Interior Door Rough Opening Sizes

Getting the rough opening size right the first time, will save you from frustration, when installing your doors. 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. This will give you room to space the door frame off the sub-floor.

Interior Door RO Sizes
RO Width RO Height
ROH for 8/0 interior units is 98"
1/0 14" 82"
1/4 18" 82"
1/6 20" 82"
1/8 22" 82"
2/0 26" 82"
2/4 30" 82"
2/6 32" 82"
2/8 34" 82"
3/0 38" 82"
Interior Double Unit Ball Catches
RO Width RO Height
3/0 38" 82"
4/0 50" 82"
5/0 62" 82"
5/4 66" 82"
6/0 74" 82"
Interior Double Unit T-Astrigal
RO Width RO Height
3/0 38-1/2" 82"
4/0 50-1/2" 82"
5/0 62-1/2" 82"
5/4 66-1/2" 82"
6/0 74-1/2" 82"
Pocket Door Frame RO Sizes
RO Width RO Height
2068 49-3/4" 84"
2468 57-3/4" 84"
2666 61-3/4" 84"
2868 65-3/4" 84"
3068 73-3/4" 84"
2080 49-3/4" 100-1/2"
2480 57-3/4" 100-1/2"
2680 61-3/4" 100-1/2"
2880 65-3/4" 100-1/2"
3080 73-3/4" 100-1/2"

1500 KD Frame Formula to find RO Size

For 6/8 Height:
RO Width = Door Width x 2 plus 1"
RO Height = 84-1/2"

For 7/0 Height:
RO Width = Door Width x 2 plus 1"
RO Height = 88-1/2"

For 8/0 Height:
RO Width = Door Width x 2 plus 1"
RO Height = 100-1/2"

Note: 1500 KD frames for up to 200lbs.