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Home > Hollow Metal Doors > Hollow Metal Steel Door Installation Guides and FAQs > Hollow Metal Steel Door FAQs > Hollow Metal Door Frame Rough Opening Guide

Hollow Metal Door Frame Rough Opening Guide

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”

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