The answer to 'why is my roof vent cracked' is that a cracked roof vent is often caused by age, weathering, or physical damage. Over time, the materials in the roof vent can become brittle and crack due to exposure to the elements. Roof vents may also crack if they are impacted by falling debris, hail, or other physical damage.
If your roof vent is cracked, it can allow water to leak into your home, leading to potential water damage and mold growth. It's important to address a cracked roof vent promptly to prevent further issues.