Commercial Roof Replacement Cost in DFW

Low-slope warehouse roof in Dallas–Fort Worth partly torn off down to the metal deck during a commercial reroof

Commercial roof replacement cost in DFW depends less on the membrane than on what sits under and around it: wet or dry insulation, tear-off versus recover, the energy code your city enforces, drainage fixes and phasing around tenants. This guide explains each driver so you can compare bids line by line, not by the bottom number.

Every commercial roof is a one-off, which is why we do not publish a price per square foot for commercial work, and why you should be cautious of anyone who quotes one before walking the roof. What we can do is show you exactly what moves the number, so the bid you get from us or anyone else makes sense. If you also need help with the building beyond the budget, start with our overview of commercial roofing in Irving and DFW.

Why One Price per Square Foot Rarely Holds Up

A quoted rate per square foot assumes a clean, dry, rectangular roof with nothing on it. Real Dallas–Fort Worth buildings have parapets, expansion joints, curbs, gas lines and sometimes two older roofs stacked on the deck. The membrane is often a smaller share of the job than owners expect.

The other variable is what nobody can see from the ground: moisture. A roof that looks fine from a ladder can hide saturated insulation that has to come out. Until someone cores the roof or runs a moisture survey, any budget is a guess.

What Drives Commercial Roof Replacement Cost in DFW?

These are the line items that move a bid the most on the buildings we look at around the Metroplex:

Roof system and thickness. A thicker single-ply sheet, a multi-ply modified bitumen roof and a coating restoration are three different price tiers before any other factor.
Attachment method. Mechanically fastened, fully adhered and ballasted systems use different labor and materials, and the deck and wind design decide which is allowed.
Tear-off depth. One layer comes off faster than two; wet insulation adds disposal weight and replacement material.
Insulation required by code. A full replacement can trigger an energy-code upgrade, covered below.
Drainage corrections. Tapered insulation, crickets, new drain bodies or added scuppers fix ponding but add material and labor.
Penetrations and rooftop equipment. Each HVAC curb, vent, pipe and pitch pan is a detail that has to be flashed by hand.
Access and logistics. Crane time, building height, a tight lot and open storefronts all change crew productivity.
Deck repairs. Rusted metal deck or soft wood deck found during tear-off is usually priced as a unit cost in the contract.

Core sample cut from a flat commercial roof showing membrane, cover board and damp polyiso insulation layers — A small core cut shows each layer of a low-slope roof and whether the insulation below the membrane is dry.

Tear-Off or Recover: Which Commercial Reroof Budget Fits?

A recover installs a new roof over the existing one, usually with a cover board in between. It avoids most tear-off and disposal labor, which is why owners ask about it first. The International Building Code limits when it is allowed: a new roof covering cannot go over a roof that is water-soaked or deteriorated, and it cannot be added when the building already has two roof coverings. In practice the deciding question is how much of the insulation is wet. A recover over wet insulation traps that moisture, and blisters, rust and failed fasteners follow.

One more thing to watch on a roof recover cost comparison: many commercial quotes fold tear-off and disposal into the labor line instead of listing them. Ask each bidder to break out removal, haul-off and dumpster or trailer pulls, because a flat roof replacement cost that looks low may simply assume fewer layers or less wet material than the building actually holds.

So the comparison is not simply recover cost versus tear-off cost. It is a recover plus the removal of every wet section, measured against a full tear-off that resets the roof to the deck. Our commercial roof replacement page explains how we survey a roof before recommending either path.

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How the Energy Code Changes an Irving or Dallas Budget

When a low-slope roof with insulation entirely above the deck is replaced, the International Energy Conservation Code generally requires the new assembly to meet the current insulation level for the climate zone. Dallas County sits in climate zone 3A. On older buildings that were insulated lightly, or not at all, this can mean adding several inches of polyiso and taller edge metal and curbs to match, which is a real cost driver that a bare membrane price hides.

Irving adds a reflectance rule. Under the city's Chapter 8B amendments, low-slope cool roofs must reach a Solar Reflectance Index of at least 78. White single-ply membranes and many white coatings are designed for this; a dark granulated cap sheet typically is not. Before locking in a product, call Irving's Inspections Department, (972) 721-2371, to confirm the code edition and any exceptions. For buildings across the line, the City of Dallas enforces its own adopted codes, so we check with that building department for projects we bid in Dallas.

