How far should vinyl siding overlap a block foundation? I have heard that water can travel upward more than an inch during wind storms. Can you comment on this?
During wind-driven rains a pressure difference may develop between the inside of the wall and the outside. Water can move upward almost 2 inches during a 60-mph wind. I recommend lapping the vinyl siding 3 to 4 inches down beyond the top of the block wall whenever possible.