Hip Roof Ventilation Requirements

Since i ll apparently lose about 1ft at each end of the ridge for blending this is right at the limit.

Hip roof ventilation requirements.

Chapter 8 roof ceiling construction. 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. On the upcodes website. Always have a balanced ventilation system.

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. Roofer is recommending ridge vents and uses gaf cobra which has 16 9 nfa per lineal foot when hand nailed. 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. Contains sections covering roof framing roof sheathing and roof ventilation.

Chapter 9 roof assemblies. Enter your square footage. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation. Foot requires cobra exhaust vent structure of 17.

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. One method is to use a powered attic vent with a humidistat thermostat located close to the ridge or top of the roof. On the upcodes website. 2018 international residential code.

An attic room of 1 200 sq. Of course there should be intake vents to ensure a balanced system. A full 4 sheet with wafer cuts showing top and bottom uncut for 6 to gain cross strength. 2018 international residential code.

You could require compensating with additional exhaust. Hip vents get wafer cuts of 12 with 6 solid plywood intervals step 2. Figure 7 mechanical ventilation used with a hip roof.