I've recently started smelling a musty smell in my upstairs bedroom. The bedroom closet just happens to be where the downspout from the main roof drains onto the roof for my garage and creates a kind of corner in the roof. As I have been looking into it, how the downspout has been configured feels completely wrong.
Is there any way this makes sense? Why angle to downspout into/up the slope of the shingles as opposed to out and across the slope/away from the siding?
The shingles overlap each other. This ensures that water running from top down doesn't enter under them.
When you flush water against the overlapping sections, they are not water proof. Water may enter under the top shingle.
You should ensure that water flows from shingle on top to shingle under it.
That down spout is the termination point for ALL the rain water on that side of the roof! All that water is being directed to a small area and shot against the overlap of the shingles.
Do yourself a favor and remove all the gutters and downspouts on the second floor. Let the roof shed the rain as it was designed to do and let the lower roof collect the rain. You then don't have all that water concentrated in one small area.
