Fiberglass shingles work best when paired with proper attic ventilation, a key factor that prevents heat buildup and moisture accumulation under the roof. Ventilation allows hot, moist air to escape and fresh air to circulate, which helps extend the lifespan of your shingles and reduces the risk of issues like warping, curling, and premature aging. Roofs with poor ventilation often show signs such as weakened shingle granules, dark streaks, or blistered shingles. A simple way you can check ventilation is by entering the attic during the summer and feeling for stagnant heat or looking for visible signs of condensation or mold. Make sure soffit vents along the eaves and ridge vents at the peak are clear of debris and properly spaced to enable airflow. Without adequate ventilation, fiberglass shingles can deteriorate faster, potentially voiding their warranty.
If you suspect ventilation problems, it’s wise to call a professional roofer for a thorough assessment. When speaking with a contractor, ask specifically how they plan to balance intake and exhaust ventilation to comply with building codes and shingle manufacturer requirements, as this directly impacts warranty coverage. Also inquire about how they will ensure your attic airflow is not blocked by insulation or other obstacles. A qualified roofer should examine your roof's structure, advise on vent placement, and recommend upgrades if necessary. Remember, proper ventilation isn’t just about prolonging shingle life—it also improves attic energy efficiency and indoor comfort. Taking these steps early can save you from costly repairs down the line.