I have press-on tiles in my bathroom. We noticed they are getting spongy near the cooling vent. When I press it with my foot, I can see little bit of water coming up between the cracks. Duct work is underneath that floor (I believe).
Is it because duct is getting too cold and leaving moisture or there is some sort of pipe leak? I cannot see the pipe or anything from underneath but it could that duct is hiding it.
Do I need to worry about it and get it checked or is it normal? Do I need to call plumber or a handy man?