Just add 2 to the width of the actual door size.
How to measure a exterior french door frame.
Measuring the dimensions of french doors in new buildings.
Record the height and width of the door frame space.
Measure from the inside edge of the trim on one side to the inside edge of the trim on the other side to get your jamb width if there s trim installed or simply measure the jamb if it s unadorned.
Sealing will be much more important with exterior doors.
Measure the height of the door frame from the bottom of the.
How to frame a french door step 1 the most complex part of the task is measuring the doors and calculating the width of the opening for the set of double doors.
Getting the rough opening size right the first time will save you from frustration when installing your doors.
This will help ensure that you select the exact right replacement door.
Dimensions taken from outside the frame.
First the height of the door reveal the wall opening needs to be measured deducting 20 millimetres afterwards.
At the top middle and bottom of the frame and use the smallest measurement.
When calculating the width remember there are three gaps between the doors instead of two plus a jamb on each side of the opening.
Use the smallest figure as your measurement.
Remove the casing trim on one side of the door interior side for exterior doors using a flat pry bar.
This dimension is needed to replace the door and the frame.
Measure from the floor up and add 1 inch for the bottom and 2 inches for the top jamb.
Whether you re buying a pre hung french door or constructing the frame from scratch accurate measurements of the rough opening are.
As for how to measure a door frame.
How to measure a rough opening for replacing french doors.
With new buildings the fact that there are no doors or windows installed makes it easier to determine the measurements for the installation of a french door.
Just to be safe measure the area where your door will go too.
Measure the width of the door frame from the outside of the jamb on one side to the outside of the jamb on the other side.
Framing rough opening sizes are really quite simple.
Net frame size may vary for each manufacture most of the manufacturers offer to trim the unit from the height and width but within a limit.
Add those measurements to the size of both doors and add an additional 1 1 4 inch to obtain the final dimensions.
The framing process for interior and exterior.
You should add 2 1 2 to the height of the actual door.
Measure in three places.
Exterior installing exterior french doors is a little more complicated.
Measure the width of the door in 3 locations.
In general you should be able to get by following the same instructions above.
This will give you room to space the door frame off of the sub.
After you find the width of the frame then calculate the height of the door frame.
Stand inside the open door facing the jamb.
Albeit with these important caveats.