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.
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
How Do I Measure Split Jamb Width?
Measure the total wall width, including sheetrock. That is all you will need to enter in Experlogix. It will calculate the Female Jamb as well as determine the size of the Custom Male Jamb.