Exterior Door Rough Opening Size Chart

Use shims and or caulk to seal gaps between wall and frame.

Exterior door rough opening size chart.

For example let s say we want to frame a 6 8 x 3 0 front entry door. The 6 8 stands for 6 8 tall and the 3 0 stands for 3 0 wide. These doors should be installed by a knowledgeable pro because the rough in opening in the wall will have to be enlarged. 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.

This takes into account the thickness of a standard 3 4 inch doorjamb on each side. For the 36 x 80 exterior doors this rough opening will need to be 38 inches by 82 1 8 inches. 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.

The rough opening size is the construction size with the side lumber studs and header. Therefore the rough opening would be 82 1 2 tall by 38 1 2 wide. Framing rough opening sizes are really quite simple. Standard door rough openings.

You can also order a custom size pre hung door. Getting the rough opening size right the first time will save you from frustration when installing your doors. Keep this in mind. Add 2 to 2 1 2 inch to the measurement of the door s width to determine the total width of the rough opening.

You should add 2 1 2 to the height of the actual door.