Did you ever wonder whats going on under your Solar panels? Like mold? Yes, have you been sneezing, watery eyes, coughing, rashes? Yes the things you thought are Soooooooo wonderful for you may actually be making you sick. and getting your attic moldy in the process. Now, I'm just a old man with an Civil Engineering Degree but where you don't get sunshine and enough air movement, mold will form. Go look at the North side of a house where trees are present, I promise you there is mold. Now, you may not care but you will down the line!