Exterior Door Rough Opening Size Chart

Just add 2 to the width of the actual door size.

Exterior door rough opening size chart.

Getting the rough opening size right the first time will save you from frustration when installing your doors. Keep this in mind. 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. Standard door rough openings.

Framing rough opening sizes are really quite simple. Therefore the rough opening would be 82 1 2 tall by 38 1 2 wide. For the 36 x 80 exterior doors this rough opening will need to be 38 inches by 82 1 8 inches. This takes into account the thickness of a standard 3 4 inch doorjamb on each side.

Use shims and or caulk to seal gaps between wall and frame. You can also order a custom size pre hung door. This will give you room to space the door frame off of the sub floor. These doors should be installed by a knowledgeable pro because the rough in opening in the wall will have to be enlarged.

Add 2 to 2 1 2 inch to the measurement of the door s width to determine the total width of the rough opening. Of frame is 40 x 86 as the frame face is 2 around all 3 sides. You should add 2 1 2 to the height of the actual door. For example let s say we want to frame a 6 8 x 3 0 front entry door.

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