5 Star Residential and Commercial Roofing
Commercial TPO Roof Retrofit in Amarillo, TX
Quick Summary
- •What this page covers: recovering an existing failing low-slope roof with a new TPO membrane in Amarillo, instead of tearing the old system off. One service, not a services overview.
- •The gate: code generally blocks a recover if the existing roof is water-soaked or deteriorated, or if the building already carries two roof coverings. A moisture survey settles it.
- •Why owners choose it: no tear-off, no disposal, no day where the building is open to weather, and staff keep working underneath.
- •Next step: free retrofit assessment including a core cut. Call (806) 622-6041 or use the contact form on this page.
What a TPO Retrofit Is, and When It Beats a Tear-Off
A retrofit, which the trade also calls a recover, installs a new TPO single-ply membrane over the roof you already have, rather than stripping the building back to deck first. On most Amarillo commercial buildings that means new insulation or a coverboard laid over the existing surface, new fastening engineered for Panhandle wind, and a fully heat-welded TPO sheet on top. The old assembly stays where it is and becomes part of the thermal package.
This page is for the owner who already has a low-slope roof that is leaking, chalking or past its warranty, and wants to know one specific thing: can I put TPO over it, or am I paying for a tear-off? The honest answer depends on what is under the surface, and nobody can tell you from the parking lot. Eleven years in, we still cut a core before we quote a recover.
Can TPO Go Over Your Existing Roof?
Building codes treat a recover as a privilege, not a default. Four findings will disqualify your roof and push the project to a full replacement, and it is cheaper to find them now than after the material is on site.
Wet insulation below the surface
Water trapped in the existing assembly does not dry out under a new membrane. It keeps rotting the deck and voids the manufacturer warranty on the new system. An infrared or capacitance moisture survey maps the wet areas. Small isolated zones can be cut out and replaced; widespread saturation ends the retrofit conversation.
Two roof coverings already in place
Code generally stops at two applications. If a previous owner already recovered once, a third layer is not permitted, and the core cut is what proves how many layers you actually have. On older Amarillo retail and warehouse stock this is the most common disqualifier we find.
A deck that will not hold fasteners
A retrofit is only as good as its attachment. We pull test fasteners to confirm the deck can hold the uplift resistance the assembly needs. At 3,600 feet with an annual average wind of 14.3 mph and spring gusts well above that, uplift is not a theoretical number here.
Ponding the recover would lock in
A membrane follows the shape underneath it. If water stands on the existing roof, it will stand on the new one. Tapered insulation can correct the slope as part of the retrofit, but that has to be designed and priced up front, not discovered after the first storm.
What the assessment includes: a walk of the full roof surface, photographs of every penetration and termination, a moisture survey, and at least one core cut to confirm layer count and deck type. You get the findings whether or not you hire us, and if the roof fails the recover test we will say so.
The "25% Rule", and Why a Repair Turns Into a Retrofit
Owners hear about the 25 percent rule after a hail season and it usually arrives as bad news. The number itself is a rule of thumb rather than a line in the code Amarillo enforces, but the principle holds: once a repair covers a large enough share of the roof, the permit can require the whole roof to be brought up to current code rather than restored to whatever standard it was built to. Current code typically means more insulation and a wind-uplift rating the original assembly never had.
This is why a large hail repair on an Amarillo commercial building so often turns into a full recover. Patch a big enough share of a roof and you have triggered the upgrade anyway, at which point a TPO retrofit across the whole surface is usually better value, because you get one warranty, one system, and no seam between old and new work waiting to fail. Which thresholds apply to your building is a question for the City of Amarillo, not for a salesperson. We confirm it when we pull the permit and tell you before you sign, not after.
What a Retrofit Costs Compared With a Tear-Off
We do not publish a per-square-foot figure for TPO, because the same membrane on two Amarillo buildings can land at very different numbers once insulation, penetrations and wet-area removal are counted. What holds across every job is the direction: a retrofit costs less than a tear-off and replacement of the same roof, for a simple reason. You are not paying a crew to remove the old roof, and you are not paying to haul it to a landfill. On a large low-slope roof, tear-off and disposal is a meaningful share of the total bill.
What pushes the price up
- 80 mil membrane instead of 60 mil
- Added insulation to satisfy current code
- Tapered insulation to correct ponding
- Curbs, drains and penetrations to re-flash
- Wet insulation that has to be cut out first
- After-hours or weekend scheduling
What the retrofit saves you
- No tear-off labor
- No dumpsters and no landfill fees
- No day with the building open to weather
- No interior protection or relocation costs
- Shorter schedule, so less operational drag
- Existing assembly adds to the R-value
Every number moves with the building. We price from the actual roof after the assessment, and the estimate shows line items, not a lump figure.
60 Mil or 80 Mil TPO in the Texas Panhandle?
Mil is thousandths of an inch of membrane thickness. What matters is not the total number but how much material sits above the reinforcing scrim. That layer is what absorbs hail bruising, dropped tools and boot traffic before the reinforcement is exposed. An 80 mil sheet carries meaningfully more of it than a 60 mil sheet.
Potter County has recorded 131 severe hail days since 2000, and the largest stone on record here is 4.25 inches. That is the environment your new membrane has to survive, and it is why we do not treat 60 mil as an automatic default the way a national spec sheet might.
We specify 80 mil on buildings with rooftop mechanical equipment, regular service traffic, or an owner who plans to hold the property long-term. On a low-traffic roof with a shorter ownership horizon, 60 mil is a defensible choice and we will tell you so rather than upsell you.
How We Sequence a Retrofit Without Closing Your Building
The single biggest advantage of a recover is that the deck never comes off, so there is no point in the project where your building is exposed. That changes how the work can be scheduled.
1. Assess and core
Full roof walk, moisture survey, core cut and fastener pull test. This is where we confirm the retrofit is legal and buildable, and where any wet insulation gets mapped for removal.
2. Permit and stage
We pull the City of Amarillo permit, confirm how the code upgrade threshold applies, and stage material and equipment away from your entrances, docks and customer parking.
3. Recover in sections
Insulation or coverboard, mechanical attachment, then heat-welded TPO, section by section, each one dried in before the crew leaves. Loud work near occupied space gets scheduled around your hours.
The noisy part of a recover is the fastening, and on a metal deck it carries straight into the space below. If that is a problem for a tenant, tell us which hours are off limits and we will build the sequence around them. After-hours work is priced as its own line so you can see what the quiet is costing.
If the Retrofit Follows a Hail Claim, Watch the Clock
A hail claim and a recover decision depend on the same two facts, and both come out of the core cut: how many layers the building already carries, and how much of the insulation is wet. An adjuster who scopes the roof from the surface will miss both, and a recover written into a scope that later fails the layer test has to be re-argued. You have a two-year window from the date of loss to file in Texas. We document the roof, core included, and meet the adjuster on site so the approved scope reflects what is actually up there.
Talk to us: (806) 622-6041Where a TPO Retrofit Sits in Our Commercial Flat-Roof Work
A retrofit is one option among several for a low-slope commercial roof. It is the right one when the existing assembly is dry, single-layered and structurally sound; it is the wrong one when it is not. Our commercial flat-roof systems page covers the full set (membrane, modified bitumen, coatings and full replacement). Start there if you have not decided a recover is the route.
We recover roofs out of 2909 S Western St in Amarillo and in Canyon, Borger, Pampa, Dumas, Hereford, Bushland and the wider West Texas market.
Frequently Asked Questions
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Find Out If Your Roof Qualifies for a Retrofit
Free retrofit assessment with a moisture survey and core cut. If the roof fails the recover test, you will know before anyone orders material.