Interior Door Rough Opening Size Chart

Standard door rough openings.

Interior door rough opening size chart.

You should add 2 1 2 to the height of the actual door. This will give you room to space the door frame off of the sub floor. Refer to the charts below to determine what size of door you will need. The height of common doors is 6 feet 8 inches.

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. Therefore the rough opening would be 82 1 2 tall by 38 1 2 wide. This takes into account the thickness of a standard 3 4 inch doorjamb on each side. If you have questions give us a call at 888 458 5911.

If you re going to frame a rough opening for a door then you ll need to know the unit size. The difference between a rough opening and finished opening is usually 2 3 inches. For reference standard interior door widths range from 24 36 finished opening. 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. While a standard door height is 80 finished opening. The standard height of the rough opening for a door is the door height plus 2 5 8 inches. Framing rough opening sizes are really quite simple.

Add 2 to 2 1 2 inch to the measurement of the door s width to determine the total width of the rough opening. The additional room allows for a 3 4 inch top jamb a shim.