Roofing in Rowland Heights Free inspection. Local crews. Honest report.

Almost always one of two issues. Either the ridge mortar has failed (common after 20-25 years) and ridge tiles are no longer securely held, or the underlayment beneath the field tiles has aged to the point where tile fasteners aren't gripping properly. Replacing missing tiles individually rarely solves the problem — once the underlying system is aged, more tiles will fail at the next wind event. The right call is usually a lift-and-relay or full reroof to address the actual failure point.

Labor concentration at the transitions. Each valley, hip, and ridge intersection requires custom flashing detail and skilled labor. A simple gable roof has 4-6 critical detail points; a complex hillside custom can have 20-30. Total roof surface (counting all the planes) often runs 25-35% more than the home's footprint implies, and labor scales nonlinearly with detail count. Quotes 30-50% above 'cost per square foot' calculations are usually honest pricing for genuine complexity.

Best time to do it, yes — installing skylights or solar tubes during an active reroof is significantly cheaper than retrofitting later, because the roofing crew can integrate the flashing as part of the roof system rather than cutting into an existing roof. Get the skylight selection and locations finalized before the reroof starts, not during. Modern skylights with proper step-flashing installation last as long as the surrounding roof; caulked-in retrofit installations fail within 5-10 years.