why do asphalt shingles streak?
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If you live in a humid area of the country, you've probably seen unsightly dark streaks on asphalt shingle roofs. Though often attributed to an accumulation of dirt, defective shingles, mold, or mildew; the most common culprit is actually a blue-green algae known as Gloeocapsa Magma that is spread by airborne spores.
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Shingles come in various classes of lifetime guarantee. For example, you have the 30-year shingle, the 25-year, the 40-year, and lifetime – the manufacturers manufacture them in those segments. The truth is, a 30-year shingle will not really last 30 years.
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According to the National Weather Service, slight damage can begin when winds reach 45 mph, but this range is considered “non-severe”. These non-severe winds may cause some tree branches to break off and can cause damage to already loose or susceptible shingles.
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Knowing when a roof was installed (and what it's made of) offers insight into how much life it has left. For instance, a typical asphalt shingle roof lasts 20 to 25 years, while a roof installed over an existing layer of shingles should be replaced after 20 years.
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Metal shingles and panels. Metal shingles and panels are noncombustible, but they readily transfer heat. ... Although a roof assembly that has fiberglass-reinforced asphalt shingles can be rated as Class A, these shingles contain combustible material (e.g., asphalt).
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A very basic asphalt shingle, 3-tab style, lasts between 15 and 18 years. If your home has architectural-style asphalt shingles overhead, the durability jumps to between 24 and 30 years.
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Roofing felt can get wet and still maintain its integrity, as long as it is not exposed to the elements for more than a few days. It will break down in sunlight and with large amounts of ongoing moisture. ... If the felt is still wet, it may rip when shingles are installed.
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Shingles May Not Properly Adhere to Wet Surfaces If the sheathing or wood is wet during the time of installation, it can trap moisture inside of your roof, leading to mold, rot, or other severe problems.
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*A note on terminology: Asphalt shingles are also known as and composition shingles (or composite shingles). These are general terms for the same thing. The term “composition” is used because the shingles are a composite product made from either a fiberglass or cellulose mat, asphalt, and mineral granules.
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Asphalt Roofing shingles last 15 to 20 years. Concrete or clay tiles typically last at least 20 years. Wood shingles are good for 10 to 40 years.
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However, the rate at which they “go bad” and the reasons why they “go bad” depends upon whether or not they're on your roof or in storage. Storing your roofing shingles. There are almost always some shingles left over after any roofing project. ... Heat and humidity will damage your shingles.
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GAF Timberline shingles receive their Energy Star rating from a special manufacturing process that enables them to reflect the sun's rays better than other shingle types. This helps to keep attic areas cooler, reducing your energy usage.
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Asphalt shingles generally don't get slippery when wet.
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Standard asphalt shingles feature an adhesive strip that softens during warm weather, especially when the sun's rays hit the roof directly. ... Before new shingles seal down, they can look a little lumpy and uneven, but once the roof gets hot enough, they should soften, flatten and form a permanent seal.
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Answer. Those black streaks on your roof shingles are most likely an algae called gloeocapsa magma, or as it is more commonly referred to, a blue-green or black algae. Algae is a solid deposit of spores and dirt, another form of mold. ... Do NOT pressure wash your roof; one wrong angle and you can damage the shingles.
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VZV spreads through direct contact with fluid from the rash blisters. Most people who develop shingles have only one episode during their lifetime. However, you can get the disease more than once. A person with active shingles can spread the virus when the rash is in the blister-phase.
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A. If anyone has stained/moldy shingles and didn't want to "damage" your shingles by bleaching and removing the gravel with spraying, you can stain your shingles. It works.