Add Yahoo as a preferred source to see more of our stories on Google. Illustration: Ellie Schiltz/Getty Images A treehouse can be a magical place for children, who experience the space as a clubhouse, ...

In this episode, we build the rest of our first floor by notching and installing 20 more floor joists into the girders. The middle 10 floor joists are installed similarly to the first 10 shown in ...