find moisture under carpet 2

https://moldgrowthcarpetbackingreport.timeforchangecounselling.com/understanding-mold-growth-on-carpet-backing-causes-risks-and-solutions

You pull back the corner of the carpet and there it is—dampness, maybe even a faint musty smell rising up. Finding moisture under carpet often means a hidden leak, poor ventilation, or a slow seep from the slab beneath. If left alone, it can warp the flooring, breed mold, and become a bigger headache. It's one of those issues you catch early or regret later.