Is this pool vinyl or fiberglass?

No clues in the picture as to the pool surface.
 
If you can feel it, you'd know right away if it was rock hard like a boat (fiber) or a 'bag full of water' / rubbery. (Liner).

My wild guess would be vinyl liner due to shape and size. It could even always be plaster but probably not in PA.
 
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I am curious as to why a plaster pool is unlikely in Pennsylvania
They've definitely become more popular up north but most still don't want to spend as much with such short seasons.

The angles suggest an older pool with a newer liner. But I've been wrong a dozen times today and it's still early. :cheers:

The realtor should be able to find out real easy.
 
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