I've started a playhouse for my kids on a figure-it-out-as-I-go basis, and I finally hit the point where I'm recognizing how little I know about what I'm doing.
My specific question is what's my best option for a floor.
My first thought was to use SYP 2x6x10s, then I started worrying about how much weight that adds and thought SYP 1x6x10s, but I'm finding that those are hard to come by plus I don't really see anyone else doing that. It looks like most folks use plywood, but I need this to stand up to weather without a roof on it for a few months to a year, as we sort of build this through different iterations for different seasons of our kids lives. This first phase is going to be sort of an open air play deck with a climbing wall where they can make their own little tents and up there, on just an elevated deck surrounded with safety rails.
What I've got so far:
Pressure treated 4x4s, set in concrete 2 feet deep, three on one side and two on the other in an 8x10' perimeter, surrounded with 2x6's connected on the 10' side with half inch bolts at the corners, and on the 8' side with 3.5" 5/16 lag screws. My joists are 8' 2x4s at 17 inches on center, hung with joist hangers tapped in with 6 2.5" nails per hanger, and two 3.5" deck screws on each end. On the end with three 4x4 posts, a climbing wall to the top made of SYP 2x8x8s attached with 3.5" 5/16 lag screws.
Have I made any terrible errors so far?
What should I use for flooring?