Roofing granules are made from crushed stone and minerals. They also have copper in the granules to keep algae from growing for some time. It is important to note that granule loss is a normal part of roofing wear and tear. As the roof ages, some of these granules come loose from the asphalt layer.
Causes of Granule Loss. Granule loss is a regular occurrence, but it is a cause for concern when you spot more granule loss than usual. Here are some of the causes of granule loss:. Your Shingles are Defective. While not common, this does still occur. If there is a defect in the shingle, the most common symptom will be blistering.
Blistering occurs when pockets of moisture from inside the asphalt layer and as the moisture expands and contracts if forms the blisters. Your Roof is Old. As your roof ages and endures a series of weather events, it will naturally begin to lose granules.
The bond holding the embedded granules gradually begins to degrade and releases the granules. This makes the shingle more acceptable to UV damage, which leads to brittleness, cracking. If your roof is more than 10 years old, you could require a roof replacement. You Have Storm Damage. Depending on the level of granule loss and age of your roof, you may be able to replace the damaged shingles without having to get a new roof.
Keeping track of what is happening on your roof can be difficult — unless you are very tall or have a drone. Under certain circumstances, the recommended frequency of Read more. While installing a new roof is no small investment, replacing your roof is a remodeling project that not only adds curb appeal of your home, but also can increase its value. Replacing your roof is a significant home improvement that involves a contractor doing much more than just nailing down shingles or screwing in metal panels.
Though an experienced roofing professional will be available to answer Read more. Getting ready to sell your home? One of the most important aspects to consider is what in your house needs attention or replacing before you sell.
Granules were first added to shingles in the early s and were primarily used for durability. Ceramic granules came along several decades later and offered numerous color options not previously available. Years l ater , the source material for the granules was modified with a focus on also reducing susceptibility to ultraviolet light as well as inhibiting organic algae growth. I found this information in multiple places, most notably in this historical information from the U.
Forestry Service. Granules are a critical ingredient to asphalt shingles and their ability to withstand the harsh weather conditions that they endure year after year, not only from the sun but from rain, hail, and snow throughout the winter. Much more! You have heard of 3M, right? Well, they also are a leading manufacturer for those granules on your shingles. With their entrance into the asphalt granule marketplace, the company put its reputation for ingenuity to work and in was granted a patent for a special algae-resistant granule.
Their system for these algae-resistant granules later earned the Scotchguard brand and in , the company began marketing 3M Cool Roofing Granules source. You can read more about these technologies on the 3M website. Who knew? Another result of weathering is granule loss. Granules may be lost for a number of reasons.
In determining the cause, it will help to look at the roof from both near and far. Look at it from the ground to check for overall patterns of loss. Examine its surface closely to see details. When shingles are manufactured, in addition to granules embedded in the asphalt, some granules interlock with embedded granules but are not embedded themselves. Many of these granules come loose during packaging, shipping and installation, but many are still attached after installation is complete.
These will likely be removed by runoff during storms and deposited into the gutters. The sediment in this gutter is made up of granules mixed with dirt. Long-term, uniform granule loss is not considered functional damage by insurance companies. Granule loss which is uniform across the roof is usually a result of normal weathering. Over time, the bond between the granules and asphalt deteriorates, and granules will be loosened and carried away by runoff.
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