Hi. I currently have a very large balcony - more a roof garden - in the Pacific Northwest which has no covering over it. I've been growing trees, shrubs and perennials there for some years. The garden has a northwest exposure, with hot sun throughout the summer when the sun has reached its zenith. We're having renovations done to fix a leaky building exterior and there is a proposal to cover my balcony with a glass roof. I'm concerned about this because I seem to remember learning at one point that sun beating down through glass is harder on plants than when the sun is shining directly on them. Is this true? If it is, could someone please explain in some detail so I have a good argument when I put forward a counter-proposal to the glass roof idea. Thanks so much!