Had my roof and gutters treated back in April. It is now December and my roof looks 100X better. I still had some spots of yellowed moss on one of the pitches. I was busy with many other things, I just kept postponing contacting Gregg at Rotban. To my delight, someone was by this week to see the status of the moss on the roof. They left a calling card. Reminded, I called Gregg and to my surprise he said he would be back to do the touch ups. Now that is what I call follow up service!!!