Category Archives: Roof

What Can We Tell from This Photo? (Case Study 5)

Posted by in Roof, Shingles, Simple Forensic Methods | December 08, 2014

  This is an exercise to develop the abilities of observation. What can one know from examining this photograph? The cohesive failure of the asphalt in the mat, especially at the right end, indicates that the force required to lift… Read More

Humps and Sags in a Roof Framed with Sawn Lumber

Posted by in Roof, Wood | December 01, 2014

We are sometimes contacted to evaluate humps and/or sags in roof slopes, as shown in the featured photo and Figures HS-1.  Most often we are asked to evaluate residential roofs which are commonly framed with 2×6 or 2×8 rafters.  … Read More

Please, Mr. or Ms. Architect, No More Roof Geometry Like This

Posted by in Roof, The Unusual, Water Sources | November 17, 2014

I don’t know how many times we have been contacted to evaluate interior water damage (Figure NMRG-1) that was a result of poor roof geometry. Many times examination of the roof and/or the siding on the exterior reveals the obvious… Read More

Improper Repair Techniques

Posted by in Roof | November 10, 2014

When a roof leak is discovered, it is recommended that the repair be made on the roof side of the leak.  That is, the repair must be applied at the roof to prevent water from rain and snow melt from… Read More

Can Ventilation Really Reduce Condensation and Mold Growth in an Attic?

Posted by in Apparent Mold/Biological Growth, Attic Ventilation, Roof, Wood | August 11, 2014

Most in the construction industry know that the attics of wood framed structures require adequate ventilation to reduce the risk of the condensation of excessive airborne moisture and the resulting mold growth. But, how much does ventilation reduce condensation and… Read More

A Roofer’s Nightmare

Posted by in Roof, The Unusual | July 28, 2014

Roof leakage through an asphalt  shingle roof covering can be the result of many causes.  Sometimes the shingles were damaged by some event, other times its severe wear from aging, we have seen improper installation, or as we discuss here… Read More

Time to Check Those Roofs for Debris

Posted by in Buying/Maintaining a Home, Roof | June 23, 2014

Even though it is already well into June 2014 we are still finding roofs with accumulations of debris from last fall and winter.  Come on, my friends, it is time to get those valleys and gutters cleaned of debris!  Roofs… Read More

Power Washing Shingles?

Posted by in Apparent Mold/Biological Growth, Buying/Maintaining a Home, Roof, Shingles | June 07, 2014

Looking to high pressure wash (power wash) all that dirt, discoloration, mold growth, lichens, etc. off your shingles?  Have you seen advertisements in various local papers regarding high pressure washing shingles?  Here are a few observations. We have the experience… Read More