If you notice moss or mold on your cedar shake roof, it's crucial to take action immediately. Moss and mold can cause severe damage to your roof if left untreated. A roofing professional can inspect your roof and determine the best course of action to remove the moss or mold. Sometimes, power washing the roof can remove the moss or mold. In other cases, more intensive cleaning may be necessary. A roofing professional will be able to advise you on the best course of action to take to protect your roof.