Boensch Roofing | Roofing Services in Philadelphia, PA 19116

In Philadelphia's older rowhomes, skylight leaks are frequently caused by aging or deteriorated flashing—the metal strips that seal the seam between the skylight frame and the roof. Temperature fluctuations and seasonal weather can cause the flashing to crack or pull away. A proper repair involves removing the old material, inspecting the underlying deck for rot, and installing new, properly integrated flashing to create a lasting seal against our local rain and snow.

Roof valleys are high-stress areas where two roof planes meet, channeling a large volume of water. In Philly, leaks here often stem from worn valley flashing, missing or compromised underlayment, or a buildup of debris like leaves and ice that forces water underneath the shingles. A lasting fix requires clearing the valley, replacing any damaged underlayment and flashing, and ensuring proper installation of new materials to handle heavy water flow and prevent future breaches.

Act immediately. Even a small, intermittent leak can lead to mold growth, damaged insulation, and compromised structural wood within weeks, especially given our humidity. We recommend calling for a professional inspection at the first sign of a water stain on your ceiling or wall. Prompt repair of the source—like a skylight or valley leak—prevents exponentially more costly interior damage and preserves the integrity of your home.