The degreasers in today’s laundry detergents will actually eat through your roofing and cause numerous leaks in a matter of days. This used to be an easy, effective method for controlling moss and algae, but because of environmental concerns, laundry detergent no longer contains the fungi-killing phosphates it used to. We can only suggest using products that are specifically designed to control moss on roofing products, and the one we recommend our customers use is Moss Out!