Category Archives: Shingles

Compare: An Adhesive Failure Vs. a Cohesive Failure in an Asphalt Shingle

Posted by in Shingles, Wind Damage | September 16, 2013

The wind resistance of asphalt shingles is strongly correlated to the sealing of the tabs.  That is, if the tabs are well sealed, the shingle have excellent resistance to damage from exposure to high winds.  An exception to this is… Read More

Tips for Identifying Intentional (Advertent) Damage to Asphalt Shingles – The Pattern of Compatibility – Part 5

Posted by in Roof, Shingles | May 13, 2013

We have been discussing three fundamental patterns that may be used to distinguish intentional manual damage  from naturally occurring hail or wind damage.  These fundamental patterns are: Natural Order vs. Unnatural (Artificial) Order Sufficiency vs. Insufficiency Compatibility vs. Incompatibility  In… Read More

Tips for Identifying Intentional (Advertent) Damage to Asphalt Shingles – The Pattern of Sufficiency – Part 4

Posted by in Roof, Shingles | May 06, 2013

We have been discussing three fundamental patterns that may be used to distinguish intentional manual damage  from naturally occurring hail or wind damage.  These fundamental patterns are: Natural Order vs. Unnatural (Artificial) Order Sufficiency vs. Insufficiency Compatibility vs. Incompatibility In… Read More

Tips for Identifying Intentional (Advertent) Damage to Asphalt Shingles – The Pattern of Order – Part 3

Posted by in Roof, Shingles | April 29, 2013

In our last post we introduced three fundamental patterns that may be used to distinguish intentional (advertent) manual damage from naturally occurring hail or wind damage.  These fundamental patterns are: Natural Order vs. Unnatural (Artificial) Order Sufficiency vs. Insufficiency Compatibility… Read More

Tips for Identifying Intentional (Advertent) Damage to Asphalt Shingles – General Principles – Part 2

Posted by in Roof, Shingles | April 22, 2013

In our last post we discussed the increased frequency in the number of intentionally (advertently) damaged shingle roofs that we have evaluated over the years.  In this post we discuss the method of evaluating shingle roof damage with regard to… Read More

Tips for Identifying Intentional (Advertent) Damage to Asphalt Shingles – Introduction – Part 1

Posted by in Roof, Shingles | April 15, 2013

We have often been engaged to evaluate damage to asphalt shingle roofs.  Some of our evaluations have concluded that the damage was intentionally applied in a fashion that appears to mimic hail or wind damage.  By intentional we mean advertent,… Read More

Shingle Damage Evaluation – Intentional Damages to Mimic Hail Damage – Part 7

Posted by in Shingles | August 20, 2012

This post is Part 7 of Shingle Damage Evaluation and follows Other Damages That May Be Mistaken for Hail Damage – Part 6d. In this post we discuss mechanical damage marks on shingles that were applied with the intention to mimic hail damage,… Read More

Shingle Damage Evaluation – Other Damages That May Be Mistaken for Hail Damage – Part 6d

Posted by in Shingles | August 13, 2012

This post is Part 6d of Shingle Damage Evaluation and follows Other Damages That May Be Mistaken for Hail Damage – Part 6c. Other Damages That May Be Mistaken For Hail Damage – Part 6, is comprised of four posts that discuss the causes… Read More