You can add interfacing to your strips before you insert them into the belt loop binder. Some people like to insert the interfacing into the attachment at the same time as they insert the fabric. I find it easier to fuse the interfacing onto the strip before I insert it into the attachment. I don't usually use interfacing in my strips, but I did try it when I was making the ribbon candy tree ornaments featured in one of my blog posts. Good luck with your project. Happy Serging!
