Ventalation: "Is it possible to have too much ventalition near the ..." - Guest User (3/1/2008) | Ventilation | Archive

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Is it possible to have too much ventalition near the ridge and not enough soffit intake venting? I have a 35' run of metal roofing with 2" of space between the insulation and the roof. At the peak of the roof is a small attic with a full ridge vent, two roof vents and a small gabel vent on one side only. On the opposite side from the gable vent, it is starting to mold a bit. I am considering intalling an additional gable vent on the opposite side, but am concerned that this may affect air from drawing up from the soffit vent. any advice?	Guest User 3/1/2008	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/11061/find/
When the soffit and ridge vent are not equal, the airflow will be limited by the lower number. When you add gable and other vents, you start to mess up the airflow. Do you have a way to add complete eave soffit venting, keep the ridge vent, but remove all other vents?	Todd Miller Isaiah Industries, Inc. 3/1/2008	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/11062/find/
Todd, I appreciate yur quick reply. I do have complete soffit venting and the roof vents at 1' below the ridge vent. Because the roof vents are installed in the metal roof, it would difficult to remove them. It wold probably be simpler to plug than to remove them. I could cover the gable, however this is on the side of the attic with no mold. My first thought was to add another on the side with mold, but after reading up on it, thought this may mess up the air flow as you suggest. I should also add, that originally (prior to the mold showing), I had only a ridge vent and added the two roof vents and one gable vent when replacing part of my roof. Another thought...the mold seems to be concentrated in an area above where I have a skylight - could the mold be caused by a slight leak in the vapour barrier near the skylight, even if there is adequqate ventalation? To confirm, you suggest trying to reduce the exit venting (the one gable vent), rather than add another on the opposite side? thanks again for your advice. Ernie	Guest User 3/1/2008	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/11063/find/