Category Archives: Roof

Quick & Easy Repair for a Soil Stack Boot

Posted by in Buying/Maintaining a Home, Roof, Shingles | December 14, 2015

Ever get up on a roof and find the soil stack boot has deteriorated or split (see the feature photo).  It is one of those “Argh” moments. Here is a quick repair that may come in handy this winter or… Read More

An Oversight Makes a Rafter More Susceptible to Fracture

Posted by in Construction & Shortcuts, Roof, Structural Analysis, Wood | December 07, 2015

In the featured photograph we see where the rafter fractured at its end.  This fracture was due to vertical tension in the rafter.  That is, the weight of the roof framing and the snow were pushing downward along the length… Read More

Please be careful this winter!!!!!!!!!!!!!!!

Posted by in Buying/Maintaining a Home, Roof, Shingles, Snow Loads, Weather Events | November 09, 2015

If you are chipping ice dams out of the gutters and valleys of your roof this winter, please be careful. I know it gets frustrating as we chip away at the ice in the cold, but a few slips of… 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

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