How to Properly Ventilate a Vaulted Roof

Vaulted roof ceilings, sometimes referred to as cathedral ceilings, take the interior ceiling line right up to the roof line, eliminating an attic or crawl space. These ceilings create ventilation issues because of the lack of attic space. Mold issues can develop between rafters as heat creates moisture, condensing in the space between the ceiling and exterior roof. If the room doesn't have proper ventilation, you'll need to do some degree of remodeling.

Tall ladder
Goggles
Work gloves
Crowbar
Screwdriver
Measuring tape
Utility knife
Vent chutes

Instructions

- 1
  Climb the ladder and examine all soffit vents along the eaves of the house. These are air intake vents that promote airflow from the lower part of the ceiling frame. Soffit vents should be open and free from obstructions such as paint, leaves and animal debris.
- 2
  Check the roof ridge for ridge vents, which allow hot air to rise to the top and be released. Clear any debris or obstructions from the vents.
- 3
  Remove the ceiling drywall panels inside the house. You may need to pry them off the ceiling with a crowbar to expose the rafter and truss framing. Look between rafters to see if vent chutes are installed between rafters for airflow. Allow at least 2 inches of space between the ceiling and rooftop. Remove any excess insulation with the utility knife.
- 4
  Remodel as needed to properly ventilate the room. Obtain proper building permits to install soffit and ridge vents. Place vent chutes between rafters leading to soffit vents and connecting to ridge vents. Seal ridge edges with insulation to promote proper airflow direction and maintain proper insulation within the home as well. You will need 1 square foot of venting space for every 150 square feet of cathedral ceiling, equally dividing this number between soffit and ridge vents.

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