I built a playhouse for my daughters a few years ago and it has a porch that is just part of the flooring (OSB housing floor) - I had painted the floor and that seemed ok for a while but now it's clearly pealing up and not looking too great. I would like to put some sort of decking to cover and protect it, but I'm unsure how to best protect the OSB from moisture.
My thoughts are
- Cover in some sort of plastic or tar paper, then just put decking over the top and ensure they fit together
- Cover it with a ton of liquid nails/ silicone and stick the decking over the top
- Other ideas??