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A metal roof will last for an average of around 50 years—usually between 40 and 75 years—which is about double the lifespan of an asphalt roof—between 15 and 30 years or 25 years on average. Installing a metal roof is usually more expensive than an asphalt roof, with an average cost of $11,400 compared to the $9,200 for an asphalt roof. However, given that a metal roof costs about 20% more and lasts twice as long, it’s typically well worth the investment and should save you money in the long run.

Moss grows in dark areas of roofs, including in corners and gutters. If left alone, it can grow under roofing and cause permanent damage. Here’s how to remove moss from metal roofs: 

• Soak the moss to soften it

• Scrub it away with a soft-bristled brush, or pick it off with your hands (be sure to wear gloves)

• Use a moss remover that’s compatible with metal roofing, following the manufacturer’s directions

• Remove dead moss and rinse the roof thoroughly

• Prevent future moss growth by trimming branches, cleaning gutters, and attaching zinc strips to moss-prone areas

The cost to replace the chimney crown or top is about $1,550 on average. The range varies widely depending on the size of the chimney, the materials used, accessibility, and the extent of the damage. If you suspect a problem with your chimney top, call a professional masonry contractor for an inspection. 

Asphalt shingle roofs are more likely to leak than metal roofs because they are more prone to uplift and damage from extreme weather, moss growth, and ice dams. Asphalt shingles also lose shingle grit over time, which decreases their waterproofing qualities. Metal is a more resilient material that will stand up better to strong winds and heavy precipitation, ultimately leading to a lower risk of leaking. As such, metal roofs add to home value with a higher ROI than asphalt roofs in most cases.