I'm just completing a house build I did almost entirely myself and this door was the single most frustrating experience of the entire project. There is almost no flexibility in terms of installation and the instructions are almost impossible to comprehend. In the end I managed to make something work but I have no confidence in it's longevity and in it's waterproofing ability. I provide almost no reviews on things but feel so strongly about this that I had to say something. Please save yourself the headache and buy another product.