THE RAILING
1. Double up two 2' x 4's and run them through the notch you made in the final floorboard. The post should match the height of the 4' x 4' columns and ladder.
2. Lay 2'x 8's over the four corner railing supports.
3. Cut at a diagonal so each pair of sides meets to form a squared corner.
4. Nail balusters 6 inches apart to the outside of the floor frame and screw each to the top railing.
THE ROOF
1. Attach vertical 2' x 2's to each corner. Join with four horizontal 2' x 2's to make a rectangular frame.
2. Screw two other 2' x 2's at an angle to form a gable at each end and add a vertical support at the two center points.
3. Join the gables by laying a 2' x 2' between them.
4. Drape the frame with a tarp and staple down.
TIPS
• Set up flower boxes on the railing for experimental flower gardeners.• Add an address to your new treehouse--complete with a mailbox.
