My bathroom is four years old and we installed a one piece bathtub shower combo and in the past year, I noticed black fungus? on the corner of the tub and drywall. I don't think my father put any caulking on the wall or the floor. Now with repeated washings, bleachings, my vinyl floor is yellowing and black crud in the cracks of tub and wall. How would I clean up the black crud fungus? I sure hate to dig into the drywall to get rid of the fungus but if it must be done, then it must be done. In the meantime, I am thinking of re doing the floor. I love the look of wooden floor but laminated floors looks pretty good. Are they good for bathrooms, wet areas? Or am I better off using real stone tile? I really do NOT want to rip up the vinyl we have in there since it was all inlaid all around the room before all the accessories were placed in there. I also have paint flaking off from my kitchen backsplash. It was painted vinyl after we drywalled it. Can I go ahead and tile it or do I need to score the wall first before tacking on the tiles to get the mud or glue a solid seal? I am also worried about water getting into the cracks where the tile and formica top meets. The kitchen was totally redone about five years ago and it is starting to show its age. The floor is very much like the bathroom, the gloss from the vinyl is gone and the ridges from the old wood floor is showing thru. With that much traffic going thru the kitchen, it looks like crap. Again, I love the laminated wood and tile effects. So what you all suggest???????????