There are many types of asphalt shingles to choose from, yet the manufacturing process is basically the same. Here’s how asphalt shingles are typically made.
Backing Material
There are two kinds of backing material used for asphalt shingle manufacture: traditional or “organic” cellulose made from recycled paper, and the more common fiberglass shingle. The manufacturing process begins with spools of material being fed into several rollers. Some of these rollers are raised several feet high to allow as much slack as possible. This prevents the flow from stopping. As the spool winds down, a new spool is spliced with the one ahead of it.
Asphalt and Granules
The backing material is then passed through hot asphalt, soaking it through, which gives the asphalt shingles its water-resistant properties. Once it’s cooled, the backing material is then soaked with a second coating of an asphalt and powdered limestone mixture, which gives it flexibility.
While still wet, ceramic granules are applied to the now asphalt-soaked backing material. Different nozzles release different granule colors as needed. This creates the various colors that people see when the roof is installed. Depending on the product, these granules may contain additional “ingredients”, such as copper, which prevents algae growth. Granules that do not stick are collected and put back into the system.
Adhesives, Trimming and Packaging
Polyurethane strips and powdered stone are applied to the back surface to stop sheets from sticking. Strips of heat-activated adhesives are then added: these are reinforcing strips that improve roof resistance against high winds.
The sheets of material are then sent to the cutting station, where it will be finally cut into shingle mats with different profiles depending on the product being manufactured at the time. Traditional three-tab shingles will, for example, have a single layer of material cut into regular patterns. Laminate or “architectural” shingles, on the other hand, may have two layers of material, with the top mat cut to a different profile. The shingles are mechanically counted, bundled and packaged, ready for delivery.
Choose Paramount Professional Roofing for roof repair needs. Give us a call at (860) 393-4033, or fill out our contact form to schedule an appointment.
