Late summer is when homeowners actually look up. The light is different, the yard work is done, and the streaks on the roof are suddenly obvious. If that is where you are right now, here is what you are looking at. Moss, algae, and lichen all want to live on your roof If your roof looks blotchy, streaked, or dark in patches, something is growing on it. Algae, moss, and lichens all like to live on a roof. This is not dirt that rain will eventually rinse away, because it is liv