Best Attic Ventilation For 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.

Best attic ventilation for hip roof.

Air flows in through the soffit vents and out through the roof vents. One big difference between these roofs and my roof was that these other homes had roof vents on three of the four sides. Vents come in various styles. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Many of these homes had hip roofs and are considered high end homes built about 8 10 years ago. Of attic floor space. Last updated september 2020. While hardly anybody agrees on the best roof ventilation system everybody agrees some roof vents do hardly any good at all.

Of net free area for every 150 sq. The leaving of this 6 defends the structure against wind propelled rains. If you see dampness or frost you need better roof ventilation and some attic vents. That makes it difficult to cool your house and it could even damage parts of your roof structure.

Take for example ridge vents. Modern building regulations say you must have roof vents but they re passive they don t do anything to create airflow. For the best results place roof ventilation near the roof s peak and soffit vents in the eaves. None of them had power attic fans.

Intake vents located at the lowest part of the roof under the eaves allow cool. This means for every 150 square feet of attic floor space there should be 1 square foot of net free area. All the homes with hip roofs had soffit intakes and static roof vents. The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows.

Grab a flashlight and inspect your attic during the winter. On a hot day the temperature in your attic can reach 150 f or more. At the time of the installation of exhaust vents ensure that you are aware of whether the hip roof features ridge boards not. Enter square footage calculate or enter the square footage of the attic or area to be vented.

Leave uncut sheathing of a 6 at gable ends. 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.