What is my inground bottom?


LifeTime Supporter
Apr 12, 2007
Just got the old liner out and am in the process of measuring for a new vinyl liner. Am looking at the floor of the pool and at first I thought it was concrete when looking at the shallow end. There was lose sand all around the edge, though. Then after looking around more, and gouging around with a screwdriver, I deducted that is was all packed sand. However on the slope it is real shiny and has a white powdery film. With my research around the internet, and seeing the different types of floors that can be used, can any one tell me what my bottom is? I have never seen poolcrete or vermiculite but I am assuming this would be in line w/ a type of concrete, but not sure. I have no idea how old the pool is, if that is one of your questions? Thanks Kay


Mod Squad
LifeTime Supporter
Platinum Supporter
TFP Expert
In The Industry
Apr 1, 2007
Sebring, Florida
Sure, vinyl liner pools always (virtually) have either a compacted sand bottom or vermiculite. Since your description eliminated plain sand, vermiculite is all that's left.