Guys I need some advice & info on this. My SIL has a Ranch house but hers is on a concrete slab. The house was made in late 1950's No idea of the thickness of the slab She has never had a issue with any of her floors getting wet, her kitchen has wood laminate floors that were put over linoleum. Her living room has a fireplace & she had a rug that was taken up & my wife says a plastic sheet (used as a vapor barrier) was put down then laminate floor over that. This was done in Feb, now she has water coming up through the laminate floor one place is where the laminate touches the porcelain, ceramic tile??? (not sure what it is) when you step on the laminate the water comes up through the joints. you see water damage about half the room especially at the joints. She was told that a sub floor should have been put down but if that is the case her front door wouldn't open due to the thickness of the sub floor???????
Basic info on the guy who did the work. He is in charge of special projects in charge of outside contracting for Providence College where my wife & SIL work. He is a good carpenter & has done some good quality work in my SIL's house.
My questions are:
1. should something like drylock water proofing be done before laminate floor was put down.
2. should a vapor barrier be put down? this would stop the concrete from breathing???
3. Should a sub-floor have been put down???
Any help or advice you can give me I'll furnish to my SIL to give her ammo to talk to the guy who did the work.
Chuck # ???
Here is some pics of it.
Kitchen floor. no problems