Green roofs are trending these days. However, there is one thing worth noting: green roofs should be designed that way. If you’re waxing poetic as you gaze up at your own green roof, one that has become green over time as the result of moss and algae growth, it’s time to halt the Irish soundtrack and check back into reality.
Yes, That Probably IS Moss Up On Your Roof
Moss and algae may lend a lovely green hue to your roof, and give your home a romantic, cottage-like look but, in fact, they’re bad news. Moss is a sign that:
- The roof is laden with moisture.
- Organic materials are being consumed for its growing pleasure.
- Significant structural damage might be taking place right under (or over) your nose.
Contrary to what you may have learned, moss doesn’t just grow on the “northern” side of things. In fact, moss grows:
- Where it’s wet. Moss likes a wet and shady environment. If things get too dry, moss will go dormant or die off. However, moss also helps to keep things wet, so where moss grows, moisture damage or rot can ensue. In the case of your roof, this can lead to moisture penetration that seeps into your attic and interior wall spaces.
- Where it’s shady. Moss isn’t a huge fan of direct sunlight. A little light is fine but it prefers more dappled or diffused light. This is why it tends to grow on areas of your roof that are shadowed by a mature tree or neighboring buildings.
- Where it’s cool. We all have our “preferred” temperatures, and moss is no exception. Typically, moss likes to grow in temperatures between about 20° F (although they prefer it a little warmer) and 70° F. This is why moss growth on roofs tends to peak during later winter and spring months, or into a cooler summer.
Remove Moss From Your Roof as Soon as Possible
Moss removal is key to protecting the health of your roof and your home. It’s feeding on the organic matter found on your roof, namely your shingles. Thus, over time, the moss can actually rot away your roofing materials, which leads to expensive roof repairs and replacement.
You can remove moss on your own, by climbing on the roof and scraping it away. Then, you can spray a 50:50 mix of water and bleach to keep the spores from growing back. Don’t use a pressure washer for this as it can damage the shingles and/or spray water in between roofing materials, which can also result in water damage.
Keep in mind that a roof with moss will be wet and slick. There’s a good chance algae and mold are also present, which makes for even more slippery conditions. Always make safety your first priority.
If mold growth seems excessive, it may be worth it to hire a professional. Proman WC has provided professional roof moss removal services to our bay area clients for 10-years and counting. We’re happy to come out and take a look and will provide a free, onsite quote. Contact us today by calling 425-908-9121 or 510-478-4880. You can also email us at firstname.lastname@example.org.