Chimney Flashing Repair in Nassau County — Stop the Leak at the Source

Chimney flashing is the metal system sealing the joint between your chimney and roof. It consists of step flashing along the chimney sides and counter flashing embedded into the chimney mortar joints. It leaks when mortar cracks release the counter flashing, step flashing corrodes, or previous caulk repairs dry out and crack — typically within 1–3 years.

If water staining appears on your ceiling or walls near the chimney base — especially during rain but not snow melt — the leak source is almost always chimney flashing, not the roof shingles. DME Maintenance provides free on-site diagnosis to confirm the exact source before any repair work begins. Call 516-690-7471.

Chimney flashing repair cost varies significantly by the extent of failure and whether counter flashing re-embedding, step flashing replacement, or saddle/cricket work is needed. DME Maintenance provides free on-site estimates with written scope and photos — no obligation. Call 516-690-7471 to schedule.

Caulk and roofing cement are temporary measures that typically last 1–3 seasons before drying and cracking. They do not address the root cause — usually counter flashing that has pulled free from the chimney mortar joint. DME Maintenance re-embeds counter flashing into fresh mortar for a permanent repair.

Often yes. Flashing failures usually accompany deteriorated mortar joints — the same moisture that compromised the flashing has worked into the masonry. DME Maintenance assesses the full chimney during every flashing repair and recommends combining with ChimSaver waterproofing to protect the repaired surfaces.