5 x research source you will need to add 1 2 of plywood between the 2x4 s to get the right wall thickness of 3 1 2.
How to build a door french frame.
To make the door header the top of the door frame cut two 2x4s to the same length as the width of the original opening and nail them securely together.
A door jamb is 1 inch thick has an additional 1 4 inch gap.
The jamb frame surrounding the doors themselves consist of side jambs and a top or head jamb across the top.
When building a door jamb to fit a standard wall with a two by four frame and 1 2 inch drywall on each side the width of the jamb board typically is 4 9 16 inches.
If you re not using premade jamb material or if your walls are a nonstandard thickness you can buy 5 or 6 inch wide lumber and rip cut it to the width of the wall using a table saw.
After you find the width of the frame then calculate the height of the door frame.
What projects should we make next.
Jamb material typically is 3 4 to 1 1 4 inches thick.
Add those measurements to the size of both doors and add an additional 1 1 4 inch to obtain the final dimensions.
Let us know in the comments.
I love the arts crafts style furniture so i picked some simple doors to practice so one day i can tackle my front door at home.
Building frame panel french doors.
In this video i make a set of custom frame panel french doors for my shop.
Wayne lennox cottage life s trusted handyman shows us how to build a custom door frame.
Framing for a french door is similar to framing for a single door except there are two doors and each door will be hung one on each side of the opening.