Hip Roof Ventilation Requirements

One method is to use a powered attic vent with a humidistat thermostat located close to the ridge or top of the roof.

Hip roof ventilation requirements.

On the upcodes website. A number of problems that could come up when trying for the ventilation of hip roofs is able to be that there s possibly not sufficient exhaust ventilation. Hip vents get wafer cuts of 12 with 6 solid plywood intervals step 2. Figure 7 mechanical ventilation used with a hip roof.

2018 international residential code. 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. You could require compensating with additional exhaust. An attic room of 1 200 sq.

Chapter 9 roof assemblies. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation. Enter your square footage. Calculate or enter the square footage of the attic or area to be vented.

Exhaust intake of 50 50 requires 17 5 feet which is insufficient but i see some say 40 60 is acceptable and this then reduces to 14ft. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. Since i ll apparently lose about 1ft at each end of the ridge for blending this is right at the limit. Chapter 8 roof ceiling construction.

2018 international residential code. Roofer is recommending ridge vents and uses gaf cobra which has 16 9 nfa per lineal foot when hand nailed. On the upcodes website. Always have a balanced ventilation system.

Foot requires cobra exhaust vent structure of 17. A full 4 sheet with wafer cuts showing top and bottom uncut for 6 to gain cross strength. And in many of these cases the hip roof forms a large volumetric attic space to ventilate.