Eileen, we have put one full season on ours, and it is as good as new.
As I used a glue-down cork (LINK
), I had to remove the vinyl. I wanted to anyway, as it would just be dead weight
And you are right, it is the polyurethane that gives it is surface durability and waterproofing.
Having used cork numerous times on work projects, I really do think it is an ideal solution to flooring in our trailers. Warm in both colour and to the touch of your feet, plus with a good wearing and waterproof surface, it is a great choice. I would do it again in a heartbeat.