Could The Edge Vent be used under concrete tile? The load is 10 pounds per square foot.
Air Vent has not looked at this application in detail, but it could possibly work. Underlayment will have to cover the product regardless of the roof covering material. It should be able to handle the static load of 10#/sq. ft. with no problem. The concerns include attachment of the product to the roof deck and elevating the first course of tile to match the rest of the roof.
We rely not only on the 10 pre-fastening locations of The Edge Vent to secure the product to the roof deck, but also the nails for the starter course and first course shingles. With a tile installation, these additional fasteners are not installed to help secure the product to the roof.