Category Archives: Shingles

Observations Regarding Wind Damage to Shingles

Posted by in Shingles, Wind Damage | November 02, 2015

Just because a tree or portion of a large tree has been felled by wind doesn’t necessarily mean that the shingles have been damaged by wind (See the photos below of the undamaged shingles on the roof near a fallen… Read More

Cleaning Lichens from Shingles (An Experiment)

Posted by in Buying/Maintaining a Home, Roof, Shingles | October 05, 2015

While performing my annual pre-winter roof maintenance this fall I again noticed the moderate growth of lichens on parts of my roof.  The lichen growth is in areas that are heavily shaded (Figures L-1). I thought that this might be… Read More

Shingles with Jen-U-Wine Hail Damage

Posted by in Roof, Shingles | September 28, 2015

We have evaluated a number of roofs this summer for hail damage.  We have evaluated more roofs than most years, but not as many as in some of the past years. And now, for your viewing pleasure, I now present a… Read More

What Can We Tell from This Photo? (Case Study 11)

Posted by in Shingles, Simple Forensic Methods, Winter Concerns | August 17, 2015

What can we tell from THIS photo?   This photo was taken at a valley on a shingle roof. The shingles on the left are less weathered indicating that they are not as old as the shingles on the right.… Read More

How many layers of shingles?

Posted by in Roof, Shingles, Wood | June 22, 2015

How many layers of shingles can be safely supported on a wood framed residential roof? Most building codes limit the number of layers of shingles to two.  As a structural engineer, I design for two, but I prefer one layer… Read More

A Roofer’s Nightmare – Part 2

Posted by in Buying/Maintaining a Home, Roof, Shingles, Water Sources | June 08, 2015

Occasionally, we get to see a roof that causes us to say, “Yikes!” or some other such exclamation.  This week we have such a roof. Here, a large area of roof drains down into a small gutter and then onto… Read More

“I’ve Never Seen Any Shingles Like THIS Before!”

Posted by in Buying/Maintaining a Home, Roof, Shingles, Structural terms | May 11, 2015

“I’ve never seen any shingles like THIS before!” We have heard this comment more than a few times, even from roofers.  What was being referred to are the shingles seen in the feature photo and Figures WRS-1 and WRS-2.  These… Read More

Inadequate Roof Flashing

Posted by in Buying/Maintaining a Home, Construction & Shortcuts, Roof, Shingles, Water Sources | April 27, 2015

We are often contacted to evaluate the source of moisture or water that is causing apparent mold growth, decay, moisture staining, or another type of water damage.  Sometimes the cause of the moisture or water source is a little easier… Read More