Wall Framing, Second Floor Joists

Rudi and I continued with more wall framing and second floor joists, as well as some OSB sub floor on the second (or attic) floor. Rain was forecast, so I wanted to get a rubber tarp over the second floor to protect it and the shed pine laid as the finish floor below. Some clear garbage bags offer a bit of additional rain protection

The Finish Floor

I found a good deal on six foot lengths of relatively clear pine, commonly sold as 'shed pine'. It is a nominal 1" x 10" board, measuring 3/4" x 9-1/4", perfect for flooring when laid over the 7/16" OSB sub floor, especially considered I have my joists at 12" centres.

The nice thing is that they come typically in 6' lengths, so I didn't have to cut them at all, simply lay them out, glue them, and nail them down, then position the partly assembled walls on them and screw them down.

Some Bad News

Scratch the idea of using the reclaimed maple hardwood for the finish floors of the treehouse, as storing them outdoors under a tarp let them get wet and sodden... About one quarter of the entire lot is salvageable, which is probably not enough for the 70 square foot required. Lesson learned, and off to plan B, which is probably 1" x 10" shed pine laid over the OSB, or something similar.

Laying Down Subfloor

Materials - Sub Flooring

From the main beams and floor joists upwards, the bulk of the building materials used in the treehouse will be either recycled or reclaimed material. The floor where the building of the treehouse is to be situated will be 7/16 OSB sub floor, with reclaimed tongue and groove maple hardwood on top. The OSB is offcuts and scrap roofing material, from the local subdivision. The easiest way to get as much scrap building materials as you want is make friends with the framing crew supervisor, bring the gang four Tim Horton's coffee one morning, and they will give you run of the scrap bin! That's how I do it at least.