If you have ever had a blister from doing yard work or from too many swings on a golf course you probably have a pretty good idea about what blistering looks like on shingles. Blistering appears as bubbles raised on… Read More
News & Resources
Mmmmm, Maple Seeds
“Mmmmm, Maple Seeds,” must be what the squirrel or another rodent was thinking when one of them scratched away at the shingles leaving a broken edge (see the featured photo and Figure 1). We see this sometimes on roofs with… Read More
Unnatural Pattern of “Alleged Wind Damage”
The relatively uniform spacing of the missing tabs within the fields of the roof slopes, the almost identical pattern of the fractures and cracking of the tabs, and the presence of this pattern on multiple slopes facing multiple cardinal directions… Read More
Buckling, Sliding, and Thermal Tearing of Shingle Strips
In the featured photo the shingles exhibit buckling at the ends of the shingle strips. This buckling is similar to the buckling of a concrete roadway in the summer. The shingles have expanded from excessive heat or swelled from excessive… Read More
Case Study: Hand Torn Shingles
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
Thoughts for this Labor Day (2016)
Two observations and a promise regarding labor on this Labor Day. Observation #1 Unless the LORD builds the house, those who build it labor in vain. Unless the LORD watches over the city, the watchman stays awake in vain. (Psa… Read More
Case Study: A Sagging Roof
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
The Need for Membrane Flashing Under a Threshold
Whether a manufactured stone with multiple joints or a solid board is used under the threshold of a door (featured photo), a flexible membrane flashing is necessary to stop the infiltration of runoff. On the inside, runoff infiltration through a… Read More