Interior Door Rough Opening Size Chart

The difference between a rough opening and finished opening is usually 2 3 inches.

Interior door rough opening size chart.

Standard door rough openings. For example let s say we want to frame a 6 8 x 3 0 front entry door. For fire rated openings drywall must extend at least 1 2 into frame. The standard height of the rough opening for a door is the door height plus 2 5 8 inches.

This takes into account the thickness of a standard 3 4 inch doorjamb on each side. While a standard door height is 80 finished opening. If you re going to frame a rough opening for a door then you ll need to know the unit size. Interior knockdown frames that wrap wall a opening width 2 b opening height 1 the rough opening would be 38 x 85 for a 3 0 x 7 0 door frame.

Just add 2 to the width of the actual door size. Getting the rough opening size right the first time will save you from frustration when installing your doors. If you have questions give us a call at 888 458 5911. Refer to the charts below to determine what size of door you will need.

Add 2 to 2 1 2 inch to the measurement of the door s width to determine the total width of the rough opening. This will give you room to space the door frame off of the sub floor. The 6 8 stands for 6 8 tall and the 3 0 stands for 3 0 wide. For reference standard interior door widths range from 24 36 finished opening.

You should add 2 1 2 to the height of the actual door. The additional room allows for a 3 4 inch top jamb a shim.