Metal Roof Over Shingles (Retrofit) in New Orleans, LA

If you own a post-war brick ranch in Lakeview, a raised bungalow in Carrollton, or a slab home in Metairie with a low-pitched shingle roof, a Metal Roof Over Shingles (Retrofit) in New Orleans is often the fastest path to a storm-ready roof without tearing the old one off. The flat Mississippi River crescent between the river and Lake Pontchartrain gives us long, soaking summer thunderstorms, tropical systems with tearing wind and wind-driven rain, and intense sun that cooks asphalt shingles until they curl and granulate. We install standing seam, 5V crimp, metal shingle, and stone-coated steel panels directly over your existing layer after we verify the deck is sound and dry. No tear-off means less landfill waste, fewer dumpsters in your driveway, and a lower labor bill. It also means we have to be honest with you when the existing shingles are too far gone and a full tear-off is the only correct call. Call (504) 636-6074 for a free inspection and a straight answer. If you are still weighing panels, start with our metal roof installation page to see what a new roof looks like from the deck up.

Why Retrofit Over Shingles Makes Sense on New Orleans' Low-Pitch Roofs

Most of the housing stock we work on was not built for a 50-year roof. The 1940s to 1960s ranches in Lakeview, Gentilly, and Metairie sit on shallow roof pitches with 3-tab or architectural shingles that have already been replaced once or twice. Every tear-off adds a layer of cost and exposes the deck to whatever the sky is doing that week. A retrofit lets us keep the existing layer as a substrate and put a metal skin over it.

• We save you the tear-off labor and dumpster fees, which is usually the single biggest line item on a re-roof estimate.
• We keep your attic and living space covered for most of the job, which matters when afternoon storms roll in off the lake.
• We add a wind-resistant metal skin over the old shingles, which is exactly what these low-slope roofs need before the next named storm.
• We reduce landfill waste, since one to two tons of old shingles never leave your property.
• We verify the deck first, because a retrofit is only as good as the wood and underlayment holding it up.

The trade-off is real: a retrofit adds dead load and hides the deck, so it only works when the existing roof is flat, dry, and within code limits on layers. We check all of that before we quote.

Key info: On a 1950s ranch in Lakeview with one layer of architectural shingles and a 4/12 pitch, we commonly retrofit a standing seam or exposed-fastener panel system without a tear-off. On a double shotgun in the Irish Channel with two layers and soft decking at the eaves, we recommend a full tear-off and deck repair instead. The house decides, not the sales pitch.

Local code limits how many shingle layers can stay in place, and the City of New Orleans permitting office enforces that on re-roofs. You can read the general permit requirements through the City of New Orleans One Stop Shop before you commit to a scope.

How We Install a Metal Roof Over Shingles in New Orleans, Step by Step

A retrofit is not a shortcut. It is a different sequence, and the first three steps decide whether the job lasts 15 years or 45. We start in the attic and on the roof, not with a panel order. Here is the sequence we run on a typical New Orleans or Metairie home.

1. We inspect the attic and roof deck for soft wood, active leaks, and moisture staining before anything else happens.
2. We check the existing layers and pitch against local code limits and confirm the structure can carry the added panel weight.
3. We replace rotten decking and flashing at the eaves, valleys, and penetrations, because covered rot does not stop rotting.
4. We install a slip sheet and underlayment over the shingles to separate the old surface from the new metal and shed any trapped moisture.
5. We set the panel layout and fasten the panels into the deck and framing, not just into the old shingles.
6. We flash the chimney, skylights, and vents with new metal, then seal and test with water before we leave.
7. We walk the roof and gutters with you and hand over photos of the deck condition we found under the old surface.

Skipping the deck check is how retrofit jobs fail two summers later, so we do not skip it.

Key info: On a raised bungalow in Carrollton, we found soft decking around the chimney chase that the prior roofer had shingled over twice. We replaced eight feet of deck and the chimney flashing, then ran the retrofit panel over it. That repair cost less than a leak inside the living room and a mold remediation bill. Homeowners in Metairie (70001) with similar low-pitch ranches get the same deck-first inspection.

Retrofit Approaches We Use on New Orleans Homes

Not every panel system works over shingles, and not every pitch works with every panel. We match the approach to the roof you actually have, the pitch it was built with, and the look your block or historic district will accept.

We tell you which row you fall into after we inspect, not before.

Metal Roof Over Shingles (Retrofit) Cost in New Orleans: What to Expect

Most retrofit projects in the New Orleans area start around From $7/sq ft installed, and that figure moves with the panel type, the pitch, the number of penetrations, and how much deck repair we find. A simple gable ranch in Harahan with one layer of shingles and a clean deck sits near the low end. A hipped roof in the Garden District with a chimney, two skylights, and original 1920s decking pushes toward the high end.

Three things drive the number more than anything else. First, deck condition: soft wood at the eaves or around the chimney adds repair hours. Second, access: a steep pitch, a tight lot, or a roof crowded with oak limbs slows the crew and adds safety rigging. Third, panel choice: exposed-fastener panels cost less than standing seam or stone-coated steel, and the gap is meaningful on a 2,000 sq ft roof.

We recommend getting two or three written estimates and comparing scope, not just the bottom line. A cheap bid that skips the deck inspection is not cheaper in year three. Our full pricing overview breaks down the line items so you can compare apples to apples.

Key info: A 1,800 sq ft single-story ranch in Metairie with one shingle layer and a straightforward gable commonly lands in the $12,000 to $17,000 range for an exposed-fastener retrofit. The same footprint with standing seam and a chimney re-flash runs higher. We give you the number after the inspection, not a phone guess.

Metal Roof Over Shingles (Retrofit) Near Me: How to Vet a Contractor in New Orleans

Roofing is one of the trades where the cheapest bid and the best bid are rarely the same company. Then call the references and ask whether the roof leaked after the first heavy summer storm.

• Confirm the contractor is licensed and insured for roofing work in Louisiana and ask for the certificate in writing.
• Get two or three written estimates that list deck inspection, underlayment, flashing, and disposal as separate line items.
• Ask how they handle permits with the local building department, since requirements vary by jurisdiction and historic districts add design review.
• Check HOA and historic district rules before you pick a panel profile or color, because some blocks restrict both.
• Ask what happens if they find soft decking and get the per-sheet repair price in the contract, not after the fact.

A contractor who cannot answer those five questions clearly is not the one you want over your shingles.

Ready to schedule an inspection? Reach out through our contact page and we will set a time that works around your schedule.

Metal Roof Over Shingles (Retrofit) in New Orleans: Pricing Guide

Indicative pricing, the exact cost depends on square footage, finish, and site access. Free personalized estimate within 24h at (504) 636-6074.