Why that's good for your shingles is this will allow a cooling process in your attic. So it doesn't get quite as hot when the shingles get baked from above and below. That can wear on them, and they end up becoming more brittle because they're taking heat from two sides. However, when you have a solar attic breeze that ensures your attic has proper air ventilation, those undersides of the shingles stay cooler. Therefore, they keep their integrity and can absorb impact better.