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Hollow Metal Door Frame Rough Opening Guide

This guide is created to help customers and contractors determine the proper rough opening for a give metal frame. Simply determine the frame type you wish to use and follow the easy to use formula below to calculate your rough opening. A table at the bottom of the page is also available with rough opening dimensions for common frame sizes.

Interior Knock Down Metal Frames That Wrap Around The Wall:


Rough Opening Width = Door & Frame Width + 2"
Rough Opening Height = Door & Frame Height +1"


Example: If your door package is a 3'0" x 6'8" package, then the rough opening would be 38" x 81"

Exterior Knock Down or Welded Metal Frames That Butt Against The Wall:


Rough Opening Width = Door & Frame Width + 4-1/2"
Rough Opening Height = Door & Frame Height + 2-1/4"


Example: If your door package is a 3'0" x 6'8" package, then the rough opening would be 38" x 82-1/4"

Rough Opening Chart For Common Metal Door Frame Sizes:


Interior Knock Down Hollow Metal Door Frames That Wrap Around The Wall:

Door & Frame Size: 2’0” x 6’8” Rough Opening Size: 26“ x 81”
Door & Frame Size: 2’4” x 6’8” Rough Opening Size: 30“ x 81”
Door & Frame Size: 2’6” x 6’8” Rough Opening Size: 32“ x 81”
Door & Frame Size: 2’8” x 6’8” Rough Opening Size: 34“ x 81”
Door & Frame Size: 3’0” x 6’8” Rough Opening Size: 38“ x 81”
Door & Frame Size: 3’4” x 6’8” Rough Opening Size: 42“ x 81”
Door & Frame Size: 3’6” x 6’8” Rough Opening Size: 44“ x 81”
Door & Frame Size: 3’8” x 6’8” Rough Opening Size: 46“ x 81”
Door & Frame Size: 4’0” x 6’8” Rough Opening Size: 50“ x 81”
Door & Frame Size: 2’0” x 7’0” Rough Opening Size: 26“ x 85”
Door & Frame Size: 2’4” x 7’0” Rough Opening Size: 30“ x 85”
Door & Frame Size: 2’6” x 7’0” Rough Opening Size: 32“ x 85”
Door & Frame Size: 2’8” x 7’0” Rough Opening Size: 34“ x 85”
Door & Frame Size: 3’0” x 7’0” Rough Opening Size: 38“ x 85”
Door & Frame Size: 3’4” x 7’0” Rough Opening Size: 42“ x 85”
Door & Frame Size: 3’6” x 7’0” Rough Opening Size: 44“ x 85”
Door & Frame Size: 3’8” x 7’0” Rough Opening Size: 46“ x 85”
Door & Frame Size: 4’0” x 7’0” Rough Opening Size: 50“ x 85”
Door & Frame Size: 3’0” x 8’0” Rough Opening Size: 38” x 97”
Door & Frame Size: 4’0” x 8’0” Rough Opening Size: 50” x 97”
Door & Frame Size: 6’0” x 6’8” Rough Opening Size: (Double Doors) 74” x 81”
Door & Frame Size: 6’0” x 7’0” Rough Opening Size: (Double Doors) 74” x 85”

Exterior Knock Down or Welded Hollow Metal Door Frames That Butt Against The Wall:

Door & Frame Size: 2’0” x 6’8” Rough Opening Size: 28-1/2“ x 82-1/4”
Door & Frame Size: 2’4” x 6’8” Rough Opening Size: 32-1/2“ x 82-1/4”
Door & Frame Size: 2’6” x 6’8” Rough Opening Size: 34-1/2“ x 82-1/4”
Door & Frame Size: 2’8” x 6’8” Rough Opening Size: 36-1/2“ x 82-1/4”
Door & Frame Size: 2’10“ x 6’8” Rough Opening Size: 38-1/2“ x 82-1/4”
Door & Frame Size: 3’0” x 6’8” Rough Opening Size: 40-1/2“ x 82-1/4”
Door & Frame Size: 3’4” x 6’8” Rough Opening Size: 44-1/2“ x 82-1/4”
Door & Frame Size: 3’6” x 6’8” Rough Opening Size: 46-1/2“ x 82-1/4”
Door & Frame Size: 3’8” x 6’8” Rough Opening Size: 48-1/2“ x 82-1/4”
Door & Frame Size: 4’0” x 6’8” Rough Opening Size: 52-1/2“ x 82-1/4”
Door & Frame Size: 2’0” x 7’0” Rough Opening Size: 28-1/2“ x 86-1/4”
Door & Frame Size: 2’4” x 7’0” Rough Opening Size: 32-1/2“ x 86-1/4”
Door & Frame Size: 2’6” x 7’0” Rough Opening Size: 34-1/2“ x 86-1/4”
Door & Frame Size: 2’8” x 7’0” Rough Opening Size: 36-1/2“ x 86-1/4”
Door & Frame Size: 2’10“ x 7’0” Rough Opening Size: 38-1/2“ x 86-1/4”
Door & Frame Size: 3’0” x 7’0” Rough Opening Size: 40-1/2” x 86-1/4”
Door & Frame Size: 3’4” x 7’0” Rough Opening Size: 44-1/2“ x 86-1/4”
Door & Frame Size: 3’6” x 7’0” Rough Opening Size: 46-1/2“ x 86-1/4”
Door & Frame Size: 3’8” x 7’0” Rough Opening Size: 48-1/2“ x 86-1/4”
Door & Frame Size: 4’0” x 7’0” Rough Opening Size: 52-1/2“ x 86-1/4”
Door & Frame Size: 3’0” x 8’0” Rough Opening Size: 40-1/2” x 98-1/4”
Door & Frame Size: 4’0” x 8’0” Rough Opening Size: 52-1/2” x 98-1/4”
Door & Frame Size: 6’0” x 6’8” Rough Opening Size: (Double Doors) 76-1/2” x 82-1/4”
Door & Frame Size: 6’0” x 7’0” Rough Opening Size: (Double Doors) 76-1/2” x 86-1/4”