5 Star Residential and Commercial Roofing
Metal Roof Retrofit Over an Existing Roof in Amarillo, TX
Quick Summary
- •A retrofit is a new roof system built on framing above the old one. The existing roof stays put and becomes a substrate. It is not a repair and it is not a patch.
- •Because the new roof sits on framing, it can add what the original never had: real slope, real insulation, and an uplift path engineered for Panhandle wind.
- •The gate is structural. Added dead load and a new uplift path have to be verified against the existing purlins and frames before anything is ordered.
- •Next step: free retrofit feasibility assessment including fastener pull tests. Call (806) 622-6041 or use the contact form on this page.
A New Roof Above the Old One, Not a New Skin On It
A metal retrofit is easy to describe and easy to misunderstand. We fasten a sub-framing system (hat channels, sub-purlins or a light bar system depending on the building) through the existing roof into the structure below it. New insulation goes into the space that framing creates. A new metal roof, usually a standing seam with concealed clips, is installed on the framing. The old roof never comes off. It ends its life as a substrate and a secondary water barrier.
That is a fundamentally different product from repairing the roof you have. Our metal roof repair page covers fixing individual failures, and it is the cheaper answer while the failures are still individual. A retrofit is what you buy when they are not: when the fastener holes are worn across the whole roof, when corrosion is general rather than spotted, or when the building has problems the original roof was never built to solve.
What a Retrofit Can Fix That a New Panel Cannot
Replacing panels one-for-one gives you the same roof you had, newer. A retrofit gives you a chance to correct the original design, and on Panhandle buildings that is usually where the value sits.
It can add slope
The framing can be built to create pitch where the existing roof had almost none. A building that has been ponding water for a decade can finally be made to drain, something no coating or membrane recover can achieve on its own, because those follow the shape underneath them.
It can add insulation
The cavity between old roof and new panels is where insulation goes. On an older metal building with almost none, this is the practical route to a real thermal envelope, and to ending the winter condensation that gets misdiagnosed as a leak every year.
It removes exposed fasteners
Retrofitting a through-fastened roof with a concealed-clip standing seam ends the cycle of re-screwing every several years, because the new system has no gasketed penetrations through the field of the panel to fail in the first place.
It re-engineers the uplift path
The attachment is designed for today's wind requirements rather than whatever the building was built to. At 3,600 feet with an average wind of 14.3 mph and spring gusts well above that, this is not a paperwork exercise.
If your building is a warehouse with a persistent cold-morning drip that no repair has ever fixed, read the condensation section on our warehouse roofing page before you buy another repair.
The Structure Has to Say Yes First
A retrofit puts a second roof's worth of dead load on a frame that was designed for one, and it changes how uplift is transferred into the building. Nobody should quote this work from a parking lot. Four findings decide it.
Purlins or frames that cannot take the load
The added weight and the new uplift path have to be carried by the existing structure. On buildings where that is in doubt, this is a question for a structural engineer and the answer goes in writing before material is ordered.
Corroded purlins or a failing deck
Retrofit framing has to be anchored into sound material. Where years of leaking have rusted the purlins the new roof would be fastened to, the honest scope is repair of the structure first, or replacement.
Wet insulation left in place
Anything saturated under the old roof does not dry out because a new roof went over it. Wet material gets mapped and removed as part of the scope; if the map comes back mostly wet, the project is a replacement.
A building at its roof-covering limit
Code limits how many roof coverings a structure may carry. A building that has already been recovered once may not be permitted a second, and that is confirmed with the City of Amarillo when the permit is pulled, not afterwards.
What the feasibility assessment includes: a full roof walk with photographs, fastener pull tests to confirm what the existing structure will hold, a moisture survey of the assembly below, and a written statement of whether the retrofit is buildable on your building. You get the findings whether or not you hire us.
How the Work Runs Without Closing the Building
The operational argument for a retrofit is simple: the existing roof stays watertight the entire time, so there is never a day when your building is open to weather. That changes what is possible on an occupied warehouse, plant or retail box.
1. Verify and design
Roof walk, pull tests, moisture survey and structural review. The framing layout, slope design, insulation and attachment are engineered from the actual building before anything is ordered.
2. Frame in sections
Sub-framing is set section by section and fastened into the structure below, keeping the old roof intact and draining while the new geometry goes up above it.
3. Insulate and panel
Insulation into the cavity, then panels and trim, with every section closed out before the crew leaves. Loud work near occupied areas is scheduled around your operating hours.
If your building is low-slope rather than metal, the equivalent conversation is a single-ply recover, covered under commercial TPO roof retrofit, and both routes sit inside the broader roof restoration decision.
Retrofit, Repair or Replace
Three roads leave the same starting point, and the assessment is what decides which one your building is on. We will tell you which, including when the answer costs us the bigger job.
Retrofit is the right call when
- The structure is sound but the roof is done
- The building cannot be opened to weather
- You need slope or insulation the original lacked
- You are tired of the re-screw cycle
- You intend to hold the building long-term
Something else is the right call when
- Failures are still individual, so repair them
- Purlins or deck are corroded through
- The structure cannot carry the added load
- The building is at its covering limit
- A covered storm loss funds a full replacement
For a new metal roof on a building that is being re-roofed conventionally rather than retrofitted, see standing seam metal roof installation and metal building and R-panel roofing.
Do Not Cover a Storm-Damaged Roof Before It Is Documented
A retrofit permanently encloses the old roof. If hail or wind damaged it and the claim is not settled, the evidence goes under the new system and does not come back, and neither does the option of having the carrier fund the replacement instead of you funding the retrofit. Potter County has recorded 131 severe hail days since 2000, so on any metal building more than a few years old the question is worth asking. You have a two-year window from the date of loss to file in Texas. Document the existing roof first, then retrofit over it.
Talk to us: (806) 622-6041Where Retrofits Sit in Our Commercial Metal Work
A retrofit is one of several answers for an aging metal roof. Our commercial metal roofing page covers the whole range (panel systems, repair, re-fastening, retrofits and new installation). Start there if you have not yet decided which category your building is in.
We build retrofit systems out of 2909 S Western St in Amarillo and in Canyon, Borger, Pampa, Dumas, Hereford, Plainview, Bushland and the wider West Texas market.
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Find Out If Your Building Can Take a Retrofit
Free feasibility assessment with fastener pull tests, a moisture survey and a written buildable-or-not answer, including when the answer is no.