Originally Posted By: rcloyd This post was automatically imported from our archived forum.
SWalter,
A continuous ridge vent can be superior to standard (box) roof vents as it allows a continuous (long) opening at the ridge of the roof. This facilitates air flow into the soffit vents and out of the ridge vent when wind blows over the ridge. I would recommend adding soffit vents (as you mentioned you did not have enough) and installing a continuous ridge vent.
Originally Posted By: lewens This post was automatically imported from our archived forum.
I’m going to jump in on the other side of the equation and say personally I would never install a ridge vent on a building. I am a firm believer in standard box vets mounted as high as possible on the roof to the ratio of 1sq ft to 150sq ft of roof. In addition you can never have too much soffit venting. The ideal is to have the interior of the attic space the same temp. as the outside, a very hard thing to accomplish on a very hot day.
Originally Posted By: phinsperger This post was automatically imported from our archived forum.
A minimum of 1sq ft to 300 sq ft of the insulated ceiling area. More is better of course. The 1/150 ratio is for low sloped roofs.
The 1sq ft to 300sq ft should be split between lower and upper venting. So approx 1/2sq ft to 300sq ft of soft vent and 1/2sq ft to 300sq ft for upper venting.
I personally like ridge venting. Although there are some ridge vents that just aren't designed very well and can not only allow rain/snow to enter but can also create a negative preasure as wind blows over top of the peak. I have found the Cobra system to perform well.