Depending on how the roof is installed, the soffits are an intake area for roof ventilation. It is important to know what type of intake your roof requires when choosing which soffit to install. Some roofs intake through a gable vent and do not require intake through a soffit. Be mindful of the amount of ventilation necessary. If a roofing system does not get enough intake, it will age faster and require a roof replacement sooner than anticipated.