Have a 24ft X 20ft carport, roof with no walls which means it is exposed to blowing dirt, blowing rain and rain water runoff from the roof. Like the idea of the vented tiles because of the inability to seal the edges of 'solid' tiles to keep runoff water from seeping under and just sitting there. Would the male/female edging actually seal the edges?? Would need edging for 3 sides - ballpark pricing?