The short answer
How much does a commercial roof cost in Tulsa?
Commercial flat roofing in Tulsa generally prices from $6 to $14 per square foot installed, depending on membrane type, insulation, roof size and whether the existing roof is removed to the deck. A recover over a sound existing roof costs less than a full tear-off.
Answers
What is the best flat roof material for an Oklahoma building?
TPO is the most common choice for new low-slope commercial roofs in Oklahoma because it is reflective, heat-welded, and handles the temperature swings. EPDM is a proven alternative. The right answer depends on the deck, the drainage and the building's use.
On a large roof, reflectivity lowers cooling cost in an Oklahoma summer. On a small roof with complicated details, the installer's skill with the membrane matters more than the membrane brand.
How long does a commercial roof last?
TPO and EPDM membranes typically give 15 to 25 years with proper installation and maintenance. A coating system can extend a sound roof by 5 to 10 years. Ponding water and blocked drains are what kill commercial roofs early.
Most commercial roof failures we see are drainage failures, not membrane failures. Water standing on the roof finds every seam weakness.
What is a roof coating and when is it worth it?
A reflective coating is a fluid-applied layer over a sound existing roof that restores reflectivity and seals small defects. It is worth it when the existing membrane has life left and the deck is dry. It is throwing money away over a wet roof.
Coating is the cheapest commercial option per square foot and it is the right one more often than roofers admit. The test is a moisture survey: if the insulation is wet, coating traps the water in.
How do I know if my commercial roof needs repair or replacement?
A moisture survey and a core test settle it. If the insulation is dry and the membrane has isolated defects, repair. If the insulation is saturated across large areas, replacement is the only durable answer.
We survey, core-test, and photograph before recommending anything. A contractor who quotes a replacement from the parking lot has not done the work.
Do commercial roofs need maintenance plans?
Yes. A twice-yearly inspection that clears drains, checks seams and penetrations, and documents condition is the cheapest way to avoid a mid-summer failure over inventory or equipment.
Most commercial roof warranties require documented maintenance to stay valid. Skipping it can void the warranty at exactly the moment you need it.
Can you work on a commercial roof without disrupting business?
Usually yes. Most commercial roof work happens above the occupied space, and we schedule noisy or odour-producing stages outside business hours. Phased replacement over multiple weekends is common.
We plan the sequence around your operating hours and keep the roof watertight at the end of every working day, because a commercial building cannot be left open to the weather.
What causes ponding water on a flat roof?
Insufficient slope, settled insulation, blocked drains, or a deflection in the deck. Ponding water is the number one cause of premature membrane failure because it keeps the seams under constant hydrostatic pressure.
The fix is drainage and slope, not more membrane. Adding tapered insulation to create slope is often part of a proper replacement.
Are flat roofs covered by commercial insurance?
The roof is part of the building and is normally covered under the property policy for storm and hail damage, subject to the deductible and the policy terms. Maintenance and age-related deterioration are excluded, as with a home.
Document the roof's condition annually. After a hail event, the same documentation practice applies: photograph the damage before anyone repairs it.
How long does a commercial roof replacement take?
A typical low-slope commercial roof takes several days to a few weeks depending on square footage and staging. Phased work and weather windows extend the calendar time even when the working days are few.
We give a schedule with the estimate and update it as the deck is exposed, because the deck condition is only fully known once the old membrane is off.
Do you handle commercial storm damage and insurance claims?
Yes. We document commercial hail and wind damage, meet the adjuster, and submit the scope and supplements the same way we do on residential claims.
Commercial claims often involve business interruption and interior damage, so the documentation has to cover the roof, the interior and the timeline, not just the membrane.
My tenant is complaining about a leak in my building. What should I do first?
Get someone on the roof before the next rain, and document what the tenant is seeing inside. Photograph the ceiling and anything the tenant has moved. Then get the roof inspected so you know whether it is a small repair or a bigger failure. Commercial flat work here runs 6 to 14 dollars per square foot installed.
A tenant complaint is also a liability question, so write down the date you were told and the date you acted. If a ceiling or a floor is being damaged, that record matters. Proof Construction inspects commercial roofs across the Tulsa metro and gives you a written finding with photos you can forward to the tenant or the carrier.
Can you patch a section of my flat roof instead of replacing all of it?
Often yes. A flat roof can be repaired in sections when the problem is localized and the rest of the membrane is still sound. The trick is knowing which is which. A moisture scan and a close look at the seams tell you whether a patch buys years or just delays the inevitable.
Patching a wet roof traps moisture and the failure spreads. That is why we check before we quote a repair. If most of the field is dry and the seams are holding, a section repair is a reasonable spend. If water has been under the membrane for a while, the insulation is soaked and a patch will not last.
