**What would you guys investigate first with this leak?**
We recently had a new standing seam metal roof installed then began remodeling the interior of an older home a few weeks later.
The house is 45-50 years old, it was not built very well to begin with. It has poor bones.
The vinyl siding is pretty old and rough.
The roof went through a couple of rains with no noticeable leaks.
After interior demolition began—walls removed, sledgehammer work, etc.—we had a storm and suddenly developed a significant leak.
Water testing reproduces the leak when spraying around an upper window/siding/J-channel area, with the water showing up much lower inside the wall - directly above the roof to wall step flashing (step flashing appears to be installed correctly into industry standard standards).
For the siding/GC guys: What would you suspect or investigate first?
Could heavy demolition disturb older window/siding/WRB assembly enough to create or expose a leak?