Exterior Door Rough Opening Size Chart

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

Exterior door rough opening size chart.

The 6 8 stands for 6 8 tall and the 3 0 stands for 3 0 wide. Use shims and or caulk to seal gaps between wall and frame. You should add 2 1 2 to the height of the actual door. The rough opening size is the construction size with the side lumber studs and header.

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. Standard door rough openings. 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. Keep this in mind. Of frame is 40 x 86 as the frame face is 2 around all 3 sides.

Therefore the rough opening would be 82 1 2 tall by 38 1 2 wide. This will give you room to space the door frame off of the sub floor. You can also order a custom size pre hung door. 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.

For example let s say we want to frame a 6 8 x 3 0 front entry door.