Tab shingles, often called three-tab shingles, are a common roofing material known for their affordability and straightforward installation. Proper ventilation when using tab shingles is essential to prevent heat buildup and moisture accumulation, which can shorten the roof's lifespan. Ventilation works by allowing fresh air to enter through soffit or eave vents and escape through ridge or roof vents, maintaining a steady air flow that keeps the roof deck cooler and drier. Without adequate ventilation, you might notice symptoms like curling shingles, blistering, or premature granule loss. A simple DIY way to check ventilation effectiveness is to inspect your attic during the day; if it feels excessively hot or humid compared to outside air, your current ventilation could be insufficient.
If you suspect ventilation problems, it's important to call a professional roofer for a thorough inspection. They can assess if your attic has the recommended net free ventilation area, usually balanced between intake (lower roof) and exhaust (upper roof). When talking to a contractor, ask about their strategy for balancing ventilation with your specific roof design, and whether the current system meets local building codes and shingle warranty requirements. Another good question is if any additional roofing components like drip edge vents or baffles could improve airflow in your attic. These details matter not just for comfort inside the home, but for extending the life of your tab shingle roof and protecting your investment.