Roof Foam Vents

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.

Roof foam vents.

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. Eliminates snow and rain penetration. Allows flat straight non bulging ridge cap installation. Spray the foam.

These forms are only 1. Keeps pests and insects from penetrating. Temporarily secure long plastic forms between the rafters on the inside of the ceiling. When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic.

Seals around major ribs. 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. When set into place and sealed with spray foam the vent baffles are insulated and air sealed. Superior air flow adhesive and ease of installation make plyco quick vent the leader in foam vent technology.

Leave a gap on both sides. Build the rafters and secure the 5 8 inch cdx sheathing material. How to vent a foam insulated roof step 1.