Cathedral Ceiling Attic Ventilation

Each slope of the roof is divided roughly in thirds by 3 different situations.

Cathedral ceiling attic ventilation.

Cathedral vaulted or any ceiling that has insulation blocking the airflow from the soffit vents to the attic needs an attic baffle in each rafter bay. As much as regular attic ventilation is an important part of your house maintenance routine and usually easy to perform cathedral ceiling ventilation maintenance might be difficult or even impossible to do. Even with the attic bypasses sealed and effective vapor retarders installed proper ventilation is essential to prevent moisture problems in cathedral ceilings. Knee walls at the outer thirds cathedral ceiling in the middle thirds and a vented attic in the middle third with a ridge vent a common situation with finished attics at least around here.

Reduce under roof insulation level to 3 fiberglass r 11 under the cathedral ceiling not good energy savings not recommended but functional just poor insulation value. Depending on your house interior and roof framing design cathedral ceiling ventilation can be treated as an independent or attic ventilation related condition. Here are some older home cathedral ceiling roof insulation and ventilation options that you may consider.