A cedar roof leak occurs when water penetrates through the cedar roofing system and reaches the underlying structure or interior spaces of a building. Leaks can develop from damaged shakes, failed flashing, deteriorated underlayment, or moisture-related wood decay.
Because cedar roofs rely on overlapping wood shakes for water shedding, any disruption in alignment or integrity can create vulnerable entry points for water. Common causes include splitting, curling, moss buildup, missing shakes, and improper repairs.
Leaks often appear near valleys, chimneys, skylights, and roof penetrations where water concentration is highest. Early warning signs may include ceiling stains, attic moisture, mold growth, or damp insulation.
Prompt repair is essential because prolonged water intrusion can damage decking, framing, insulation, and interior finishes. Professional inspections help locate the true source of leaks, which may not always align directly with visible interior damage.
Regular maintenance significantly reduces the likelihood of cedar roof leaks and helps preserve long-term waterproofing performance.
