Comments on: Rough Openings | Standard Framing Dimensions

By: Todd

Todd — Mon, 22 Apr 2013 10:40:16 +0000

Yes sir :) However, if you have certain special doors that number might change, some outswing French doors and some Andersen units are different so check the spec with the door.

By: grandpa bear

grandpa bear — Sun, 21 Apr 2013 21:00:16 +0000

will the rough opening for a double door still be the nominal dimensions + 2.5 inches in both height and width?

By: Todd

Todd — Tue, 15 Jan 2013 12:49:26 +0000

Rick,

Here’s what the article says:

“Window rough openings are framed in a similar way to door openings. Again I like to use examples so let’s say we’ve got a 3′ wide by 4′ tall window unit then the rough opening would be 38-1/2″ wide and 50-1/2″ tall. Now, most window manufactures actually specify a standard rough opening which is typically a bit tighter so it’s best to follow the manufacturers recommendations when possible.”

As I noted, some manufacturers use a tighter dimension. 2-1/2 inches is the industry standard, many window manufacturers adjust after framing. Framing usually happens, then windows are ordered based on rough-openings.

By: rick hudson

rick hudson — Tue, 15 Jan 2013 12:29:50 +0000

Your web site says window rough opening should be 2 1/2″ over actual. The flange on window is not that large, so i respectfully suggest your info is wrong. !/2 ” to 3/4 is what I use. Did I miss something, Thanks, Rick

By: Todd

Todd — Fri, 23 Nov 2012 14:14:11 +0000

You’ll have to make a deeper bird’s mouth and really focus on the roof geometry.

By: dennis

dennis — Thu, 22 Nov 2012 21:42:20 +0000

If i am building an addition when i stand my wall up it is 1 inch higher than the old wall can i make the cornish even by making my new rafters with a longer overhang,