Membrane roofing systems are prone to blistering and alligatoring. Alligatoring occurs when the roof surface develops cracks in a crazy pattern, resembling alligator skin. Bubbles can also form under the roof membrane, leading to blistering. Unlike alligatoring, the cracks caused by blisters usually follow the length of the roof and do not form a specific pattern.
What causes blistering?
Blisters can form when there are pockets between membrane layers or between the membrane and roof deck. These pockets expand and stretch the membrane as the sun warms the roof. If the pressure becomes too high, the membrane can crack.
Blisters are a common issue, even if the roof membrane does not crack. Once they appear, the membrane will stretch permanently, allowing more moisture or air to penetrate the membrane layers. Consequently, the membrane will expand further, and the blisters can grow larger each time the roof is heated by the sun.
What causes alligatoring?
If your roof is alligatoring, it shows signs of aging. Over three to five years, small cracks may appear in the roof coating due to the sun’s UV radiation. The problem will worsen if left unattended, as the sun, ice, and temperature changes between night and day contribute to the formation of more cracks.
Conclusion:
In conclusion, it is crucial to be aware of the potential issues that can arise with membrane roofing systems, particularly blistering and alligatoring. Blistering can lead to cracks when there are pockets between membrane layers or between the membrane and roof deck, causing long-term damage and allowing moisture or air to penetrate the layers. On the other hand, alligatoring, which resembles the pattern of alligator skin, indicates signs of aging in the roof and can worsen over time if not addressed promptly.
To ensure the longevity and functionality of your roof, regular inspections and maintenance are essential. Addressing blistering and alligatoring early on can prevent further damage and costly repairs down the road. Engaging professional roofing services for inspections and repairs is recommended, as they possess the expertise to identify and address these issues effectively.
Additionally, considering modern advancements in roofing technology and materials can contribute to the prevention of such problems. Investing in high-quality membrane roofing materials and incorporating appropriate ventilation systems can aid in minimizing the risk of blistering and alligatoring.
Remember, a well-maintained and structurally sound roof not only protects your property but also provides peace of mind during adverse weather conditions. So, take the necessary steps to safeguard your roofing investment, ensuring that it serves you faithfully for years to come.
This post was written by Ted Williams! Ted is the owner of A Old Time Roofing, one of the best roofing companies in Saint Petersburg, FL! Ted is a Master Elite Weather Stopper GAF Roofing Contractor, a double award winner of Best Steep-Slope Contractor from GAF and achiever of Master Elite Consumer Protection Excellence from GAF. He has been serving the Pinellas County area since 1978. Old Time Roofing has a tradition of quality workmanship, servicing residential and commercial properties. Click here for more information!