Blisters are raised areas or bubbles that form on the surface of roofing materials, such as shingles, as a result of trapped moisture or other types of damage. Blisters can be caused by a variety of factors, including improper installation, inadequate ventilation, or exposure to excessive heat or moisture.
Blisters typically form when moisture or gas becomes trapped between layers of the roofing material, causing the material to expand and form a raised area or bubble on the surface. Blisters can range in size from small bubbles to large, raised areas that can compromise the integrity of the roof system.
If left unaddressed, blisters can lead to more serious roof damage, including cracking, splitting, and other types of structural damage. To prevent blisters from forming, it is important to ensure that the roof is properly installed and maintained, and that any areas of damage or deterioration are promptly repaired.
If blisters are already present on the roof, it may be necessary to remove the damaged roofing materials and replace them with new materials that are properly installed and sealed. Proper ventilation and drainage can also help to prevent the buildup of moisture and reduce the risk of blister formation.
Overall, blisters are a common type of roof damage that can be caused by a variety of factors. Proper installation, maintenance, and repair of the roof can help to prevent blisters from forming, and can help to ensure the long-term durability and performance of the roof system.