Exterior Door Rough Opening Size

Standard door rough openings.

Exterior door rough opening size.

The rough opening size is the construction size with the side lumber studs and header. If you re going to frame a rough opening for a door then you ll need to know the unit size. The 6 8 stands for 6 8 tall and the 3 0 stands for 3 0 wide. Rough opening brickmould dim.

Keep this in mind. Use shims and or caulk to seal gaps between wall and frame. Framing rough opening sizes are really quite simple. Just add 2 to the width of the actual door size.

You should add 2 1 2 to the height of the actual door. Getting the rough opening size right the first time will save you from frustration when installing your doors. For example let s say we want to frame a 6 8 x 3 0 front entry door. Double inswing wide mullion unit and rough opening sizing lf ff ff rf fl fr lf rf fl fr viewed from the exterior hand designations f l r fixed panel left hand right hand inswing outswing.

This will give you room to space the door frame off of the sub floor. For the 36 x 80 exterior doors this rough opening will need to be 38 inches by 82 1 8 inches. Therefore the rough opening would be 82 1 2 tall by 38 1 2 wide. The rough opening for a 36 inch pre hung door is is 38 5 inches by 82 inches.

Double outswing wide mullion double wide mullion 6 6 6 8 7 0 8 0 rough opening brickmould dim. 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.