Flashing seals the joints where a roof meets a chimney, wall, vent, or other feature. When it loosens or deteriorates, water can work beneath shingles and damage the roof structure or interior. Some warning signs are visible from the ground; others appear as stains or dampness inside. Knowing what to look for helps you respond before a small defect becomes a larger repair. Use these checks to decide when to arrange a professional assessment, and avoid climbing onto the roof yourself.
Look for Lifted or Loose Edges
From the ground, look for flashing that appears bent, raised, or out of line with the roof surface. Pay particular attention around chimneys, vent pipes, skylights, and roof-to-wall joints. A visible gap can let wind-driven rain beneath the roofing material. Do not pull on a loose piece or climb up to inspect it; flashing edges can be sharp, and roof surfaces can be unsafe.
You may also notice a change after strong wind or a storm, such as a metal edge that no longer sits flat or a piece of material on the ground. Take a photo from a safe location and note where you saw it. If a gap is visible, water is entering, or the flashing has shifted noticeably, arrange a prompt professional inspection.
Check for Corrosion and Damage
Metal flashing can corrode, especially where moisture collects or protective coatings have worn away. Look for rust-colored streaks, pitting, holes, or sections that appear thin or broken. On painted metal, peeling or blistering may signal that the surface is deteriorating. A small patch of discoloration does not confirm a leak, but visible corrosion deserves attention before the metal loses its ability to shed water.
Storm debris, foot traffic, or previous repair work can also dent or tear flashing. Check for bent corners, cracked sealant, and exposed fasteners from the ground or from a safe vantage point. Sealant can help at specific joints, but it is not a substitute for sound flashing. A roofing professional can identify whether the metal needs resecuring, replacement, or a compatible repair.
Watch for Gaps and Interior Clues
Separated flashing may leave a gap where two pieces meet or where flashing meets a wall, chimney, or roof surface. Look for a joint that has opened, pulled away, or lost its seal. Water can enter through a small opening and travel along framing before it becomes visible indoors, so the stain may appear away from the actual roof defect.
Inside, watch for new ceiling or wall stains, peeling paint, damp insulation, or a musty smell near the roofline. These signs can have other causes, including plumbing leaks, so avoid assuming the flashing is responsible. Note when the problem appears and whether it follows rain. Share that information, along with photos, with the roofing professional assessing the roof.
Know When to Arrange an Assessment
Arrange a professional assessment if you see separated or lifted flashing, corrosion with visible holes, recurring interior moisture, or damage after a storm. A prompt inspection is especially important when water is actively entering or a ceiling is sagging. Keep people away from a sagging area, place a container under a drip if it is safe, and contact a qualified roofer rather than attempting a roof-level repair.
During the assessment, ask the roofer to identify the likely entry point, explain whether surrounding shingles or other materials are affected, and describe the repair plan. Mention any recent storms and when interior symptoms began. OKC Flashing Co. serves Oklahoma City homeowners seeking help with roof flashing concerns; you can contact the company to discuss an assessment.
Lifted edges, corrosion, open joints, and indoor moisture can all point to flashing trouble, but the visible clue may not reveal the full extent of the damage. Record what you notice and arrange an assessment when defects or leaks appear. For help evaluating roof flashing in Oklahoma City, contact a qualified local roofing professional.