Asphalt shingles are a popular roofing material known for their affordability, durability and ease of installation. However, homeowners occasionally encounter issues such as blistering, which can compromise the integrity of their roofing system. In this post, a local roofing professional discusses the reasons behind asphalt shingle blistering and strategies to prevent and address this problem.
Causes of Asphalt Shingle Blistering
Blistering, characterized by the formation of raised, bubble-like protrusions on the surface of asphalt shingles, can occur due to several factors.
- Moisture Accumulation: One of the primary contributors to blistering is the accumulation of moisture within the layers of the shingles. As time goes on, excessive moisture can infiltrate the shingle material, causing blisters to form as the trapped moisture heats and expands when exposed to sunlight.
- Poor Ventilation: Inadequate ventilation in the attic can exacerbate moisture-related issues. Without proper airflow and with heat and humidity stuck in the attic space, your shingles can absorb excess moisture. Over time, this can lead to blister development.
- Manufacturing Defects: Blistering can also arise due to manufacturing defects in the shingles themselves. Irregular distribution of asphalt during the manufacturing process can create weak points within the shingles. This makes them susceptible to blistering when subjected to temperature fluctuations.
- Installation Errors: Improper installation practices can play a significant role in the development of shingle blisters. Factors like overdriven nails, incorrect nailing patterns, or inadequate adhesive usage can compromise the structural integrity of the shingles. This allows moisture to penetrate and blisters to form.
How to Prevent Blistering
To mitigate the risk of moisture-related issues, ensuring adequate attic ventilation is crucial. This regulates temperature and humidity levels, minimizing the likelihood of moisture buildup and blister formation on your residential roofing.
Employing experienced roofing professionals for shingle installation can significantly reduce the chances of issues arising from poor installation practices that contribute to blistering. Moreover, opting for high-quality shingles from reputable manufacturers can minimize the risk of obtaining defective materials.
Conducting routine inspections of the roof can help identify signs of blistering or other concerns early on. Swiftly addressing these issues can prevent further deterioration. Upon identifying blistering, prompt action is essential. Replacing the affected shingles prevents water infiltration and halts the progression of damage.
Protect Your Home
Asphalt shingle blistering can negatively impact residential and commercial roofing systems. However, with regular professional inspections and prompt repairs from a reputable company, you can keep your roof in good shape.