I am trying to replace the rotten part of my screen porch. It is the board that acts as windowsill. But that is not where I am stuck. On the outside, the board is covered by flashing, which I’ll have to replace too. It seems to be just flat sheet metal which was bent lengthwise 90 degree, one ridge, no drip edge. I can not find flashing like this, just drip edges. What can I use to replace this?
