Hey first time poster here. So I bought a 70s house and have been working hard at getting the place renovated. The upstairs bathroom was a tub/shower setup with a window. When I replaced the rest of the house windows I ordered a temp glass window same size for this area which is now going to be a walk in shower. Is this a mistake to install? I’m installing a rain shower head from the ceiling so there will be lots of spray. I’m laying concrete board and rolling on Red Guard. Would like to know your expert thoughts, thanks! Photo attached…btw window was just placed in with 2 screws overnight…peel n stick is yet to happen.