Flat Roofing in New Orleans: Installation, Repair and Drainage
- Your flat roof installed correctly for lasting protection
- Flashing and edges finished so your flat roof stays watertight
- A consultation and personalized quote for your project
- Residential License # 890459
- Commercial License # 3667
Flat roofing in New Orleans has one job above all others: getting heavy rain off the roof before it finds a way in. TurnKey Roofing Contractor installs and repairs flat and low-slope roofs on homes and commercial buildings, choosing the membrane, insulation and drainage details that suit each building.
Call (504) 608-3921 or request a free flat roofing estimate. We'll look at the roof surface, drains and edges, explain your options and give you a personalized quote before any work begins.
What Counts as a Flat Roof
A flat roof isn't truly flat. It has a slight pitch that moves water toward drains, scuppers or gutters, and it's covered with a continuous membrane in place of overlapping shingles or tiles. Shingles need a steeper slope to shed water, so low-slope sections need a different system.
Flat roofs show up on more buildings than most people notice:
- Offices, warehouses, retail stores and apartment buildings
- Porch roofs and rear additions on older houses
- Garages, carports and covered patios
- Modern homes designed with low rooflines
- Roof areas that carry HVAC units, solar panels or other equipment
A flat roof adds usable space: it can hold mechanical equipment out of sight, and it costs less to build and maintain than a pitched roof of the same size.
Flat Roofing Materials Compared
Several membranes work on low-slope roofs. Each one handles heat, water and foot traffic a little differently.
| Material | How it's built | Strengths | Watch for |
|---|---|---|---|
| Built-up roofing (BUR) | Several plies of felt set in asphalt, topped with gravel or a cap sheet | Thick, durable, handles foot traffic | Heavy, labor-intensive installation |
| Modified bitumen (torch-down) | Polymer-modified asphalt sheets, heat-fused at the seams | Easy to patch, performs well in heat | Punctures, and seam care at installation |
| EPDM rubber | A synthetic rubber membrane in large sheets | Flexible, weather resistant, few seams | Punctures from sharp objects, seam adhesive aging |
| TPO | A white thermoplastic membrane with heat-welded seams | Reflects sun, strong welded seams | Punctures if not installed and protected properly |
| PVC | A thermoplastic membrane with heat-welded seams | Resists chemicals and grease, low maintenance | Punctures, higher upfront cost |
The right choice depends on how the roof is used. A roof with regular foot traffic from service crews favors a thick, tough surface like built-up or modified bitumen. A roof where cooling costs matter most favors a white, reflective membrane. A small porch or addition roof often comes down to what ties in cleanly with the rest of the house.
Each system has a dedicated page with more detail. Built-up roofing suits heavy-use commercial roofs. Torch-down roofing covers modified bitumen. Rubber roofing explains EPDM. Single-ply roofing covers TPO and PVC. For a planted roof, see green roofing.
Drainage Keeps a Flat Roof Dry
Water that sits on a flat roof for days works into seams, breaks down membranes and adds weight to the structure. New Orleans downpours make drainage the first priority on any flat roof.
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Ponding Water
Low spots form where the deck has sagged or insulation has compressed. Water collects there after every rain, and the constant wet-dry cycle wears out the membrane in that spot first.
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Drains, Scuppers and Gutters
Interior drains, wall scuppers and edge gutters carry water off the roof. Leaves, gravel and debris clog them quickly, and a single blocked drain can flood a whole section of roof.
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Tapered Insulation
Tapered insulation boards add slope where the structure doesn't have enough. Installed under a new membrane, they steer water toward the drains and fix ponding at its source.
Flat Roof Repair in New Orleans
On a flat roof, water can travel under the membrane before it drips inside, so the stain on your ceiling may sit well away from the actual opening. These are the common flat roof problems we repair:
- Blisters and bubbles where moisture is trapped under the surface
- Split or separated seams between membrane sheets
- Punctures from dropped tools, foot traffic or storm debris
- Cracked or loose flashing at walls, curbs and rooftop units
- Clogged drains and areas of standing water
- Worn coatings and exposed membrane on sun-baked roofs
Our roof leak detection service finds where the water is getting in. Business owners can turn to our commercial roof repairs service. A repair makes sense when the damage is limited and the rest of the membrane is sound, while widespread wear points to a new roof. In some cases a worn but dry roof can take a restoration coating that buys more years of service before a full tear-off.
Our Flat Roof Installation Process
A flat roof depends on every layer below the surface, so each step gets the same attention as the membrane itself.
- Assess the roof and handle permits. We look at the existing structure, drainage and edges, talk through your needs and preferences, and pull the permits the job requires.
- Prepare the deck. The old roofing comes off, and damaged decking is repaired or reinforced so the new system starts on a solid base.
- Install insulation. Insulation boards go down to improve thermal performance, with tapered sections wherever water has been ponding.
- Install the membrane. The chosen membrane is adhered or mechanically fastened to the deck, with seams sealed, welded or fused for its system.
- Flash the edges and penetrations. Flashing goes around vents, pipes, curbs and walls, and the roof edge is finished to keep water out.
- Inspect and clean up. We check the seams and flashing details on the finished roof, then clean up the work area.
Insulation does more on a flat roof than it does under shingles, since there's often no attic to buffer the heat. Our roofing insulation page explains how it lowers cooling costs.
Keeping a Flat Roof in Good Shape
A few simple habits prevent most flat roof leaks and extend the life of the membrane.
- Schedule an inspection each year and after tropical storms
- Clear leaves, branches and trash so drains stay open
- Trim overhanging branches that can scrape or puncture the surface
- Keep gutters and downspouts free of debris
- Deal with stains, drips or blisters as soon as you see them
A reflective roof coating can renew a worn surface and keep the roof cooler through the summer.
What Affects the Cost of a Flat Roof
Flat roof pricing comes from seeing the roof, since drainage and deck condition vary so much from one building to the next. These factors shape your estimate:
- Roof size and how many drains, curbs and penetrations it has
- The membrane you choose
- Tear-off of the old roof and any deck repairs underneath
- Insulation, tapered slope and drainage upgrades
- Rooftop equipment that has to be worked around or raised
For commercial buildings, see our commercial roofing services. On houses, a flat porch or addition roof often gets done along with the main roof, and our residential roofing services cover both.
Flat Roofing FAQs
Estimates are free
- Residential License # 890459
- Commercial License # 3667
How long does a flat roof last?
It depends on the membrane, the quality of the installation, the drainage and the maintenance. A flat roof that drains well and gets regular inspections lasts much longer than one with standing water.
Are flat roofs prone to leaking?
Flat roofs are more vulnerable to leaks than pitched roofs because water moves off them slowly. Proper installation, good drainage and regular inspections keep that risk low.
Can I install solar panels on a flat roof?
Yes. Flat roofs are well suited to solar panels, as long as the structure can carry the added weight and the mounts are flashed correctly so they don't leak.
How much does a flat roof cost?
The price depends on roof size, the membrane, deck condition and drainage work. A free estimate gives you an exact number for your building.
Do flat roofs need maintenance?
Yes. Clearing debris, keeping drains open, inspecting the roof each year and fixing small problems quickly all help a flat roof last.
Get a Free Flat Roofing Estimate in New Orleans
Call (504) 608-3921 or book your free estimate online. We work under Residential License # 890459 and Commercial License # 3667, and our Unlimited Wind Warranty covers wind damage regardless of wind speed.