Part of a facade was renovated on my mother's summer cottage last summer. Now during the fall and winter, water has leaked in above the window. I have taken some pictures and have some thoughts that I would gratefully receive help with.
In the last picture, I have marked a few things.
Yellow: Approximately here, water is coming in above the window, but on the inside.
Red: Since I suspected the problem was here, I tried spraying water with the garden hose on this area and then saw that water started dripping above the window on the inside.
Blue arrow: The water flows in behind the panel here and flows out again at the edge of the metal tip.
What I suspect is that the fold on the metal at the bottom is too small, and some water runs over the edge behind the panel?
Does that sound like a likely cause?
I was thinking of replacing the metal with one that has a higher fold to ensure that all the water running behind the panel finds its way out again.
The carpenter who worked on parts of my glazing told me that on a reasonably flat roof like mine, during the worst storms, the wind can push water up the wall by about half a meter.
Your concern is not that water gets into the red area; the problem is that there isn't a wind barrier to prevent the water from continuing into the wall.
Additionally, it seems that the water coming in behind the panel in the yellow area cannot drain out again.
There is a reason for having an air gap that dries behind the panel. Against the window below, you would typically have an over-flashing as well that goes behind the panel so the metal catches water running behind the panel. It is this water that is now running in...
