A valance can be part of an attractive window treatment.
How to measure for a window valance.
For treatments and valances mounted inside the window frame measure from side to side inside the window frame.
That means that the valance should cover a total width of about 42 to 44 inches once gathered.
Measure around your curtain rod from the wall around the rod to the other wall.
Let s look at an example and apply this calculation.
Measure the width of the window opening from the inside left of the frame to the inside right.
For unlined valances or valances made with light weight fabrics you ll need to go up to 3 to 3 1 2 times fullness.
If you do not have a curtain rod installed measure the width of your existing curtains and add 5 inches.
If you are not using curtains measure the width of the window and add 3 inches.
To ensure your window valance is hung correctly include the rod pocket in the length.
Measure the width of the window then add the return measurement of valance s projection measurement if applicable to your chosen design.
Using a 2 to 2 1 2 times fullness calculation that means that the valance when laid flat needs to be between 84 and 106 inches wide.
Our example window is 40 inches wide including the window frame.
If you ve installed a rod measure from its face to the wall.
A valance that is gathered measure 1 times to double the width of your window.
Measure down from your proposed rod or mounting board location to the spot where you want your valance hem to fall.