Roof Flashing Repair in New Orleans: Where Leaks Really Start

If your New Orleans roof is leaking and the shingles look fine, the flashing is the first place to look.

Flashing is the metal that seals the joins: where the roof meets a chimney, a wall, a vent pipe, or another roof plane. It is not glamorous and it is not expensive, and it causes more leaks in this city than any other single part of a roof.

Key Takeaways

• Make sure to always check out your roof first to evaluate damage. For safety and effectiveness, schedule repairs in calm, dry weather.
• Take safety measures also — install a harness, non-slip footwear, and a reliable ladder.
• Collect essential tools like a pry bar, caulking gun, and roofing cement.
• Select sealants and flashing suitable for your roof and area.
• Practice good repair techniques: tear off the old flashing, clean and prepare the surface, put in the new flashing, and seal the edges to create a watertight seal.

Why Flashing Fails Faster Here

Sideways rain. Storm wind drives water at the flashing from angles it was never designed to shed. A detail that works in vertical rain can fail badly in a tropical storm.

Salt air. Metal corrodes faster near the lake and the Gulf. Older galvanized flashing on homes closer to the water gives out sooner than the same metal would inland.

Thermal movement. Summer heat expands metal, night cools it, and the cycle repeats all year. Fasteners loosen and sealed joints open. In a climate with a long, hot season this happens more times per year than it does further north.

Old chimneys. New Orleans has a lot of them. Masonry that has moved over a century puts flashing under stress no flashing detail was designed for.

Your Pre-Repair Checklist

Before you even begin work on roof flashing repairs, preparation is indispensable. That means, in short, a pre-repair checklist assists you in finding the trouble spots, working safely, and making no mistakes. Here’s what to cover:

• Safety First

Repairing a roof is dangerous. Start with a firm ladder on solid ground, supported. Use non-slip shoes, gloves, and a safety harness to prevent falling. Watch the weather reports—never work when it’s raining or extremely windy because wet surfaces heighten the accident possibilities. Always have a buddy puller or spotter around to give you a hand or summon help.

• Tool Arsenal

Gather all required tools in advance. A pry bar, hammer, and caulking gun — for prying up damaged flashing and affixing replacements. Roofing nails and tar-resistant roofing cement should be readily available. Utilize the utility knife for trimming and the tin snips for cutting metal flashing. Check tools for wear or damage to prevent delay or accidents mid-repair.

• Material Selection

With the right materials, roof flashing is guaranteed to last. Select flashing appropriate to your roof—aluminum and galvanized steel are typical, with copper fitting upscale roofing. Apply weather-resistant sealants or heat and moisture-expansion and contraction-resistant roofing cement. In case of broken shingles around the flashing, be sure to replace them with quality shingles to maintain an even appearance and extended lifespan.

• Code Compliance

Correct flashing installation should adhere to local building codes. Here’s a quick reference:

Consult these codes to be sure your repairs are up to code. Blunders will mean fines or deeper fixes down the road.

Repair or Replace the Flashing

Repair makes sense when the metal is sound and a sealed joint has opened, or a few fasteners have backed out, and the roof around it has plenty of life left.

Replacement makes sense when the metal is corroded through, when the flashing was installed wrong in the first place, or when you are replacing the roof anyway. Reusing old flashing under a new roof is a false economy that shows up as a leak in year two.

One local note. If the house is in an HDLC district, exterior work on a visible chimney or roof detail may need revie