Posts Taged mildew

What Causes Shingle Discolouration On Roofing


If you live in a humid area of the country, you’re probably used to seeing dark streaks on asphalt shingle roofing around your neighbourhood. This discolouration is often blamed on a combination of dirt, defective shingles, or even mold or mildew, but the most common culprit is actually a blue-green algae known as Gloeocapsa Magma that is spread by airborne spores.

Although this algae doesn’t door much real harm to roofing, it doesn’t always look good for the property and can affect the resale value of your home; especially if those viewing it attribute it to something more damaging like mold or mildew. Roofing contractors like ourselves will tell you that whilst algae like this can be removed, it is almost impossible to prevent, given that algae survives through feeding on limestone filler and photosynthesis.

If you are concerned about algae on your roof you can get in touch through our contact page or check out our services page for more information on what we can do to fit your roofing needs!