Originally Posted by CL&T
That roof is way to far gone to even think about cleaning it. And those trees need to be cut back to prevent it from happening again.
It is always best to keep things off the roof,no matter how bad of a shape its in... those leaves are going to rot the roof boards and rafters by holding moisture in, under and through the shingles... protection from the sun, as much as possible is a good thing,,, so cutting back applies only to branches rubbing on the roof...
The best way to prevent this from happening again,,, is annual maintenance...