Rosalea McIntosh
Had a small roof leak after a heavy rain event, but they were able to come the next day for the repair. Polite, on time, quick work. They showed me before/after pics and explained what happened. Very very reasonable.
Residential Flat & Low-Slope Roofing on the Mississippi Gulf Coast
Gulf South Roofing installs membrane systems on the porches, dormers and additions where shingles are not allowed — the same crew that handles the rest of your roof, from its Gulfport office.
- The section shingles can’t protect
- Same crew as your main roof
- Sealed transitions, in writing
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Residential Flat & Low-Slope Roofing on the Mississippi Gulf Coast
Gulf South Roofing installs and repairs low-slope roofing on Gulf Coast homes from its Gulfport office. Shingle manufacturers prohibit their product below a minimum pitch, so porches, dormers and additions need a membrane system built for slow-draining water. On homes that system is modified bitumen eight times out of ten, with TPO where a larger, cleaner deck calls for it. We install it with the same crew that handles your shingle or metal field, and detail the transition where most low-slope leaks actually start.
The problem
Why shingles fail on a low-slope section
Many older Gulf Coast homes carry at least one section below the pitch shingle manufacturers allow. Shingles shed water; they do not hold it out. Below the minimum pitch, water sits, creeps sideways under the courses, and finds the deck — which is why that one section has leaked through three repair attempts.
In the order it happens on your roof
Six stages
Pitch assessment
We measure the actual slope. If the section is below shingle minimum, no shingle repair will ever hold — and we show you the number rather than asking you to take it on faith.
The right membrane for a home
Modified bitumen on most homes — multi-ply asphalt that stands up to foot traffic and coastal heat. TPO where a larger, cleaner deck calls for a welded single-ply. Chosen by the section, not by what is on the truck.
The transition detail
Where the membrane meets the shingle or metal field is where residential low-slope leaks live. We flash and counter-flash that joint as one assembly, by one crew.
Drainage that actually drains
Low-slope still needs a path off the roof. Scuppers, edge metal and tapered buildup where ponding has been the problem.
Deck repair before covering
Years of slow leaking usually means soft decking. It gets replaced before the membrane goes down, photographed before and after.
Tied into your roof’s warranty
One contractor across the whole roof means one written workmanship warranty — no finger-pointing at the seam between two companies’ work.
How we work
Residential low-slope roofing in Gulfport and across the Gulf Coast
Why does my porch or addition keep leaking?
Almost always: shingles installed below the pitch they are designed for. The fix is not better shingles — it is a membrane system built for standing water.
- Education first: You see the pitch measurement and the manufacturer minimum side by side.
- Cause, not symptom: A membrane ends the leak cycle that shingle patches restart every winter.
- Older homes especially: Coastal additions and enclosed porches were often built under the minimum pitch.
Track record
Low-slope on homes, in numbers
- 2Membrane families for homes
- 1013+Projects completed since 2019
- 1Crew across your whole roof
- 3–10Year workmanship warranty
Sections and transitions, done right
What to expect
How a residential low-slope project works
Free inspection
Same weekA project manager measures the pitch, photographs the section and the transition, and finds where the water is actually getting in.
You receiveThe pitch measurement and photographed findingsThe honest explanation
Same visitWhy the section leaks, what the manufacturer minimum is, and whether a repair or a membrane is the right fix — with the reasoning, not a pitch.
You receiveA straight recommendation you can verifyWritten estimate
1–2 daysA line-item estimate for the section — membrane, transition detail, deck repair if the photographs found soft decking.
You receiveA section-sized price in writingInstall and closeout
Usually 1 dayMembrane down, transition flashed, edge metal set, site cleaned. The project manager walks it with you before closing out.
You receiveWarranty documents and after photos
What homeowners say
John Atherton
Gulf South Roofing did a terrific job on our home and we would recommend them to other homeowners without reservation. Jacob and Joey took great care with our landscaping and yard during the installation. 100% satisfied and then some.
Taylor Hughes
The crew was professional, on time, and kept the area clean throughout the project. Joey explained everything clearly and made the process completely stress-free.
Residential flat roof FAQs — Gulfport & the Mississippi Gulf Coast
Why can’t I just put shingles back on my porch roof?
Shingle manufacturers prohibit their product below a minimum pitch, and Mississippi building code does not allow it either — low-slope roofs hold water instead of shedding it.
Shingles work by overlapping and draining. Below the minimum pitch, water sits, wicks sideways under the courses and into the deck. That is why the section has leaked through every shingle repair, why every shingle warranty excludes low-slope installation, and why the state code requirement rules it out: a permitted re-roof of that section has to be a membrane system.
Which is better for a house — modified bitumen or TPO?
On a house it is usually modified bitumen — eight of ten low-slope sections we build on homes get it, because it takes foot traffic and suits the size of the section. TPO earns its place on the occasional larger, cleaner deck. The section decides, not a preference.
Both carry manufacturer warranties when installed to specification. Your estimate names the one we would put on our own porch in your situation, with the reasoning attached.
How much does a residential flat roof section cost?
It depends on the section’s size, deck condition and the membrane — the free estimate prices your actual section, line by line.
A section gets a section-sized price. We do not publish one-size numbers because they mislead in both directions, and we do not scale commercial systems onto porches to raise the ticket.
Do I need to replace my whole roof to fix the flat part?
No. The low-slope section can be rebuilt on its own, tied into your existing shingle or metal field with a properly flashed transition.
If the rest of the roof is near end of life anyway, we will tell you — doing both at once saves mobilization and puts one warranty over everything. But that is your call, made with the photographs in front of you.
How long does a residential membrane last?
Properly installed, 15 to 30 years depending on the membrane, drainage and sun exposure.
Ponding water and unflashed transitions are what shorten low-slope life on homes. Both are addressed in the installation rather than left for maintenance to catch.
Where do you do residential flat roofing?
Across Hancock, Harrison and Jackson counties from our Gulfport office at 2811 26th Avenue.
That includes Gulfport, Biloxi, Long Beach, Pass Christian, D’Iberville, Diamondhead, Bay St. Louis, Waveland, Ocean Springs, Pascagoula, Moss Point and St. Martin. Commercial flat roofing has its own page.
Reviewed by the Gulf South Roofing team · Last updated 2026-08-23
Get a free low-slope estimate in Gulfport
Gulf South Roofing will measure the pitch, show you why the section leaks, and price the honest fix — in writing, with no pressure.
Gulf South Roofing · 2811 26th Avenue, Gulfport, MS 39501(228) 231-1630 · gulfsouthroofs@gmail.com