Do I have to glue and back my rug?

This really depends on what the final pieces purpose is. I recommend gluing your rug so there's less of a chance of the yarn being pulled out. Backing is necessary if you want it to be a rug for the floor. I use an industrial final backing cloth to finish it or light weight canvas or muslin also works.

Curious about what kind of glue you can use? Check the FAQ page dedicated to this.