Hip Roof Ventilation Requirements

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.

Hip roof ventilation requirements.

A full 4 sheet with wafer cuts showing top and bottom uncut for 6 to gain cross strength. On the upcodes website. Calculate or enter the square footage of the attic or area to be vented. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation.

Chapter 8 roof ceiling construction. Enter your square footage. Chapter 9 roof assemblies. Contains sections covering roof framing roof sheathing and roof ventilation.

Roofer is recommending ridge vents and uses gaf cobra which has 16 9 nfa per lineal foot when hand nailed. 2018 international residential code. Foot requires cobra exhaust vent structure of 17. Since i ll apparently lose about 1ft at each end of the ridge for blending this is right at the limit.

On the upcodes website. 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. Of course there should be intake vents to ensure a balanced system. Always have a balanced ventilation system.

You could require compensating with additional exhaust. 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. 2018 international residential code. One method is to use a powered attic vent with a humidistat thermostat located close to the ridge or top of the roof.

An attic room of 1 200 sq. Hip vents get wafer cuts of 12 with 6 solid plywood intervals step 2. Figure 7 mechanical ventilation used with a hip roof.