My ramps got 9mm OSB board screwed in as a bottom layer and that stuff works fine. If you were to paint it with stain / masonry paint prior to laying your riding surface you’d make it last longer for sure. 2 layers definite, cheap underneath with 9mm better wood on top that’s what I did; and then cover with a tarp when required if you expecting heavy rain. Clearly marine or skate lite would be the best but I used 9mm WPB board stained and then painted in masonry and it’s holding up pretty good.
1 Like
