A patio jamb is machined with a recessed dado to allow a screen to be used with a patio door. This dado acts as a guide for the screen itself to move back and forth.
![](https://learn.reeb.com/wp-content/uploads/2019/03/kb-exterior-patiojambwtrack.jpg)
Patio jambs are typically 6-9/16″ in depth, but a 4-9/16″ depth jamb can also be used by applying a screen track on the underside of the brickmould.
![](https://learn.reeb.com/wp-content/uploads/2019/03/kb-exterior-4916jambwtrack.jpg)