Saw a stacked container build off Route 9 near Hudson and the seam flashing looked wrong
I was driving through Hudson last weekend and pulled over to look at a two story container build going up right off Route 9. The part that stuck with me was the flashing where the top box sits on the bottom one, it looked like they just ran a bead of caulk along the seam and called it done. That seems like it would pool water and rot the steel in a couple winters, but I have never built one myself. Am I wrong to worry about that, or is there a better way to handle the seam between stacked units?