u/Alex6095

Looking for an app that would let me specify outer dimensions (2d) and then mark locations for hole centers and diameters, stud centers, etc. Are there any apps that make this easy?

I have a window flush with interior studs inside a shower. My original idea was to frame it out with PVC trim flush with hardibacker, then lap the joint with schluter band, mortar on the hardi side, and kerdi fix on the PVC side. Everything I've read says don't tile over PVC, so what should I do instead to ensure a finished look for the thickness of the hardibacker?