TPO Roof Cost per Square Foot: What the Rate Hides

When owners compare TPO roof cost per square foot between bids, these are the details that make two numbers different jobs:

Bid detail	What changes the price	What to ask for in writing
Membrane thickness	45, 60 and 80 mil sheets differ in material cost and puncture resistance	The exact thickness and product line
Attachment	Adhered systems use bonding adhesive and more labor than fastened ones	Attachment method and fastener pattern
Insulation	Code-required R-value can mean multiple layers	Total R-value and number of layers
Cover board	Adds hail and foot-traffic resistance	Board type and thickness, or "none"
Edge and coping metal	Taller insulation stacks need new, taller metal	Gauge, finish and linear feet
Wet-area replacement	Unknown until cores or a survey are done	Unit price per square foot of wet insulation
Rooftop units	Curbs may need raising to keep flashing height	Number of curbs and who disconnects the units

A missing cover board or an unpriced wet-area allowance is often where two "identical" quotes split apart.

Tapered insulation panels fanned around a roof drain during a low-slope commercial reroof in North Texas — Tapered insulation boards laid in a diamond pattern to steer water toward a roof drain.

What We See When Pricing DFW Commercial Reroofs

The surprises on commercial jobs around Irving tend to repeat. Rooftop units sit on curbs that are too short once new insulation goes down, so the HVAC contractor has to be scheduled to lift them. Drains sit at high spots because the original structure deflected over the years, and water ponds beside them. Older strip centers carry a second roof that nobody on the current management team knew about until we cut a core.

We also find hail damage owners never claimed: North Texas hail can crush insulation under a membrane without tearing the surface, showing up only as soft spots underfoot or in a core. Know that before budgeting a replacement out of pocket.

Rooftop HVAC unit curb wrapped with new white membrane flashing on a Dallas-area commercial roof — Raising and reflashing rooftop unit curbs is often a separate line on a commercial reroof bid.

A Commercial Reroof Budget Checklist

Before you approve a scope, make sure you have:

Roof area measured, with each roof level listed separately
Core cuts or a moisture survey showing where insulation is wet
The number of existing roof layers confirmed
The system, thickness, attachment and insulation R-value spelled out
Drainage fixes drawn or described (crickets, sumps, drains, scuppers)
Unit prices for deck repair and extra wet insulation
Permit, code edition and reflectance requirement confirmed with the city
A phasing and tenant-access plan, if the building stays open
Written workmanship terms and the manufacturer's material warranty

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Getting a Number You Can Trust

A sound commercial reroof budget starts with a roof walk, a few cores and a clear scope, not a rate pulled from a website. We provide free inspections and free estimates for commercial buildings across the Metroplex, document what we find with photos, and write the scope line by line so you can compare it. Owners and property managers from Las Colinas to Dallas call on our roofing contractor in Irving, TX crew for this. Call us at (725) 745-8803 to schedule a walk of your roof.

Questions readers ask

Why do two commercial reroof bids for the same building differ so much?

Usually because they price different scopes. One bid may assume the existing insulation is dry and recover over it, while another includes a tear-off, new insulation to meet the energy code and tapered crickets at the drains. Ask each contractor to list the system, thickness, attachment method, insulation R-value, drainage work and how wet areas were identified, then compare those lines rather than the totals.

Does a commercial roof replacement in Irving need a permit?

Yes. The City of Irving requires a permit for a re-roof, and commercial work is reviewed against the city's adopted building and energy codes with its local amendments. Irving's Inspections Department can be reached at (972) 721-2371 to confirm the current fee, the code edition in force and whether your building's scope triggers added insulation or cool-roof requirements.

Can phasing a commercial reroof lower the total cost?

Phasing spreads cash flow and keeps tenants open, but it rarely lowers the total. Each phase adds mobilization, temporary tie-ins between old and new roof, and more days of crane or hoist time. It makes the most sense when part of the roof is clearly worse, or when budgets run by fiscal year. We can lay out a phased and a single-phase scope side by side.

Is a roof recover always cheaper than a full commercial tear-off?

Not always. A recover skips most removal and disposal, but only where the insulation is dry and the building has one existing roof. Once cores show wet sections, those areas have to come out anyway, and the new edge metal, curb heights and code insulation still apply. On a roof with widespread moisture, a recover plus spot removals can approach the cost of a tear-off while leaving older layers in place.

Sources

City of Irving — Inspections and building permits

Written by the RJ Premium Roofing team, a bilingual roofing contractor based in Irving, TX. We inspect, repair and replace roofs across Dallas–Fort Worth and document storm damage for homeowners’ insurance claims.