I have a large modern home in Toronto, Canada. The back of my house faces south and is 90 % windows. ( 10' by 10' windows). On sunny days the solar heat transfer is excessive. Current windows are low e. I have installed 3M film, but not much help. In fact, now that solar film is installed, I am experincing window cracking. Is there an engineered window system that will block most of the solar energy ? I prefer to stay away from mirrowed windows.