Exterior Door Rough Opening Size Chart

This takes into account the thickness of a standard 3 4 inch doorjamb on each side.

Exterior door rough opening size chart.

Just add 2 to the width of the actual door size. Use shims and or caulk to seal gaps between wall and frame. Standard door rough openings. You should add 2 1 2 to the height of the actual door.

Of frame is 40 x 86 as the frame face is 2 around all 3 sides. This will give you room to space the door frame off of the sub floor. Keep this in mind. You can also order a custom size pre hung door.

Add 2 to 2 1 2 inch to the measurement of the door s width to determine the total width of the rough opening. Getting the rough opening size right the first time will save you from frustration when installing your doors. Framing rough opening sizes are really quite simple. For example let s say we want to frame a 6 8 x 3 0 front entry door.

Therefore the rough opening would be 82 1 2 tall by 38 1 2 wide. The 6 8 stands for 6 8 tall and the 3 0 stands for 3 0 wide. If you re going to frame a rough opening for a door then you ll need to know the unit size. As you can see the standard exterior door size rough opening is a full 2 inches wider than 36 inches and 2 1 8 inches higher than 80 inches.

Frames that butt wall block or exterior wood stud a opening width 4 1 2 b opening height 2 1 4 the rough opening would be 40 1 2 x 86 1 4 for a 3 0 x 7 0 door frame.