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I installed 72 inch French doors into a 71 inch rough opening without realizing and now they are very hard to open and close and I can't adjust enough to make it work. What would be the easiest fix?
 

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Can not fit a qt. of Jello in a pint jar.
If the rough open was not 2" wider and at least 1" taller then the door size the framing should have been altered before the door went in.
 

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Plenty of videos on youtube.I would go to the manufacturers website and watch their installation video. If you have a 72" W door that is the size of the 2 doors together excluding the jamb which is 3/4" each side So 72" + 3/4 X2 for jamb + 1/2" clearance to plumb and shim.I like to put some sort of a rubber membrane at the threshold and up both sides of the RO and don't forget to use a sill pan.You can google it.
If you did get the door in your opening the reason it is not opening and closing properly is that you had no room left to plumb and shim the door so it is out of square.Take a framing square and put it in a corner of the door FRAME and check for square.Set a 4' level on the head and see if it's level.
Time is short today and I have a hard time helping people who can't simply look up the manufacturers installation instructions and videos.No waiting and they are dealing straight with the source.I have never seen any installation instructions for windows or doors that did not explain and spec the RO size.
 

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Plenty of videos on youtube.I would go to the manufacturers website and watch their installation video. If you have a 72" W door that is the size of the 2 doors together excluding the jamb which is 3/4" each side So 72" + 3/4 X2 for jamb + 1/2" clearance to plumb and shim.I like to put some sort of a rubber membrane at the threshold and up both sides of the RO and don't forget to use a sill pan.You can google it.
If you did get the door in your opening the reason it is not opening and closing properly is that you had no room left to plumb and shim the door so it is out of square.Take a framing square and put it in a corner of the door FRAME and check for square.Set a 4' level on the head and see if it's level.
Time is short today and I have a hard time helping people who can't simply look up the manufacturers installation instructions and videos.No waiting and they are dealing straight with the source.I have never seen any installation instructions for windows or doors that did not explain and spec the RO size.
Thanks for your informative reply.

There are hundreds, possibly millions of DIY'ers that do not know this and many that do refer to install instructions have a problem interpreting them but I have to give them credit for trying.

It seems as if we've lost any association with the trades in our school systems and reading a print is impossible for many.
 

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My apologies I thought this was a forum for do it yourselfers looking for help and advice. Thanks anyway!
I thought I did post some helpful advice.It was free and I did not realize I owed you anything for joining the site.
A 72 " prehung door will measure 73 1/2" from outside of jamb to outside of jamb.I still fail to see how you installed it in a 71" RO.
Another thing I don't understand is how you expect the pros on this forum to take their valuable time to answer your questions when you won't put forth any effort yourself such as posting a picture or giving further details.
 

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The solution is pretty simple in concept but an PIA in practice. Remove the door and hopefully it hasn't been damaged by squeezing into too small an opening . Remover the current rough in framing, reframe the rough opening to the specs in the door instructions, rehang the door, replace the drywall inside that had to be cut away, repair and our replace the outside siding that had to be cut away, redo the interior and exterior trim and repaint. Or measure the current opening and order a door to be made to the size you need. Sell the current door. Those are really the only options. Reading the fine manual is always a good place to start
 
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