I live in the forest and we routinely need to blow off the roof. You aren't supposed to sweep it because it degrades the shingles (according to our roofer). So

I live in the forest and we routinely need to blow off the roof. You aren't supposed to sweep it because it degrades the shingles (according to our roofer). So, we have an electric one for that, and for various other tasks, like clearing our steep driveway of debris that makes it difficult to receive deliveries or get our cars up. Blowing takes 30 seconds, where sweeping would take 5 minutes.