Gloeocapsa magma or blue-green algae is a common problem for property owners because the spores tend to grow on roofs. But how does blue-algae get there, and what can you do to get rid of it?
Spores on the Roof
Blue-green algae get on the roof surface when its microscopic airborne spores land there. When it rains, moisture gets trapped in small spaces (even around roof nails or flashing seams), providing water for the spores. Over time, the algae grows into a visible mass. Despite what their name suggests, blue-green algae usually show up as dark green, sometimes almost black, growths.
Effects on the Roof
Blue-green algae can present more than just ugly spots on your roof. The growth itself can hold water, potentially leading to moisture-related problems, such as corrosion and even more algal growth. The algae can also make the roof surface slippery, which makes it dangerous to perform roof inspections. Renovation roofing experts recommend removing algal spots before they become large enough to cause these issues.
Getting Rid of Algae
There are several ways to deal with blue-green algae depending on the severity and the type of roof. Minor cases can be rinsed off with a pressure washer, but it could erode the roof surface. A gentle spray of water mixed with anti-algae chemicals like bleach will work for most surfaces, but you have to take care not to let the bleach harm the plants below the roof.
Preventing Further Growth
Residential and commercial roofing experts recommend taking the necessary precautions to prevent further blue-green algae growths. Copper or GI strips can be installed just below the ridges to kill off the spores before they have a chance to grow. Switching to algae-resistant roofing materials is more expensive, but they provide better results.
Keep your roof algae-free with help from our team. Ritco Group, Inc. provides roofing services in Murfreesboro and Brentwood, TN. Give us a call at (931) 381-0175 or (931) 215-9850. You can also fill out our contact form to request a quote.