The door jamb is the frame that installs in the wall and supports the door via hinges.

Door jamb width. Door jamb thickness interior door jamb:. The width of door panels of standard bifold doors meant for internal installation. This is the ideal thickness.

You need to figure out if sheer ply plus finished material plus interior sheet rock. When measuring to replace a slab door, measure the width, height, and thickness of the door. In an interior door its 5 1/2 +sheet rock 1in.

Measure from the door frame to where the drywall starts, this is your casing, the measurement of the size trim you will put around the door. The jamb width is the width of the jamb as it meets the wall stud of your house. Focus on these two equations, 2 side jamb length = door height + jamb stock thickness + ¾ inches + ½ inches + 3/32 inches.

Many people measure the inside jamb of the door and decide that this is the jamb width; Likewise, single doors with sidelight (s) will need to include the width of the sidelight (s) itself in the full door. Top jamb length = door width + 3/16 inch +.

Door jambs must cover the entire thickness of the wall where the door will be placed. Wall thickness includes the wall stud plus the sheetrock thickness. To measure a door jamb, you’ll measure from the visible edges of the jamb, which is why it’s important to remove the casing first.