Exterior Door Rough Opening Size Chart

The rough opening size is the construction size with the side lumber studs and header.

Exterior door rough opening size chart.

These doors should be installed by a knowledgeable pro because the rough in opening in the wall will have to be enlarged. Keep this in mind. Of frame is 40 x 86 as the frame face is 2 around all 3 sides. For example let s say we want to frame a 6 8 x 3 0 front entry door.

This will give you room to space the door frame off of the sub floor. This takes into account the thickness of a standard 3 4 inch doorjamb on each side. You can also order a custom size pre hung door. Just add 2 to the width of the actual door size.

For the 36 x 80 exterior doors this rough opening will need to be 38 inches by 82 1 8 inches. Framing rough opening sizes are really quite simple. Getting the rough opening size right the first time will save you from frustration when installing your doors. Standard door rough openings.

If you re going to frame a rough opening for a door then you ll need to know the unit size. 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. 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. You should add 2 1 2 to the height of the actual 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.