I am unsure at this time what the panels are made of. I haven't had them out for 4-5 years. I am curious to what I have to do if I want to replace some of the floor boards. If it would be as easy as taking the old ones out and cutting new one from the old template. I know there was another thread on here awhile back where a guy redid the floors but I can't seem to find it. When I tackle this job this spring I will try and help but I now that doesn't help you now.