When SoftWashing a Roof it is always important to have a ground guide. 1. For safety 2. To ensure that the plants are being saturated fresh water. Never allow a company that shows up with only one employee to be on your roof. It is actually illegal in the state of Florida for a company to not provide a ground guide when performing any work on a roof. Please visit us at https://www.xcellentxteriors.com more information on our services.