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 Summary of 3rd Asphalt Shingles Recycling ForumAs of 12-18-2007

The growing housing stock in the U.S. continues to drive growth in the re-roofing segment

On average, residential roofs are replaced every 15 years

As houses get older, more and more roofs will need to be replaced

Long history of shingles recycling R&D:

Demonstration project with Genstar Stone; Baltimore, MD

Oversize RAS material lead to bad road installations. Bad test road installations lead to State DOT cynical views and challenging test data.

Today, GAF–ELK have 12 Asphalt Shingle Recycling Partners:

13 manufacturing locations

160,000 tons of manufacturer’s shingle scrap recycled annually

Technology advancements have resulted in lower processing costs and higher quality RAS product

More attractive economics today

Tear-off shingles recycling requires additional R&D:

Separation of shingles from other debris: Who is responsible? What is the most cost-effective strategy?

What are the barriers and for state approval of tear-off RAS – derived HMA mix designs?

What are the concerns of the HMA producers? (Note that shingles manufacturing over the years has gone through material and specification changes. There have been various formulations including changes in asphalt content.)

Frequency of testing and cost of testing for contaminants in tear-off shingles? (Note: some tear-off shingles may have been manufactured decades ago.)

Husnu Kalkanoglu, CertainTeed Corporation “Shingle Recycling” 610-641-6217, Husnu.M.Kalakanoglu@saint-gobain.com

Annual plant waste is ~1 million tons

Cost incentives encourage post industrial recycling

Intellectual property field is active

17 patents and patent applications identified that referenced products made from recycled shingles (1978-2007)

Separately 26 patents and patent applications made claims for methods to recycle shingles (1978-2007)

Important to work together with:

Federal & State DOT’s

Roofing Manufacturers’

Roofing Contractors


Robert P. Grefe, P.E., Wisconsin Department of Natural Resources “Wisconsin Regulatory Experience with Asphalt Shingle Recycling” 608-266-2178, Robert.Grefe@wisconsin.gov

Several project proposals were received from companies in 2007 on the use of tear-off shingles

Project road applications for tear-off shingles include:

Cold mix

Dust control

Subbase fill for paved roads and parking lots

HMA applications

QA/QC & Recordkeeping

DNR has a couple mechanisms for regulation

Processing facility approval or low hazard waste grant of exemption

Different authorities, but can require the same items

Primary emphasis on sorting & visual examination to achieve clean shingles

Processors need best management practices guide for haulers/roofers

Annual reporting for basic statistics and information

 Prepared by ShingleRecycling.org and DKAPage 6 of 11

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