My wife is having a baby in October and we have a finished basement that we spend a lot of time in. But the stairs down are open on one side so of course I am worried about the kid down the road. I was thinking of using deck railing materials a railing top screwed into the ceiling and the stairs and deck rails less then 4 inches on center apart, but the only ones I can find are pressure treated and I don't like the idea of using that in the house, any good ideas?