Southern Utah's temperature swings and low humidity dry out seam tape adhesive faster than it would in a milder climate, which is one reason a seam that held for years suddenly lets go. We see this in homes across St. George and nearby Washington just as often as anywhere else.
The other common trigger is simple traffic. A seam placed in a doorway or hallway gets crossed dozens of times a day, and Saint George's red desert dirt works its way into the fibers along that line, which speeds up fraying at the edge.
A ridge running along the seam, known as peaking, is usually a stretch or install issue rather than a split. If what you're seeing is actually at a doorway threshold or where carpet meets another floor, carpet transition repair is often the more direct fix.
