re: Home Humidity, HVAC cycling, and LVP Flooring

How old is the house? Possible a vapor barrier was not installed under the slab? What kind of flooring did you remove?

We had significant humidity issues due to both oversized HVAC and poor construction/flashing/sheathing damage. It's worse, as you mentioned, in cooler weather when the HVAC isn't running. Humidity leads to mold pretty quickly in the south, and mold sucks. You want to get this under control ASAP. We ended up making a lot of repairs to the house that improve the envelope, but also added a whole-home dehumidifier and are VERY happy that we did.