How To Ventilate A Hip Roof

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.

There are two ways to vent an attic under a hip roof. The gaf cobra hip vent provides a great looking easy to install solution for effective exhaust ventilation on homes with. Leave uncut sheathing of a 6 at gable ends. A normal metal pot vent produces only 50 squares inches of free net area.

Try covering the full ridge of the hip roof using cobra exhaust vent. Explore owens corning ventilation products. Hip and ridge shingles starter shingles low slope products ice and water barrier synthetic underlayment intake ventilation exhaust ventilation titanium and rhinoroof. 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.

Two square feet equals 288 square inches. The calculations before indicated that we needed 2 square feet of ridge or upper roof ventilation. So we would need at least six metal vents in addition to the lower soffit ventilation to meet minimum ventilation requirements. The leaving of this 6 defends the structure against wind propelled rains.

Summary overview for contractors planning to install the cobra hip vent. 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.