Delamination Discovered on a 20-Year-Old Shingle Roof in West Ashley, Charleston, SC

We were contacted by a homeowner in West Ashley after they received a letter from their insurance company requiring replacement of their architectural shingle roof due to age. As roofs in the Charleston area approach the 20-year mark, insurance carriers often require updates to reduce storm-related risk exposure—especially in coastal environments prone to hurricanes and wind-driven rain.

Before committing to a full roof replacement, the homeowner wanted a professional inspection to better understand the actual condition of the roof and confirm whether replacement was truly necessary.

Property Details

Location: West Ashley, Charleston, SC
Roof Type: Architectural Shingle
Roof Age: Approximately 20 Years
Front Slope: 12/12 Pitch
Rear Slope: 7/12 Pitch

Initial Observations

From the ground, the front slope of the roof immediately appeared weathered and sun-exposed, which is typical for a 20-year-old roof in Charleston’s hot, humid climate. The steep 12/12 pitch showed signs of aging, including granule loss and general fading from years of UV exposure.

Despite the cosmetic wear, the shingles appeared structurally intact from street level. The lamination seemed to be holding together, and there were no obvious signs of widespread failure visible from below.

Findings

Once we safely accessed the roof for a hands-on inspection, the condition of the rear slope told a very different story.

The back side of the roof, which has a lower 7/12 pitch, showed consistent and complete delamination across the entire field of shingles. The laminated layers were separating, significantly reducing the shingles’ ability to properly shed water and withstand wind-driven rain. While there were no active interior leaks at the time of inspection, the integrity of the roofing system had been compromised.

Why This Happened

Roof pitch plays a major role in how shingles age over time—especially in coastal South Carolina.

Steeper slopes like the 12/12 front elevation shed water quickly and dry faster after rain events. Lower slopes, such as the 7/12 rear elevation, retain moisture longer and are more vulnerable to prolonged humidity and wind-driven rain. Over the course of 20 years, that additional exposure can accelerate adhesive breakdown, granule loss, and ultimately shingle delamination.

This roof was a clear example of how two sections of the same home can age very differently depending on pitch, sun exposure, and moisture retention.

The Risk

Delamination weakens the structural integrity of architectural shingles. Once the layers separate, the shingle’s wind rating is compromised, making it far more susceptible to lifting during Charleston’s strong coastal storms. Water intrusion becomes much more likely, particularly during heavy rain or tropical weather events.

Because these issues are often not visible from the ground, many homeowners are unaware of the deterioration until a leak develops or an insurance inspection flags the roof.

Recommendation & Next Steps

Given the widespread delamination on the rear slope and the roof’s overall age, full roof replacement was recommended. Replacing the system would ensure compliance with insurance requirements, restore wind resistance, and provide long-term protection against Charleston’s coastal weather conditions.

This project highlights an important takeaway for homeowners in West Ashley and throughout Charleston: you cannot accurately judge a roof’s condition from the ground. A professional inspection is critical—especially as a roof approaches the 20-year mark.