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Removing Moss From Your Shingle Roof

moss on roof

If you live in a humid or rainy climate, chances are you’ve had to deal with moss and algae on your roof, from time to time.  Sure, it doesn’t seem very harmful at first, but actually, moss can cause significant damage to your shingles in just a few years.  While it’s true that there are many ways to remove moss, it’s extremely important to keep a watchful eye, so that it doesn’t reappear and pose a further threat to your roof.

Initial Inspection and Brush Removal

  1. Climb up to your roof with a tall latter, and inspect it for moss formation: It tends to start on the lower edge of a shingle, growing upwards, and feeding on any nutrients it can find.  If you plan to go on your roof, remember to take all necessary safety precautions: wear a hard hat, a harness, and always walk forwards, never backwards.
  2. Scrape off the moss where it has taken root, using a stiff brush: Be careful on the ladder and try not to scrape off any of the existing roofing.
  3. Spray the excess moss: Using your garden hose, spray the brushed bits of moss off of the roof.  In most cases, it is best to do this while on top of the roof, spraying downward.  If you spray upward, against the lay of the shingles, it might loosen them.

For Severe Moss Cases

When moss and algae become a serious problem, the usual remedy is an alkaline-based moss cleaner.  When using this, make sure that the product is friendly to the surrounding plant-life, and that it won’t run-off into your gutters.

A Home Remedy

  1. Pour hydrogen peroxide OR white vinegar into a spray container
  2. Spray it on your roof, where ever moss is present
  3. Give the mixture time to absorb into the moss (do not hose it off)
  4. Hose the moss off the roof, once it turns brown and crusty

The Zinc Option

You can purchase zinc strips at your local hardware store, which are extremely effective in killing moss.  Nail the strips into the roof, starting at the peak, and apply them every few feet.  When it rains, the zinc will seep out of the strips, flow into the moss, and kill it.

Posted by MWalter Roofing Company of Chicago