Chimneys
Base, step, and counterflashing combine, often with a cricket to divert water.
Roof Flashing Repair Services in Bronx, NY
Flashing is the thin metal at every joint of your roof, and it is where most leaks begin. We rebuild it properly, not just seal over it.
Professional Roof Flashing Repair
Roofing surfaces shed water well when they are unbroken, but every chimney, wall, vent, skylight, and valley breaks them. Flashing bridges those breaks so water always runs over the joint and never into it, and because it is thin and exposed, it wears out well before the roof surface does.
What Is Roof Flashing?
Flashing is the thin metal, membrane, and sealant at every joint and opening of your roof, layered so water always runs outward instead of behind it.
Where Roof Flashing Is Used
Signs of Damaged Roof Flashing
- Rust, corrosion, or white powdery buildup on the metal.
- Cracked, gapped, or missing sealant leaving open lines for water.
- Metal that is lifted, bent, or pulled away from the wall.
- Cracked or crumbling mortar around a chimney or wall.
- Stains on the ceiling next to a chimney, wall, or vent.
Common Causes of Flashing Damage
Sealant used in place of metal, corrosion and age, mixed metals that speed up corrosion, failed mortar joints, movement between roof and wall, and installation shortcuts account for most flashing failures. Impact from wind, ice, and debris can also bend or dislodge flashing.
Our Flashing Repair Process
Identify the Joint
We confirm which joint is failing and how far the damage extends.
Assess the Metal
We check whether the metal can be re-sealed, re-fastened, or needs replacing.
Rebuild the Layering
We rebuild the flashing in proper layers, not just a bead of sealant on top.
Test and Confirm
We confirm the repair sheds water correctly before we consider the job done.
Flashing Repair vs. Replacement
Re-Seal or Re-Fasten Fits When
- The metal is sound and well fastened.
- Only a hairline gap or loose fastening is present.
- The surrounding structure is dry and solid.
Replace or Rebuild Fits When
- The metal is rusted, cracked, or corroded.
- Mortar joints holding counterflashing have failed.
- The detail has leaked more than once.
How Damaged Flashing Can Cause Roof Leaks
Because flashing sits at every joint and opening, a small gap there can let in far more water than a similar-sized flaw on an open roof surface. See leaking roof diagnosis if you are not yet sure flashing is your problem.
Frequently Asked Questions
How soon should I fix cracked or rusted flashing?
Promptly, ideally before the next heavy rain. Flashing failures let water reach the deck and framing behind the wall, where damage grows out of sight.
Why does my chimney still leak after it was resealed?
Resealing treats a symptom. The real problem is often failed counterflashing, cracked mortar, or missing step flashing, which sealant alone cannot fix. We rebuild the layering instead.
What flashing material lasts the longest?
Copper and lead-coated copper last the longest but cost more and need skilled installation. Galvanized steel and aluminum are common, economical choices that need attention as coatings age.
Can flashing be repaired in winter?
Some repairs can be made in cold weather, though sealants and adhesives behave differently. We can often make a secure temporary repair and schedule permanent work for milder conditions.
Does homeowners insurance cover flashing damage?
It depends on the cause. Sudden storm damage is often treated differently from gradual wear. We are not an insurance advisor, so check your policy or ask your insurer directly.
How do I know if flashing or the roof itself is leaking?
Flashing problems often show at the joint before they show inside, and the stain location can point to a nearby chimney, wall, or vent. We can confirm the exact source during an inspection.
Call Bronx Roofing Pros
Schedule a Flashing Inspection
Tell us which joint or opening is leaking and we will rebuild it properly. Call (718) 719-0780.
(718) 719-07802243 White Plains Rd, Bronx, NY 10467