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Slideshow: 7 Types of Roof Shingle Damage

  3. Blisters are caused by the expansion of volatile gasses escaping from the asphalt layer. The gas migrates to the shingle’s surface, where eventually the top will erode and cause blistering. BLISTERS
  4. Prevention: Make sure your roof is properly ventilated and that shingles are not installed over wet surfaces, such as wet felt paper or roof decking. Treatment: There is no way to stop blistering once it starts to occur. Eventually, the roof will need to be replaced. If blistering is severe, where it opens up and exposes the mat of the shingle, then the roof will need to be replaced right away.
  6. Craze Cracks are a result of the mat of the asphalt shingle drying out over time which causes the mat to shrink and results in surface cracking. Shingles that exhibit this within a few years of being installed may indicate a manufacturer defect with the shingle. CRAZE CRACKS (THERMAL)
  7. Prevention: Craze cracks occur due to normal age and wear, so they are difficult to prevent. Treatment: Craze cracks are very common on roofing shingles and are usually harmless. When shingles exhibit craze cracks, they don’t necessarily need to be treated or replaced.
  9. Curling is when roof shingles start to lift and curl on the perimeter of the shingle. CURLING
  10. Prevention: Ensure your roof is properly ventilated. Roofs that have an additional layer installed over the top of the pre-existing layer are more susceptible to curling. Treatment: You can apply additional sealant to the underside of the shingles on the corner where the curling is occurring to reseal it to the roofing surface.
  12. Cupping is when shingles start to concave from the middle causing waves or cupping in the appearance of the shingle. Cupping is usually due to age-related wear to an asphalt or organic shingle roof. CUPPING
  13. Prevention: Make sure your roof is properly ventilated and shingles are replaced when their useful life has been exceeded. Treatment: When cupping occurs, it means that it’s time to replace the roof.
  15. Flaking is the deterioration of the roofing surface, which is usually caused by weathering of the shingle due to extreme age. FLAKING
  16. Prevention: Replace your roof when its useful lifetime is over. Treatment: When flaking occurs, it’s a sign that the roof should have been replaced many years ago. It’s time to replace the roof.
  18. A Hail Bruise occurs when a hail stone damages the shingle surface and mat which compromises the shingle’s water shedding ability. HAIL BRUISE
  19. Prevention: Besides living in an area where hail storms are less common, there’s no way to prevent this. Treatment: Replace the damaged shingles or the entire roof, depending on the amount of damage. This type of roof damage is covered by most standard homeowners insurance policies.
  21. A Manufacturer Defect is an issue caused during the manufacturing process of the shingle which causes a defect in the shingle. MANUFACTURER DEFECT
  22. Prevention: Unfortunately, this just happens sometimes. Treatment: You can contact the manufacturer of the shingle to learn about their policy for handling manufacturer defects. Some companies may be willing to reimburse you for the prorated life of the shingle if there’s a warranty and it’s covered by the manufacturer’s policy.
  23. CHOOSE A ROOFING CONTRACTOR Do your research! Find a licensed or bonded roofing contractor who has been in business in your area for several years. This will help ensure that if you have problems with the installation of your roof, the contractor you chose will be here to correct the problem. Don’t be afraid to request references, read online reviews or look for Better Business Bureau (BBB) complaints.
  24. A GOOD ROOFING CONTRACTOR WILL: • Have certificates of insurance for liability and workers’ compensation • Provide you with a detailed, written estimate, including approximate start and end dates, materials needed and labor costs • Give you a labor warranty for the installation of the roof
  25. You could also ask your independent insurance agent for a recommendation on a roofing contractor in your area!
  26. NEED AN INDEPENDENT AGENT? Find yours at Please contact a local independent Grange agent for complete details on coverages and discounts. If the policy coverage descriptions in this slideshow conflict with the language in the policy, the language in the policy applies. Insurance policies are offered through Grange Mutual Casualty Company, Columbus, OH, and its affiliated companies. Grange products not available in all states.