To choose the proper jamb width for your pre-hung, you must determine the thickness of the wall where your door will be placed. Wall thickness includes the wall stud plus the sheetrock thickness. Normally, either 2×4 or 2×6 studs are used for wall framing. Sheetrock is usually either 1/2” thick or 5/8” thick. Determine your wall stud and sheetrock thickness and then use the charts below to select the proper jamb width to match your application.
Jamb Widths
- Stud Sheetrock Thickness Flat Jamb Width
- 2×4 Stud + 1/2” Sheetrock + 1/2′ Sheetrock = 4-9/16′ Wide
- 2×4 Stud + 5/8” Sheetrock + 5/8′ Sheetrock = 4-7/8′ Wide
- 2×6 Stud + 1/2” Sheetrock + 1/2′ Sheetrock = 6-9/16′ Wide
- 2×6 Stud + 5/8” Sheetrock + 5/8′ Sheetrock = 6-7/8′ Wide
