What is an Atlas Chalet shingle?
Atlas Chalet, Atlas Alpine, Certainteed Horizon, Certainteed Stratford, and Owens Corning Prominence are all the same type of defective and discontinued shingle from different manufacturers. These shingles are additive granule, 3 Tab Shingles that were designed to mimic true laminate, dimensional architectural shingles. These shingles were in fact sold as Architectural shingles and were sold as an upgrade to basic 20 and 25 year warranted, 60 mph wind rated shingles. They were sold in the state of Georgia since before 1999 through 2010 and carried a 25 year warranty and an 80 mph wind resistance rating.
These shingles were manufactured the same as any 3 Tab with one important distinction. They start manufacturing process with the fiberglass mat most non-organic shingles have at the core of them. Next, they cover the shingles in asphalt. Next, while the asphalt is still hot, they cover the shingles in ground down rocks (granules). These shingles differ from normal 3 Tab shingles in this final step. The shingles then get another layer of asphalt and granules in varying places and of varying sizes. This causes many issues that will be described in depth later on.
These shingles can be difficult to identify to the untrained eye, but they are denoted by their shadow lines near the top of the shingles, the vertical lines separating each of the three tabs of the shingles, and the dimensional patches of added granules designed to give the shingles the depth of laminate architectural shingles. However, depending on how degraded the shingles are, they can appear to be a normal 3 Tab shingle or a true laminate Architectural shingle. The professionals at Blackstone Roofing have been extensively trained on how to identify these shingles and what to do with them for the purpose of inspections and the insurance process.