Atlanta Roofing: Article About All About Asphalt Shingles
For more than 100 years, asphalt shingles have been one of the most popular choices for roofing in the United States. Due to their durability and affordability, these shingles can be found on roofs in many neighborhoods, and they are a common selection of homeowners when they hire an Atlanta roofing company to install, repair or replace a roof. Understanding what these shingles are and how they work helps to explain why they are long lasting and a preferred choice for roofing.
All asphalt shingles are made of three basic components. First, there is the core of the shingle, which is typically made of an organic material such as paper or an inorganic substance such as fiberglass. This core is laid out like a mat, and asphalt is infused into it to create a waterproof surface. Then, a layer of mineral granules is placed on top of the asphalt. These granules help the shingles last longer, and granules block out ultraviolet rays from the sun that can cause the shingles to deteriorate.
Asphalt shingles are arranged to form the top layer of a roof. In most cases, they are the third layer of the roof. The first layer is known as the roof deck, which is plywood or oriented strand board that is attached to the building's rafters.
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On top of this deck, roofers lay an underlayment made of felt, and the shingles are placed on top of the underlayment. Should any moisture leak through the shingles, the underlayment provides an additional level of protection to help keep water from leaking into the building. Some roofs may also include a layer of reflective panels on top of the roof decking to reflect heat away from the roof and keep the attic cool.
Asphalt shingles are laid in an overlapping manner so that almost every shingle on a roof is covered in part by another shingle. This helps water to run off the roof more quickly and not pool on the roof where it can cause additional damage. Shingles are held down with roofing nails.
Despite their durability, asphalt shingles eventually crack as they age. When that happens, a shingle will need replacement, if not the entire roof. Expert roofers can handle this repair or replacement, and they can also tell when a roof needs to be fixed. Homeowners should know that persistent leaks from their roof are often an indication that the roof needs replacement or repair.