The ventilation for this roofing system will be provided by Styrofoam that’s to keep the insulation between the vaulted ceiling and roof rafters channelized. This ventilation system will allow air to move through the vaulted ceiling where there is insulation.

On the rear portion of the roof, the deck boards will need to be removed and replaced to add back the insulation channels. These deck boards at the west-facing slope of the roof are warping as a result of bad Ventilation.