A.I know of one company, Lomanco (P.O. Box 519, Jacksonville, AR 72076; 800/643-5596), that makes a combination drip edge and continuous soffit vent (see illustration). For the vent to work, a gap must be left between the lower edge of the roof sheathing and the top edge of the wall sheathing. The vent/drip edge is then nailed along the eaves and roofed over.
to read the full article.