what you need to know about replacing your roof

what you need to know about replacing your roof

Regular Removal Of Moss Reduces Roof Repairs

by Vanessa Lord

No homeowner likes to see it, but moss is a common problem on roofs throughout the U.S. Moss growth is particularly noticeable on the shady parts of roofs. With its shallow system of rhizoids, or small root-like structures, moss can hold moisture against your roof and do damage to it over time.

A new composition roof costs an average of $18,800, so it makes sense to keep moss at bay and get as much life out of your roof as possible.

Typically, moss removal is done physically by scraping it off or chemically by applying a zinc or copper based product. It should be done every year to every 3-4 years, depending on the type of removal system you choose.

Different Types of Chemical Moss Killers

You or your roofer can use a moss killer product to inhibit moss growth and make sure that moss does not re-grow quickly. Know the risks of using any chemical on or around your home, as some are toxic to plants and animals. There are a few commonly used types of products:

  • Zinc strips. These stop the growth of moss along and around the zinc. They last about a year.
  • Potassium salts of fatty acids. This is a nontoxic method of killing roof moss; you spray it over the roof. Its effectiveness can depend on the climate.
  • Zinc sulfate. This is a powder that is sprinkled over the roof or dissolved in water and sprayed on. It can harm plants so cover them up before application.
  • Zinc chloride. Apply this as a powder or spray in the spring or fall. It can control moss for more than a year.
  • Zinc-copper sulfate mix. Apply as a powder or spray whenever it's not raining. It can be corrosive so make sure you're not using around copper fixtures.
  • Bleach. This can be sprayed on the roof, but many roofing experts think it's too harsh for regular use. It can be toxic to plants so they'll need to be covered.

Other Ways to Keep Moss Away

Besides spraying your roof with a moss killing product and applying zinc strips to retard moss growth, there a few other things you can do to minimize moss.

  • Make sure that limbs overhanging the roof are trimmed to minimize the shady overhang that can encourage moss growth. Often your roofers can do this for you.
  • Keep gutters cleaned so there's never any standing water on your roof.
  • Sweep or clean debris off the roof at least once or twice a year.

If you're not interested in crawling around your roof on your own, you can hire a roofing company, such as HomeTowne Roofing, to do regular maintenance on your roof, which typically includes debris removal and checks for moss once or twice a year.


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what you need to know about replacing your roof

Are you waiting for your roof to be replaced so that you can change the appearance of your home? If so, you are probably spending some time doing research about the different options in roofing that you have. Do you want to go with standard asphalt shingles, dimensional shingles, metal roofing or something else? What type of roofing will last the longest while looking great? Will one type of roofing increase the value of your home more than another? Read through my site to find the answers to many of the questions that you have about replacing the roof on your home.