The answer to 'why is my drip edge cracked' is that the drip edge has likely become damaged or worn over time due to exposure to the elements. Drip edges are the metal flashing installed along the edges of a roof to direct water away from the fascia and prevent water damage. Cracking can occur due to factors like age, weathering, or improper installation.
Some common causes of cracked drip edges include thermal expansion and contraction, corrosion from moisture, and physical damage from things like falling debris or improper installation. Symptoms may include visible cracks, splits, or holes in the drip edge material. If left unrepaired, a cracked drip edge can allow water to penetrate behind the fascia and lead to rot, mold, and other serious roof and home damage.