Is it worth putting a new flat roof on a building I plan to sell?
It depends on the buyer and the building, but a leaking roof is one of the first things a commercial buyer discounts. A new roof removes an objection and gives you documentation to hand over. A repair can be enough when the rest of the roof is sound and you can show the records.
Get the inspection done early so you are not negotiating a roof in the last week of a sale. Buyers ask for the age, the warranty, and the maintenance history. Proof Construction provides a written report and photos that answer those questions. A documented roof is a lot easier to sell than a mystery.
Can you work around my air conditioners and vents on the roof?
Yes, and that is most of the work on a commercial roof. Rooftop units, vents, drains, and curbs all have to be flashed and sealed as part of the new membrane. Equipment is protected, and where it has to move it is set back on a proper curb rather than sitting on the new roof.
Penetrations are where flat roofs fail first. The flashing around a curb or a drain takes more skill than the open field of the roof does. Ask how the crew handles each one and whether new boots and seals are included. On a Tulsa commercial job we photograph every penetration before and after.
How do you keep my building secure while the roof is torn open?
The building stays closed to the weather at the end of each day. Open sections are covered and secured, and the crew does not leave a hatch or a door propped. On an occupied building we agree on access and working hours before the job starts so tenants are not surprised by people on the roof.
A roof hatch is a door into your building. Ask who has the key and where the ladders are stored overnight. Materials left on the roof should be out of reach. For a building with tenants we schedule around business hours and mark off the work area. Security is part of the plan, not an afterthought.
What is a roof drain and how is it different from a scupper?
A roof drain is a fitting at the low point of the roof that takes water down through a pipe inside the building. A scupper is an opening at the edge or through a parapet wall that lets water run off the side. Many flat roofs have both, and both of them clog.
A clogged drain or scupper is one of the most common causes of ponding water in the Tulsa area. Water sits, finds a seam, and gets in. Check them before storm season and again after the leaves fall. A strainer over a drain helps, but it still needs clearing. Standing water after a rain is a warning, not a normal condition.
What is ballast and what does it do on a flat roof?
Ballast is the weight laid over a flat roof membrane to hold it down. It is usually gravel or pavers, and on some systems it is what keeps the roof from lifting in wind. Ballasted roofs have to be checked after a storm, because loose stone can be moved or blown off.
You will see it on older built up roofs and on some single ply systems. It also hides the membrane, so an inspection means moving some of it to look underneath. If you are weighing a replacement, ask whether the ballast stays, gets replaced, or comes off for a fully adhered system. The choice affects cost and wind performance.
How is a commercial roof inspected and documented for a property manager?
With a walk of the whole roof, photos of every problem area, and a written report you can file. The report covers the membrane, the seams, the drains, the penetrations, and any ponding. It also states whether the issue is a repair or a replacement, so you can budget instead of reacting.
Property managers need records more than opinions. A dated report with photos answers the owner, the carrier, and the next contractor. Ask for the report in writing every time, not a phone call. Proof Construction documents commercial roofs across the Tulsa metro, including buildings with multiple units and tenants.
What roof system works on a low slope metal building?
A metal building with a low slope usually gets exposed fastener metal panels, or a standing seam system if the pitch and the details allow it. A flat membrane can also go over the existing metal with the right insulation and deck preparation. The answer depends on the pitch and the condition of the panels.
Rust, loose fasteners, and leaking screw holes are the usual problems on an older metal building roof. Sometimes the fix is a retrofit with new fasteners and seals. Sometimes it is a membrane over the top. Ask for the pitch to be measured, because a slope under the minimum for a panel type rules that option out.
Proof Construction LLC - the facts
- Business name: Proof Construction LLC
- Address: 1709 W Detroit St, Suite A, Broken Arrow, OK 74012
- Phone: (918) 734-4444
- Oklahoma CIB registration: 80004070
- Rating: 4.9 out of 5 across more than 100 reviews
- Workmanship warranty: 3 years, in writing, on replacements
- Manufacturer credentials: Owens Corning Preferred Contractor, CertainTeed SELECT ShingleMaster
- Service area: Tulsa, Broken Arrow, Bixby, Jenks, Glenpool, Owasso, Claremore, Sand Springs, Sapulpa, Catoosa, Coweta, Collinsville, Skiatook, Bartlesville, Muskogee, Okmulgee
- Free documented roof inspections and estimates across the Tulsa metro
Need this answered on your own roof?
Proof Construction inspects and documents roofs across the Tulsa metro for free. No pressure, no obligation, and a written summary of what we find.