How Much Does a Flat Roof Cost in Texas? 2026 Low-Slope Ranges

Get a no-obligation flat-roof ballpark in seconds: no name, no email required. Enter your flat-section square footage and see an installed range instantly. A free on-site assessment then turns that ballpark into an exact, written figure for your roof.

A flat roof in Texas typically runs $6.00 to $8.00 per square foot of roof area installed, whether the system is modified bitumen or built-up. Your total depends on the size of the low-slope section, rooftop access, and whether drainage needs correcting.

This page prices ARP's residential flat and low-slope roofing systems by system and by section, so you can size the job before anyone walks your roof.

Because the replacement price is per square foot of actual roof area, a small patio cover is a modest number while a whole-home low-slope roof is not. To sketch your own total before we visit, run the numbers in the roof replacement calculator.

Updated July 2026, Texas residential low-slope pricing. Ranges assume full tear-off, drainage correction where needed, new flashing, and permit.

Here is the number people most often get wrong on a flat roof: a repair is not a smaller version of a replacement. When your low-slope roof has a single leak, an open seam, or a failed pipe flashing, that is a flat-priced fix from $150 to $1,500, quoted per job. Do not take a repair price and multiply it by your square footage, and do not take the $6.00 to $8.00 per-foot replacement rate and apply it to a small patch. They answer two different questions. If a section is failing but the rest of the roof has life left, start on the flat-roof repair page, not here.

Five things decide where you land inside the $6.00 to $8.00 band. None of them are guesswork once someone is standing on your roof.

Rooftop access. If your low-slope roof sits behind a two-story wall, over a courtyard, or anywhere a crew cannot stage materials from the ground, the labor line climbs. Flat systems are hauled up in heavy rolls or hot, and hand-carrying base and cap plies across a house adds hours. Easy driveway access keeps you at the low end of the band.

Number of tear-off layers. How many old layers have to come off changes the number more than almost anything else. One worn cap sheet peels fast. Two or three stacked systems, or a gravel build-up that has to be scraped and hauled, add disposal weight and labor. If a prior roofer went over the top instead of tearing off, you inherit that cost now.

Drainage and tapered insulation for ponding. A flat roof is never truly flat; it needs slope to drain. If water stands on yours for more than a day or two after rain, correcting it with tapered insulation or a rebuilt slope is part of doing the job right, and it adds material and labor. Skipping it is the single most common reason a cheap flat roof fails early.

Size of the low-slope section. Because the price is per square foot of roof area, the size of the actual flat section drives the total. A small patio cover or a room addition is a modest number. A whole-home low-slope roof, or a large flat section spanning a garage and living space, moves you up quickly even at the same per-foot rate.

Penetrations and flashing count. Every pipe, vent, skylight, curb, and wall transition is a place water wants in, and each one needs its own flashing detail. A clean, open flat roof with two penetrations prices lower than the same square footage broken up by a dozen. On a flat roof, the details are the roof, so the flashing count matters.

A real flat-roof number comes from a real walkthrough, and the written estimate you get from ARP names every line so nothing turns into a surprise on install day. On a full low-slope replacement, your price includes:

• Full tear-off of the failed low-slope system down to the deck
• Deck inspection with photos, and replacement of any wet or rotted decking shown to you before it is covered
• Drainage correction and tapered insulation wherever ponding is found
• New base and cap plies, or a gravel-surfaced build-up, installed to manufacturer specification
• New flashing at every penetration, wall, and roof edge
• Building permit pulled in your jurisdiction
• Site cleanup and debris haul-off
• Manufacturer warranty registration plus a Limited Lifetime* workmanship warranty

As a GAF Certified Plus and Atlas PRO+ Platinum Select contractor, ARP writes the scope in plain language before any work starts, and the install crew we deploy and supervise builds to that scope under a project manager's eye.

Somebody's going to be the most expensive quote you get. Sometimes that's us. Here's the difference — we'll show you exactly what you're paying for and why it matters.

If you are holding a flat-roof quote thousands of dollars under the rest, read the scope, not just the total. The cheap version usually leaves out the drainage correction, reuses old flashing, or goes over the existing layers instead of tearing off. Same dollar figure, very different roof.

We are a great fit if you:

• Want the drainage and flashing done right, not skipped to hit a lower number
• Want everything documented and in writing before work starts
• Want a warranty you can actually use, backed by the company that installed it
• Are planning to stay in the home and want the low-slope section to last

We are probably not the right fit if you:

• Want a firm repair price over the phone: we quote repairs after an on-roof inspection, not before.
• Are choosing purely on the lowest bid
• Need someone to start tomorrow

If you are here because water is getting in or standing on the roof, pricing is the second question, not the first. Figure out what is actually failing before you decide what it costs. Our flat-roof problems guide walks the common failure points, and the flat-roof repair page covers the fixes and their flat-priced ranges. Come back here once you know whether you are pricing a patch or a full low-slope replacement.

Book a free on-site inspection and you will get a written flat-roof estimate that names every line, so you know exactly what you are buying before you sign anything.

Get My Flat-Roof Quote →

Financing available. Ask about your options at the inspection.

Limited Lifetime workmanship warranty is subject to manufacturer terms. Coverage may be prorated after a defined period. See product warranty documentation for full details.