Category Archives: Case Studies

The Importance of Galvanizing Lintels

Posted by in Case Studies, Steel, What happens when ...? | September 24, 2018

The featured photograph shows a lintel that was removed from over a door opening. The brick wall is about 45 years old and faces west. The age of the brick veneer and the lintel are not known with certainty, but… Read More

The Importance of Allowing Room for Expansion and Contraction

Posted by in Case Studies, Structural Principles | September 10, 2018

While waiting at an exit on I-71 for a traffic light to change, I noticed a large vertical split in one of the posts for the guardrail (see feature photo).  Being of the forensic persuasion, I gave a quick thought… Read More

What Can We Tell from This Photo? (Case Study 15)

Posted by in Apparent Mold/Biological Growth, Case Studies, Roof | July 31, 2017

The feature photograph was taken of the underside of a roof deck in an attic.  This photograph provides helpful information regarding the cause and history of the damage. From this photo we observe the following: The pixelated pattern of the apparent… Read More

Corrugated Brick Ties

Posted by in Case Studies, Masonry, What happens when ...? | June 26, 2017

How well do those corrugated brick ties perform over time? Not too well. The wall fallen in the featured photograph exhibited severely corroded ties that contributed to the failure of the brick veneer (Figures 1 and 2). The wall was… Read More

What Can We Tell from This Photo? (Case Study 14)

Posted by in Case Studies, Masonry | June 05, 2017

The feature photograph was taken of a chimney that had been clad with manufactured stone veneer.  This photograph provides helpful information regarding the cause and history of the damage. From this photo we observe the following: There is no waterproof membrane… Read More

Case Study: Hand Torn Shingles

Posted by in Case Studies, Shingles | September 12, 2016

The dimensional shingles on the roof exhibited many torn and dislodged shingle strips (see featured photo).  The shingle strips were well sealed and when they were lifted, the underside of the mat adhered to the underlying shingle (Figure 1).  In… Read More

Case Study: A Sagging Roof

Posted by in Case Studies, Roof, Wood | August 29, 2016

The roof of this barn exhibits a sag (featured photo).  The roof is framed with rafters (Figure 1).  The rafter ties are set very high to allow clearance for interior activities; however, this prevents the ties from adequately restraining the… Read More

Shingle Tab Lifted by a Raised Nail (Case Study)

Posted by in Buying/Maintaining a Home, Case Studies, Roof, Shingles | July 11, 2016

From the ground, I saw that the shingle looked slightly lifted.  See the featured photograph.  Further examination disclosed that the shingle was lifted by a raised nail. One of the nail had been installed at an angle and had backed out. … Read More