This is how NOT to fasten common asphalt shingles: With a nail driven at an angle, thus, reducing the pull through strength and causing a hump that lifts the overlying tab. With nails over driven so that they are cutting… Read More
Category Archives: Shingles
Leakage at the Soil Stack and a Method of Repair
Noticing moisture staining or peeling paint at the top of the wall above the toilet in your bathroom? Does the damage resemble the peeling paint in Figures BR-1 and BR-2 below? Lastly, does the location of the moisture staining or… Read More
Right and Wrong Ways of Siding Installation
There is a right way and a wrong way to do most tasks in life. This is also true when it comes to the installation of vinyl or aluminum siding on a wall above a roof slope. It is good… Read More
Uniformly Spaced Spots of Granule Loss on Shingles
There are a number of causes of spots of granule loss on shingles. In this article we look at a manufacturing defect. Note the relatively uniform spacing of the spots of granule loss in Figure 1. Note also the consistency… Read More
What Can We Tell from This Photo? (Case Study 16)
The feature photograph was taken of applique shingles. Applique shingles provide a dimensional appearance by adding a second coating of asphalt and granules, called an applique, over some areas to give the shingle a thicker appearance. This photograph provides helpful information… Read More
These Are DEFINITELY Intentional
Here are some photographs of intentional mimicking of hail damage. Note the curved impressions in the asphalt, the pulverizing of the granules, the pushing of the granules into the asphalt, the lip at the edge of the mark, and the matching… Read More
Is Hail Impact Damage to Shingles Immediately Noticeable? (Encore – Updated)
It is claimed by some that damage from hail impact may cause a gradual loss of granules that can result in premature aging of the shingles over time. They further say that without visible damage, there is no real way… Read More
What Happened Here?
The shingles along the eave of roof exhibit broken and dislodged tabs and surface gouges (Figure 1). What could have caused this? Vigorous ice removal. The damage is along an area that was reportedly covered with ice (see featured photograph).… Read More