i have a 72x80 sliding closet doors how much bigger do i am the opening. I am framing a new closet

  • Hello, and welcome to Stack Exchange. Your question is a bit hard to understand; a few more sentences, and perhaps a diagram, would really help. Aug 24 '16 at 16:37

although every situation is different, generally when you frame the opening, add:

horizontal 3/4" to each side for the jamb (or whatever the jamb thickness is) 1/2" to each side for the gap for shimming the jamb 1/4" extra for bifold or french doors

vertical 3/4" to the height for the jamb (or whatever the jamb thickness is) 1/2" for the shimming at the top 3/8" to the bottom for the gap between door and floor (we usually do 1/2", or 3/4" if there are carpets or matts being used in winter

so for a 72 x 80 bypass door, your RO will be approx 75 x 82. since its a bypass door and the floor could be out of level, i would do 75 x 82 1/2.

remember too that trim will cover a lot of stuff up, particularly now when most casings are in the 4" or wider range.

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