S D S Roofing | Roofing Services in El Cajon, CA 92021

In El Cajon, roof valley leaks are often caused by debris buildup, worn-out underlayment, or improper installation. Valleys channel a lot of water, so any weakness leads to leaks. We fix them by first clearing all debris, then removing damaged materials. We install new, high-quality waterproof underlayment and often recommend adding metal valley liners for superior, long-lasting protection against our local weather.

Flashing around chimneys, vents, and skylights can fail due to weather exposure, corrosion, or movement from temperature changes. Our repair process starts with a thorough inspection to identify all failure points. We then carefully remove the old, compromised flashing, prepare the surface, and install new, code-compliant flashing sealed with professional-grade materials to create a watertight barrier that will last for years.

You should address it immediately. Even a small leak from a valley or failed flashing can allow water to seep into your roof deck, insulation, and interior walls, leading to mold, structural rot, and costly repairs. We offer prompt inspections for El Cajon homeowners to assess the damage and provide a clear repair plan to prevent further issues and protect your home.