My buddy has a pretty good sized steel shop (approx 20' x 30') that has an issue. The center roof cap that covers the corrugated roof panels has openings along the entire roof line for ventilation, which is fine, but ...

The cap only overlaps each side by ~ 8" and allows dust and leaves to blow in. The shop is about 10 years old and everything inside is covered with dust and debris. To me, it's a crappy design and I would have contacted the manufacturer or installer many years ago but that's not an option now.

What's the best way to take care of this problem?

Getting on the roof to do repairs doesn't sound good unless you used a man lift(s) and/or scaffolding. The sheet metal is too thin to walk on.

Any thoughts?