Southern Utah's temperature swings and dry desert air pull carpet backing away from the tack strip the same way they do anywhere else in the house. On stairs that shrinkage shows up faster, because every tread already flexes and takes pressure that flat carpet in a bedroom never sees.
We see this most in two-story homes and rental properties around St. George and Washington, where stairs get used dozens of times a day by kids, pets, and moving traffic. A step that gives a little underfoot rarely fixes itself, and it is worth calling before someone catches a toe on a loose edge.
If one or two steps are affected, re-tacking and re-wrapping the nosing is usually enough. If the whole run has pulled loose from age, that is closer to a full carpet stretching job than a single-step fix, and we will tell you which one you actually need.
