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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

There are several telltale signs that your roof needs to be professionally cleaned. It's best to hire a professional as soon as you notice any indicators of wear to preserve your roof's longevity. Key signs to look for include:

• Moss, Algae, or Plant Growth: Look for moss growth, black streaks (which are often a type of black algae), or any other plant life on your roof's surface.

• Dirt and Grime Buildup: A general layer of dirt and grime can accumulate over time.

• Leaf Buildup: An accumulation of leaves, especially in the gutters, is a clear sign.

• Buildup Under Shingles: Dirt and debris can get trapped under the edges of your shingles.

• Shifting Roof Shingles: While this can indicate other problems, it can also be a sign that cleaning and maintenance are overdue.

• Comparison to Neighbors: If your roof appears significantly dirtier or different from your neighbors' roofs, that’s another sign it may be time for a cleaning.

Roof cleaning isn’t a necessity, but it can drastically improve your home’s curb appeal and even prolong the life of your roof, so it’s often a great investment. It’s especially a good idea if shaded parts of your roof experience algae or moss growth, which can damage the shingles and hold water against them, increasing the risk of a roof leak.

There are several ways to remove snow from your roof: using a snow rake, salting the roof with calcium chloride, using a rope (cautiously), and using heating cables. It’s important to mention that pretty, fluffy, sparkling snow weighs a great deal, and when physically removing snow from a roof, you should be aware of large snow slabs breaking off. These can weigh hundreds of pounds and are a real danger, so be extremely careful anytime you’re doing this type of work.