What is the optimal ventilation for a hip roof we have a hip roof in need of replacement and there is discrepancy in the ventilation suggestions.
How to ventilate a hip roof.
So we would need at least six metal vents in addition to the lower soffit ventilation to meet minimum ventilation requirements.
One contractor is recommending 2 attic fans and a ridge vent one is recommending 1 attic fan and a ridge vent and one is recommending 1 attic fan and 2 box vents.
Summary overview for contractors planning to install the cobra hip vent.
Two square feet equals 288 square inches.
Another way to achieve the proper amount of air flowage instead of using the 10 feet of ridge vent would be to use only a powered attic ventilator fan on the roof top but definitely not using any additional roof top exhaust vents.
Leave uncut sheathing of a 6 at gable ends.
There are two ways to vent an attic under a hip roof.
Explore owens corning ventilation products.
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You can install mushroom vents in the field of the roof or you can use the code formula that allows roofs with adequate soffit venting to omit ridge vents.
A normal metal pot vent produces only 50 squares inches of free net area.
The gaf cobra hip vent provides a great looking easy to install solution for effective exhaust ventilation on homes with.
Try covering the full ridge of the hip roof using cobra exhaust vent.
The leaving of this 6 defends the structure against wind propelled rains.