The rigid foam is cut to be 2 inches wider than the space between rafters then 1 inch of foam is scored and folded over on either side of the foam creating standoffs that hold the foam away from the roof sheathing providing a space for air to flow.
Roof foam vents.
Eliminates snow and rain penetration.
How to vent a foam insulated roof step 1.
When set into place and sealed with spray foam the vent baffles are insulated and air sealed.
Allows flat straight non bulging ridge cap installation.
Leave a gap on both sides.
One of the most common reasons to put spray foam on the roofline is to avoid having to air seal the attic floor because the attic is connected with the air in the house and indoor air is more humid than outdoor air which can cause moisture problems.
The plyco quick vent advantage.
Temporarily secure long plastic forms between the rafters on the inside of the ceiling.
Even small amounts of condensation can substantially reduce the r value of the insulation creating faster heat loss into the attic space and eventually leading to mold mildew rot ice damming and loss of.
Seals around major ribs.
These forms are only 1.
Keeps pests and insects from penetrating.
Superior air flow adhesive and ease of installation make plyco quick vent the leader in foam vent technology.
Spray the foam.
It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters connectors or end plugs needed.