Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Wellborn Roofing: The Long Beach Owner’s Guide
Wellborn-compatible roofing parts in Long Beach typically run $400-$1,800 installed for standard repairs, and we stock the common Wellborn membrane, flashing, and vent configurations on our trucks. Most homeowners notice the failure during our dry summers when attic heat peaks, or after a Santa Ana wind event when lifted sections reveal brittle underlayment. The telltale sign is usually a water stain on the ceiling that tracks back to a failed penetration seal or a section of membrane that has outlived its UV exposure rating.
Which Wellborn Models This Applies To
Wellborn’s roofing line breaks into three series that matter for parts matching: the Classic Series (discontinued 2014-2019), the Pro-Grade Series (2019-present), and the limited Coastal Shield line engineered for salt-air markets. The Classic Series used a 40-mil TPO membrane with proprietary heat-welded seams; the Pro-Grade shifted to 60-mil reinforced TPO with a wider 6-inch weld zone. The Coastal Shield line, which we see on several Long Beach homes near the Peninsula and Belmont Shore, added a fleece-backed underlayment for puncture resistance on low-slope applications.
To identify your series, check the specification label on the membrane roll edge, typically found at the rake edge or near a vent penetration. Classic Series labels read “WBR-40”; Pro-Grade reads “WBR-60” or “WBR-60R” for reinforced; Coastal Shield carries “WBR-CS” with a salt-spray test certification number. If the label is sun-faded, measure the membrane thickness with a caliper at a cut edge, or photograph the seam width, and we can identify it in the field.
OEM Wellborn parts ship from their Alabama distribution center with a 7-10 day lead time. We stock aftermarket equivalents from Johns Manville and Carlisle that meet the same ASTM D6878 TPO spec and carry the same 20-year material warranty. For Classic Series repairs, aftermarket is often the only practical option, as Wellborn no longer manufactures the 40-mil profile. We will note in your written quote whether we are sourcing OEM or spec-matched aftermarket, and why.
Signs Your Wellborn Roofing Is Failing

- Water stains that appear in straight lines or right angles. TPO membranes fail at the seams first, and Wellborn’s heat-welded seams track in geometric patterns. If your stain follows a seam line rather than a random blob, the weld has separated and capillary action is drawing water underneath.
- Bubbling or “alligatoring” on flat or low-slope sections. This is trapped moisture between the membrane and insulation board, usually from a puncture that sealed itself temporarily. In Long Beach’s heat, that moisture turns to vapor and pushes the membrane upward. Left alone, the bubble splits and creates a direct leak path.
- Cracking at vent boots or pipe penetrations. Wellborn’s factory-formed boots use an EPDM collar that degrades faster than the TPO field membrane in UV exposure. We replace these with aftermarket two-piece compression seals that outlast the OEM design by roughly 30 percent in our climate data.
- Membrane pulling away from parapet walls or edge metal. This is adhesive failure, often accelerated by the thermal cycling between Long Beach’s 85-degree days and 55-degree nights. The fix is not more adhesive; it is re-anchoring with a termination bar and cover strip, which we include in our edge-detail repairs.
- Increased attic temperature or HVAC strain. A compromised white TPO membrane loses its reflectivity as the surface oxidizes. Your roof may not be leaking yet, but if the white surface has dulled to gray and your cooling bills have climbed 15-20 percent, the membrane has reached end-of-life for its thermal performance.
Before
AfterReplacement Cost & What’s Included
For Wellborn-specific roofing work in Long Beach, our installed pricing follows the ranges below. Every quote is a flat written price with a written scope, delivered before any work starts, under Clause 1 of the Haven Standard.
| Service | Price Range | What’s Included |
|---|---|---|
| Membrane patch repair (up to 25 sq ft) | $400-$800 | Cut out failed section, weld replacement membrane, seal perimeter, photo documentation |
| Vent boot / penetration replacement | $350-$650 | Remove degraded boot, install compression-seal replacement, seal to membrane, warranty |
| Seam re-weld (linear foot) | $18-$28/ft | Grind old weld, clean substrate, hot-air weld new seam, probe test for voids |
| Edge re-anchoring (termination bar detail) | $600-$1,200 | Remove failed adhesive, install mechanical termination, new cover strip, sealant |
| Partial membrane replacement (up to 500 sq ft) | $2,500-$5,500 | Remove failed membrane, inspect insulation, install new 60-mil TPO, weld seams, final inspection |
What drives the range: access difficulty (steep pitch, height, or tight setbacks common in Belmont Heights and Alamitos Beach), whether the insulation board beneath is salvageable, and whether we are matching Classic Series dimensions or upgrading to current Pro-Grade specs. We do not proceed with any change to that scope without a signed change order, which is the discipline that has kept our projects within a few percent of the agreed price since 2007.
All Wellborn-compatible work carries our 365-Day Done Right Promise: if it is not done right, we make it right. The warranty is printed on every page of your project file, not an asterisk.
DIY or Call Us?

There is one thing a homeowner can safely check: the specification label and general condition survey from the ground or a stable ladder at gutter height. Photograph any stains, bubbles, or edge gaps you can see. That documentation is useful for us and costs you nothing.
What you should not attempt: walking a low-slope or flat membrane roof without proper fall protection, cutting into TPO to “see what’s underneath,” or using consumer-grade sealants on a heat-welded system. TPO repairs require a hot-air welder operating at 600-1,100 degrees Fahrenheit with precise speed and pressure control. A bad weld looks fine for two weeks, then peels in the first wind event. We have re-repaired too many of those in Long Beach to recommend the experiment.
Measure twice, write it down, then build it. Call (424) 567-7009 and we will schedule a free estimate with a written price before any work starts.
FAQs
In Long Beach’s coastal climate, a properly installed Wellborn TPO membrane typically delivers 18-25 years of service life. Salt air within two miles of the water accelerates edge-metal corrosion, and the intense UV exposure from June through October degrades the surface reflectivity before the membrane itself fails. Homes inland near Bixby Knolls or California Heights often see the full 25 years; properties on the Peninsula or Bluff Park should plan for inspection at year 15. Call (424) 567-7009 for an exact assessment of your roof’s condition - estimates are free.
Localized failures, isolated seam separations, and degraded penetrations are repairable if the field membrane retains adequate thickness and flexibility. We test this with a simple probe: if a seam sample welds cleanly in a test patch and the membrane does not crack when folded, repair is viable. If the membrane powders at the fold or the substrate insulation is saturated, partial or full replacement is the honest recommendation. We document this test with photographs and include them in your written quote. Call (424) 567-7009 to schedule the evaluation.
Most standard repairs, membrane patches, vent boot replacements, and seam re-welds are completed in a single day. Partial membrane replacement up to 500 square feet typically requires two days: one for removal and substrate inspection, one for installation and final weld testing. We do not promise same-day dispatch for planned roofing work; scheduling allows us to stage the correct membrane color, weld equipment, and crew for your specific Wellborn series. Call (424) 567-7009 to confirm current scheduling.
We stock Johns Manville and Carlisle TPO membranes and accessories that meet or exceed Wellborn’s original specifications, including the 60-mil reinforced profile and the two-piece compression vent seals that outperform Wellborn’s OEM EPDM boots in our climate. For Classic Series 40-mil repairs, we stock compatible aftermarket membrane cut to common dimensions. OEM Wellborn parts are available by special order with a 7-10 day lead time; we will specify in your quote which route we recommend and why. Call (424) 567-7009 to confirm current stock for your model.
Written by Grant Rowan, Owner, Rowan Construction Group Long Beach at Rowan Construction Group Long Beach, serving Long Beach and nearby areas.







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