Shingle Unsealing: A Clear Sign Your Roof Is Nearing the End of Its Service Life

One of the most reliable indicators that a shingled roof is reaching the end of its useful service life is shingle unsealing.  Seal tabs are the adhesive strips on asphalt shingles designed to bond the overlying shingle to the underlying one. Their purpose is critical: they create a tight seal that prevents wind uplift, keeping shingles in place during storms and protecting the home beneath.

While seal tab failure is often due to aging, it can also result from poor installation practices, manufacturing issues, or environmental factors. The once-flexible bond dries out and loses its tack, no longer securing the shingles together. When this happens, shingles can begin to lift, flap, or even blow off in strong winds. This not only compromises the roof’s structural integrity but also exposes it to water infiltration and leaks.

Most asphalt shingle roofs are expected to last 25 to 40 years, depending on materials, installation, and climate. But as a roof nears the upper end of its economic life expectancy, problems like seal tab defeat become increasingly common. During this period, homeowners often experience a rise in repair needs, as leaks and shingle displacement occur more frequently.