A “qualified roofer” simply caulked the gap on the other two similar downspouts.
Caulk seems insanely risky for this application, which is why I’m posting.
The roof has zero scuppers, two roof edge overflows, and three mid-roof downspouts. Each mid roof downspout is similarly constructed. Two have caulk in the gap, one is just open to the air as pictured.
Ah, but that one can’t be used, because that’s for a wall scupper, not for a toilet style downward drain.
Why did they use a downspout? Likely because that’s where the original tar and gravel roof downspout was, in this 1940’s building.
A round TPO downspout is:
Anyone seen a square version of this used in the field?
Have a picture of a better way to do this?
The other issue with the prefabricated units is they end up leaving water puddles.
This is an old school wood decked roof, not a more modern foam insulation base. With the foam you can carve the foam to create the drainage pattern needed.