List of Shingle Damages that Cause Suspicion of Intentional Shingle Damage

Posted by in Roof, Shingles | November 18, 2013

It takes a body of evidence to determine whether or not the shingles have been intentionally damaged to mimic wind damage.  Following are many of the characteristics or features that alone might mean nothing, but many of them together are indicative that the damage was intentional:

  1. Damage appears on slopes in multiple directions (north, south, east, and west).
  2. Shingle damage lays out on a line or path of travel, such as vertically up the slope, up a valley, across a ridge, or laterally or diagonally across the slope.
  3. Shingle damage lays out in a random pattern but along an apparent path of travel.
  4. Areas of dislodged and torn shingle strips on leeward slopes or at shielded areas of the roof slope.
  5. Lifting, creasing, fracturing, and dislodging of shingle tabs or strips on leeward slopes or at shielded areas of the roof slope.
  6. Records of local winds indicate that the wind speeds were not great enough to cause damage to a reasonably well-maintained shingle.
  7. Records of local winds indicate that the damage to the shingles is not coincident with the direction(s) of the wind.
  8. Clusters of shingle damage lays out in an arc of arm reach from various stationary locations.
  9. Sample areas of damage scattered especially on multiple slopes, in multiple directions, or when pointed out by an advocate for wind damage.
  10. Clustered in an area, especially at easily accessible areas on steep roofs, rakes and eaves reachable from a ladder, or areas not readily visible to the passing public or neighbors.
  11. Scattered, but not widespread, only on slopes directed away from direction of wind or shielded from wind.
  12. Lack of widespread pattern of collateral wind damage to branches, limbs, trees, siding, trim, antennae, etc.
  13. Unsealed shingles, especially along the eaves and rakes, are not damaged.
  14. Scattered, but not widespread, only on upper or lower slopes.
  15. Cohesive failure in the asphalt mat or the sealant, especially in well-sealed tabs or in areas where uplift pressures are low due to location, shielding, known direction of high winds.
  16. Unbroken tab folded back and pressed flat to the roof surface, especially on multiple slope facing many directions or areas from wind.
  17. A completely fractured tab being relatively unmoved from its original position, especially if it has resealed.
  18. A partially fractured shingle tab with only fiber attachment being relatively unmoved from its original position, especially if it has resealed.
  19. A fractured or torn and dislodged piece of a shingle tab or strip.
  20. A partial, short length, isolated tear of a shingle tab or strip.
  21. Multi-directional tearing of shingles.
  22. Corner of tab bent or cracked from finger lifting well sealed tab at corner, especially at multiple locations.
  23. Short length partial tear emanating from edge or end of tab due to finger lifting well sealed tab, especially at multiple locations.
  24. Multiple lines of creases in the height of the tab.  (But not a band of contiguous crease lines.)
  25. Tool marks on underside of tab or top surface of underlying shingle.
  26. Nails bent over by impact or pulled out by prying with tools.
  27. Arched or jagged tears, especially those with feathering of the tear surface.
  28. Multiple conditions where vertical tears are in shingles covered by undamaged overlying shingles.
  29. The features of the shingle damage appears similar at each damage location.
  30. Undisturbed debris under the creased or broken tab.

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