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From the Rooftop Blog

Metropolitan Roof's From The Rooftop Blog keeps you up to speed on how to choose and maintain the best roof for your home or business.


Filtering by Tag: moss prevention

5 Ways to Prevent Moss on Your Roof

Kathleen Finn

We let you know why to get rid of moss and how! Now here's the skinny on how to prevent the moss from growing on your roof in the first place.

1.   The best way to prevent moss growth on your roof is to start with algae resistant shingles, which contain 10% copper granules. Copper prevents algal growth.

2.   Place copper or zinc flashing along each side of the roof, just below the ridge cap – 2-4” of metal should be visible on the roof. Water must be able to run over the strip in order to create an alkaline environment, which kills the moss.

3.    Maintain your roof by keeping leaves and other debris from accumulating on your roof and gutters. Moss proliferates in damp, wet environments.

4.    Maintain the area around your roof for the same reason. Keep tree limbs clear of your roof, so the roof gets plenty of sunlight and air circulation.

5.    Apply moss-prevention solutions to your shingles before moss gets a chance to set up shop. Use prior to the wet winter months and again, in early spring.

If you want to start fresh and it's time for a new roof, schedule a consultation with our sales team.

5 Reasons to Keep Moss Off Your Roof

Kathleen Finn

1. It doesn’t look good. The blue-green algae (gloeocapsa magma) makes a mess of your roof with unsightly splotches and lumps. You spent a lot of money on your roof, so don’t let the green (gray) monster take over.

2. It blocks the sun. Too much moss doesn’t allow the roof to properly reflect the sun’s rays, therefore the cost to cool your house in the hot summer months, increases.

3. It blocks gutters and drainage. Moss is most problematic when it starts to block gutters, outlets and other drainage points.

4. It blocks water flow. When moss builds up, it impedes the natural action of water to run straight off the roof. It soaks up water, which then lies over the tiles for long periods of time. When wet, moss can weigh five times as much as when dry.

5. It holds in moisture, which can lead to rot, mold and mildew. Keep your roof dry, keep your house dry.

* Next up, we will tell you how to remove that intractable moss.