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What are Asphalt Shingles Made Of?

Asphalt shingles are everywhere, but what are they actually made of?
Asphalt shingles are everywhere, but what are they actually made of?

The dominant residential roofing choice, not only in the United States but in many countries around the world, is asphalt shingles. Irrespective of the style or color they are all manufactured in much the same way with the same type of raw materials.

During the manufacturing process a continuous foundation sheet is used on which the materials are applied.

The Materials


Glass fibers of a specific size make up the thin fiberglass mats which, in turn, are bonded together using stable resins and binders. These are then used for reinforcing asphalt roofing shingles, as well as providing the roofing material with weather protection, greater fire resistance and a longer lifespan.


Asphalt provides the main water-resistant element and binds the granules to the shingle. The asphalt used is similar to road asphalt, in that it is an end product of oil-refining, however it undergoes an oxidation process resulting in a higher degree of toughness allowing it to stand up to the elements. During this process air is precisely blown through the hot asphalt increasing its viscosity. To meet the standards for fire resistance, a fine mineral powder is mixed with the asphalt. This also provides better weather resistance.


The most visible feature of asphalt roofing shingles are the stone granules, which are processed by ceramic firing, to create a variety of colors. They not only give the roof style and beauty, but also help to reflect the sun’s rays.

Our experienced team at Asset Roofing in Snohomish WA are here to bring you the best roofing solutions. Whatever your roofing preference, be it shingles or metal roofing, you can count on us. Contact us today for a free quote.