Interior Door Rough Opening Size Chart

The height of common doors is 6 feet 8 inches.

Interior door rough opening size chart.

For reference standard interior door widths range from 24 36 finished opening. This will give you room to space the door frame off of the sub floor. You should add 2 1 2 to the height of the actual door. The standard height of the rough opening for a door is the door height plus 2 5 8 inches.

While a standard door height is 80 finished opening. Framing rough opening sizes are really quite simple. For fire rated openings drywall must extend at least 1 2 into frame. The 6 8 stands for 6 8 tall and the 3 0 stands for 3 0 wide.

The additional room allows for a 3 4 inch top jamb a shim. 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. Refer to the charts below to determine what size of door you will need. Therefore the rough opening would be 82 1 2 tall by 38 1 2 wide.

If you have questions give us a call at 888 458 5911. This takes into account the thickness of a standard 3 4 inch doorjamb on each side. If you re going to frame a rough opening for a door then you ll need to know the unit size. Just add 2 to the width of the actual door size.

For example let s say we want to frame a 6 8 x 3 0 front entry door. The difference between a rough opening and finished opening is usually 2 3 inches.