Category Archives: Roof

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

Do Leaf Guards Have an Effect on Icicles?

Posted by in Roof, Water Sources, Winter Concerns | April 13, 2015

Many, many years ago my father-in-law asked me about any detrimental effects of leaf guards on gutters.  Being over eighty he had decided that it was time to stop climbing a ladder to clean his gutters. I told him that… Read More

How Much Snow Can My Roof Support?

Posted by in Roof, Snow Loads, Winter Concerns, Wood | March 02, 2015

After a succession of heavy snowfalls, we are often asked the question, “How much snow can a roof support?” or more specifically, “How much snow can MY roof support?” and “Should I shovel the snow off my roof?” Most who… Read More

Sawing Off the Limb You Are Standing On

Posted by in Roof, The Unusual, Wood | February 02, 2015

Many of us have heard the expression, “You are sawing off the limb you are standing on.”  Often someone will say this during a friendly debate when the other debater is undermining his own argument by discrediting his own evidence.… Read More

This Doesn’t Look Right

Posted by in Buying/Maintaining a Home, Roof, Wood | January 26, 2015

“If it doesn’t look right, it probably isn’t,” it one of my favorite saying.  I started saying that after numerous times of seeing something that didn’t look quite right, and upon further examination I found that it wasn’t.  That is… Read More

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