For the height of the rough opening, you need to add 2 ½ inches to the height of the door. You may also find a few narrower doors in stock, including 30 inches, 28 inches, and 24 inches. So as you can see it would be an ideal size for your opening. The net frame size for a 30" exterior door is 31 1/2" x 81 1/2" so it leaves 1/2" on the top and both sides for your shims.. Unless your house is very old, you'll have little problem finding a door to fit. Yes, the 36 inch rough opening listed on the website is incorrect. Single or M.E.U. The rough opening would be 40-1/2″ x 86-1/4″ for a 3’0″ x 7’0″ door & frame. Asked by lawls August 12, 2020. If you have questions, give us a call at 888-458-5911. Standard Door Rough Openings. of frame is 40″ x 86″, as the frame face is 2″ around all 3 sides. For example, for a 30-inch door in a 32-inch rough opening, the headers will be 35 inches long to reach between the king studs and set atop the jack studs. Thank you for your inquiry. The most common door height is 80 inches, although most are available 78 inches tall as well. Single or M.E.U. Add 2 to 2 1/2 inch to the measurement of the door’s width to determine the total width of the rough opening. So, add 6″ for header. The rough opening should be 49 by 82 for a 48-by-80-inch door. Refer to the charts below to determine what size of door you will need. The required size of the finished opening for a 48-by-80-inch door is 48 by 82 inches. The correct rough opening would be 32 1/2 inches by 80 1/4 inches. If over 6 feet, windows get another trimmer each side. So if each door measures 30 inches wide, the width of the rough opening should be 62 inches. Answer. Single or M.E.U. When I frame rough openings I always go with the header sizes. Common interior door widths are 24, 28, 30, 32, and 36 inches. Height and width are often stated in feet and inches: 2-6 for 30 inches or 3-0 for 36 inches, for instance. If you’re going to frame a rough opening for a door then you’ll need to know the unit size. ... can fit the new door frame within the rough opening for the old door… For reference, standard interior door widths range from 24"-36" (finished opening). For standard wood framed construction the rough openings for doors and windows is typically the actual unit size plus 2-1/2 inches in height and width. The difference between a rough opening and finished opening is usually 2-3 inches. The specifications for this 30 inch door states that the rough opening is almost 36 inches. If your door’s height is 80 inches, then the height of the rough opening should be 82 ½ inches. 1. Learn more. Push the header against the top plate and transfer the cripple-stud marks to it, using a speed square. This allows for 1/2-inch-thick drywall on both sides and at the top, 80 inches for the doors and hardware, and a 1-to- 1 1/2-inch space under the door.The space between the floor and the bottom of the door may vary … - Outswing Brickmould Dim. Doors-always add 5″ and windows add 3″ for header sizes. While a standard door height is 80" (finished opening). 6/6, 6/8, 7/0, 8/0 Rough Opening Brickmould Dim. If you are speaking about a 30 inch door width 78 inch high If it is a interior door with 38mm frame leave opening 81 inches high 34 inches wide this includes the frame.plus clearance. *For M.E.U., add actual unit dimension to door rough opening width for total rough opening width. O.D. For example, let’s say we want to frame a 6/8 x 3/0 front entry door. Hello Angelsal07, That is a perfect rough opening for 30" exterior door. Common interior door widths range from 24 '' -36 '' ( finished opening is almost 36 inches add 3″ header... 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