Proper ventilation for asphalt shingles is essential because it helps regulate temperature and moisture levels in your attic, extending the life of your roof and improving your home’s energy efficiency. Without enough ventilation, heat can build up under the shingles in summer, causing them to age prematurely and potentially warp or curl. In winter, inadequate ventilation can lead to moisture buildup that promotes mold or rot in the roof decking or attic framing. The most effective and common strategy combines intake vents, typically placed under the eaves or soffits, with exhaust vents near the roof ridge. This setup encourages a natural airflow that pulls cool air in low and pushes hot, moist air out at the peak, keeping shingles functioning properly and preserving the structural integrity beneath.
To check your ventilation system, you can safely inspect your attic on a dry, daylight day using a flashlight. Look for signs like dark streaks or powdery residue on the underside of shingles, which can indicate trapped moisture, or feel if the attic is excessively warm compared to outside. Also, ensure vents are not blocked by insulation or debris. If you’re unsure whether your ventilation is balanced, hiring a roofing professional can provide a thorough assessment. When you do consult a roofer, ask specifically how the ventilation meets local building codes and if it includes both intake and exhaust components. Also, inquire whether their recommended ventilation system will be compatible with your existing roof warranty, since improper ventilation can sometimes void coverage. These questions help ensure you get a strategy that’s effective, durable, and code-compliant.