Be sure to allow for about a 1 inch larger opening than the standard door sizes.
Rough opening for 24 inch french doors.
This will give you room to space the door frame off of the sub floor.
To correctly determine the size of a rough opening for double or french doors measure the size of each door.
Mark all the plates at once.
While a standard door height is 80 finished opening.
The rough opening should be 49 by 82 for a 48 by 80 inch door.
Getting the right size door for the opening helps to make your installation smooth and will eliminate having problems down the road.
So if each door measures 30 inches wide the width of the rough opening should be 62 inches.
This allows for 1 2 inch thick drywall on both sides and at the top 80 inches for the doors and hardware and a 1 to 1 1 2 inch space under the door.
This can be done with an existing door finished opening or a rough opening where you can see the 2x4 s.
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Just add 2 to the width of the actual door size.
There are three simple rules to framing rough openings efficiently.
Measure the opening to your door frame.
As the distance between the king studs.
You should add 2 1 2 to the height of the actual door.
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So if the doors are 24 inches wide leave a 1 4 inch gap between doors and between each door and the jamb.
When calculating the width remember there are three gaps between the doors instead of two plus a jamb on each side of the opening.
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For reference standard interior door widths range from 24 36 finished opening.
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And avoid toenailing when possible.
Rough opening width in 25 5 3 26 0625 406 26 5 8 26 259 rough opening height in 81 5 3 81 6.
Getting the rough opening size right the first time will save you from frustration when installing your doors.
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Framing rough opening sizes are really quite simple.
Door widths vary but an easy way to size the rough opening is to use the door width plus 5 in.
To get the total width multiply the width of each door by 2 and add 2 inches.