Highland Commercial Roofing | Roofing Services in Union City, CA 94587

In Union City, the most frequent cause is sealant failure around the skylight curb or flashing due to thermal expansion and contraction from our temperature swings. Constant sun exposure degrades the sealants, and seasonal fog can introduce moisture into tiny cracks. Our repair process involves a thorough inspection, removal of the old, failed sealant, and application of premium, UV-resistant flashing and sealants designed for our local climate to create a lasting, watertight seal.

Signs include unexplained spikes in energy bills, interior ceiling stains, or a persistent musty odor. Wet insulation loses its R-value, forcing your HVAC to work harder and increasing costs. More critically, trapped moisture can lead to wood rot, mold growth, and corrosion of the roof deck. For Union City buildings, we recommend professional moisture surveys. If damage is found, we safely remove the compromised insulation, dry the area completely, and install new, high-performance insulation with proper ventilation to prevent future issues.

Proactive biannual inspections are key, especially before the rainy season and after summer heat. We recommend checking and clearing drains and scuppers, inspecting sealant around all penetrations (like skylights and vents) for cracks, and ensuring roof insulation is protected and dry. As your local roofing experts, Highland Commercial Roofing offers customized maintenance plans that include these critical checks, helping you catch small problems like a failing skylight seal before they lead to major leaks and interior damage.