When there is not enough clearance under the soffit, the awning must mount on the roof. The brackets to the LEFT secure and seal to the roof just above the soffit. 50 year premium Silicone is used to double and triple seal the brackets to the roof. Note that the awning sits several inches above the roof line to allow water, leaves, and snow to wash underneath it into the gutter. Roof mounts are not as obvious as many people think.