How is Roofing Recycling done?
The process of roofing recycling can vary depending on the type of roofing material and the recycling facility, but generally involves the collection, transportation, and processing of the materials. Here is a step-by-step guide on how it is done.
1. Collecting Roofing Shingles
The first step in roofing recycling is to collect the used shingles from the roofing project. This can involve setting up a designated area for collecting roofing shingles, separating the different types of materials, and keeping the them dry to prevent damage. Once the shingles have been collected, they can be transported to the recycling facility.
2. Sorting and Removing Contaminants
When the roofing shingle arrives at the recycling facility, it is sorted and inspected for contaminants such as nails, screws, or other debris. These contaminants must be removed before the materials can be processed.
After the initial sorting process, magnets are used to remove any metal contaminants. Then, air separators are used to remove lighter contaminants, such as wood or insulation fibers, from the roofing shingle. These separators use air flow to separate the lighter contaminants from the heavier roofing material.
Once the roofing shingle has been sorted and any contaminants have been removed, the materials are ground up into smaller pieces using a grinding machine. This process can help to break down the materials and remove any remaining contaminants.
Generally, the roofing shingle is ground down into small pieces ranging from pea-sized to about 2 inches in diameter. Some manufacturers may require the recycled materials to be ground to a specific size, while others may be able to use a range of sizes.
After the roofing materials have been ground up, they are sized to meet the specific requirements of the manufacturer. This can involve sorting the materials by size or using a screening process to remove any oversized or undersized pieces.
For asphalt shingle roofing, the size of the pieces resulting from primary grinding can vary based on the equipment used, with some yielding 2″ or 3″-minus sizes. Additional secondary grinding may be necessary to produce smaller pieces as required, such as 3/4″-minus for aggregate base or 1/2″-minus or 1/4″-minus for asphalt pavement.
The graded roofing materials are then inspected and graded based on their quality. Materials that meet the manufacturer’s requirements for quality and consistency are used in new products, while materials that do not meet these standards may be further processed or disposed of.
6. Transporting to Manufacturers
Once the roofing materials have been processed and graded, they are transported to manufacturers who use them to create new products. The materials can be used to create a variety of new products, such as roofing shingles, road pavement, or other construction materials.