Category Archives: Roof

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

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