Asphalt shingles – lower edges (tabs) of shingles are lifting
Cause
Wind has lifted the lower edges of shingles, particularly when the adhesive may have become soft in warm weather
Repair
- add extra bituminous adhesive under each tab as recommended by the manufacturer, and press firmly in place
Cause
Tabs were not secure because the sealing strip did not line up with the adjacent shingle when they were installed
Repair
- add extra bituminous adhesive under each tab as recommended by the manufacturer, and press firmly in place
Cause
Incorrectly nailed shingles, for example where nails were fixed through the sealing strip, limiting the effectiveness of the seal
Repair
- add extra bituminous adhesive under each tab as recommended by the manufacturer, and press firmly in place
Cause
The self-adhesive strip failed to fully adhere during cold weather installation
Repair
- add extra bituminous adhesive under each tab as recommended by the manufacturer, and press firmly in place