In the video above, This Old House expert Tom Silva demonstrates the proper techniques for shingling a roof. However, cedar roofs require regular maintenance to prevent moss, mold, and mildew growth and to ensure they last for a long time. Moreover, a cedar roof is more expensive than an asphalt shingle roof, but its unique aesthetic appeal and longevity may justify the cost. When installing snow guards, be mindful of common errors like improper spacing, which can lead to gaps that allow snow to slide off. Additionally, selecting the appropriate type of snow guard based on your roof’s material and slope is crucial for optimal performance.