What is a common problem with hip and ridge flashings in concrete or clay tile roofs?

A common problem with hip and ridge flashings on concrete or clay tile roofs is cracked or shrinking mortar. This issue arises because the mortar used in these applications is often subjected to various environmental stresses, including temperature fluctuations, moisture, and settling. As the mortar cures, it can shrink, leading to cracks that compromise the integrity of the flashing. These cracks can allow water to infiltrate the roof system, potentially leading to leaks and further damage over time.

The integrity of the flashing is critical for preventing water penetration, especially at the ridges and hips where roof planes meet. When the mortar cracks, it not only reduces the effectiveness of the flashing but may also necessitate more frequent repairs or replacements, adding to the maintenance burden for homeowners. Proper installation and periodic inspection of hip and ridge flashings can help mitigate these issues, but attention to the mortar's condition is vital for long-term performance.