Does anyone have a north facing room with skylights? If so, does it still get very hot in thr summer even if there's no direct sun on the roof window? Would you recommend the special solar glass that keeps the heat/ glare out a bit. I'm just reluctant to do this if it means that it will be more dingey for the rest of the year, and also colder in the winter too presumably? We have to decide whether to go for clear glass or solar glass.