On our house we have a second story walkway/deck that is finished with a thin layer of concrete. When it was built 7 years ago, it appears that they design was faulty - the builder installed a drip edge (before laying the concrete), but the edge doesn't stick out far enough to prevent the water from dripping down the hardie fascia boards.
Over time, water dripping has caused staining and paint peeling from the fascia boards, as well as causing water to run down the face of the cedar support posts and onto the patio below.
I am looking for a solution (presumably installing a drip edge or rail) without having to remove the existing drip edge, given that would then require refinishing the concrete finish above. I've looked at the drip edges at Home Depot and Lowes, but haven't found one that is shaped appropriately to fit yet.
Maybe this could be solved by adding seamless gutters?
Its difficult to see the whole situation from tha picture, but either wrapping the hardie board with fascia or if design allows install gutters under the existing dripedge.
Either of those would be easier and less costly than pulling up the cement decking.