| Overall Wall Thickness | Jamb Extension | Pine or maple | Poplar or primed poplar | Oak | White PVC composite board | Tan PVC composite board |
|---|---|---|---|---|---|---|
| (a) | (b) | |||||
| 4 – 9/16″ | 2 – 1/2″ | • | • | • | • | • |
| 6 – 9/16″ | 4 – 1/2″ | • | • | • | • | • |
| Custom wall up to 6-9/16″ | Varies | • | • | • | • | • |
| Custom wall up to 6-9/16″ | Varies | • | • | • | • | • |
Custom wall = any wall thickness other than 4-9/16″ or 6-9/16″
Over 6-9/16″: Consult factory for availability
The jambs will extend to and be even with bottom of the window.