Many fiber-cement siding jobs that look fine from a distance actually have serious installation defects.
An attempt to repair poorly attached fiber-cement siding by face-nailing it still didn't conform to manufacturer specifications.
Butt joints should land over studs, but these were offset 24 inches over 16-inch on-center framing, so many of the ends were inadequately supported.
For this siding product, blind nails must be at least 1 inch from the top edge. This one was not even close.
Inadequate fastening allowed the siding to vibrate when the wind blew, no doubt contributing to the early demise of many of the fasteners.