[Jamesonc]

Does the Kerdi board sit above or in front of shower pan flange? The first photo is above, second is in front.

 

[XSleeper]

Above. See video at 1:25.

 

[Jamesonc]

I wanted to mention that I had seen this video, but I appreciate the fact very much that you researched this, found the video, and even told me at exactly what time in the video it's discussed. Thank you.

 

[McGillicuddy]

It can be installed either way although when I do my bathroom I will be going over the flange as I think that provides the best protection. You can notch the back of the kerdi so it doesn't bow out at the flange.
https://www.schluter.com/schluter-us/en_US/faq/kerdiboard-connect-to-bathtub