Shingle Tab Lifted by a Raised Nail (Case Study)
From the ground, I saw that the shingle looked slightly lifted. See the featured photograph. Further examination disclosed that the shingle was lifted by a raised nail.
One of the nail had been installed at an angle and had backed out. When I removed the nail, the shingle remained raised because it had deformed over the nail head.
The sealant was scraped off the underside of the tab, the old nails removed, new nails installed in the old holes and alongside each nail. One of the new nails didn’t engage solid wood, so, we ended up with five nails at the joint.
The tab was then re-sealed with an asphalt sealant and held down with a brick to undo the deformation.
The final result is shown in Figure 4.