Analyzing the Failures of the Old Shingles

What happens here

Josh and Luke examine the old shingles, revealing a critical flaw: the adhesive strip, meant to seal the shingles together, is located on the top surface rather than the underside. This means the shingles were not properly sealed down, with only the nails providing structural integrity. Luke notes that these shingles likely had a very low wind resistance (estimated 60 mph), far below modern standards (130 mph). This improper sealing allowed high winds to easily lift and tear off shingles, as experienced by Josh during a recent storm. Luke demonstrates how brittle the material has become, easily breaking off sections.

Goal: Understand why the old shingles failed due to poor design and material quality.