This simple little device represents the kind of creative thinking that’s brought us to the point of living in houses (with roofs) and not in caves.
Duane Mackey designs home additions, so he came up with this brilliant idea that lets you estimate the pitch of a roof safety from terra firma. He’s posted the plans on how to make one at MakeProjects.com.
Just print it out, glue it to some card stock and add a couple of Rivets.
You can also download the PDF at RoofGuessEstimator.com