to exceed code minimum

DBars | Posted in GBA Pro Help on

If I well exceed the 1/300 nfva minimum set out in R806.2, can there be any issues with this?

I have 40% at the ridge and 60% at the eaves (split between two eaves of a gable), but my ratio is approx  1/75, roughly 4 times more nfva.

Thanks,

Daniel

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Related Questions

Replies

  1. Expert Member
    MALCOLM TAYLOR | | #1

    Daniel,

    I can't see any downside to more ventilation. Maybe in hot, humid climates?

  2. Expert Member
    BILL WICHERS | | #2

    There is some advantage to having more intake (soffit) than exhaust (ridge) ventilation, since more intake means less issues with a depressurized attic and it's resulting increase in stack effect within the home. The only place I can see venting to pose problems is in areas subject to high fire risk.

    Bill

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