Performance

Understand the wall. See the evidence.

Mold, strength, insulation, fire and installation—all in one place. Use the section menu to go straight to the topic you need.

Mold + indoor air

3 residencesMold-spore sampling in two; separate TVOC/TMVOC sampling in one.

The two mold-sampled homes showed indoor counts below their same-day outdoor comparisons. The third residence had low chemistry measurements relative to the report’s cited reference data.

One-time field observations—not a mold-proof claim, certification, causal finding, or guarantee.

Our window and door bucks use REZWOOD protected lumber. Keeping the whole home dry still requires proper flashing, drainage, ventilation and humidity control.

What “healthier” does—and does not—mean

Healthier living is a design goal, not a demonstrated health outcome from these samples. The reports compare indoor and outdoor measurements or cited reference data; they do not establish that ThermaTech homes are healthier than other homes. HVAC, finishes, occupant activity and maintenance all affect the result.

Representative completed ThermaTech project among mature trees; not a sampled residence
Representative ThermaTech project—not one of the sampled residences.

Total VOCs in one home

Measured

House 1 was sampled in January 2026. Testing from a house that was being lived in. Total VOCs were reported below 200 µg/m³, the lab's detection limit. The home bar shows that limit, not a reading of zero.

  1. House 1<200 µg/m³
    Below the lab's detection limit · not a zero reading
  2. Laboratory database average≈1,900 µg/m³
    Reference average · about 45,000 residential samples

Measured assumptions. Independent inspector summary, February 2026. The reference average comes from about 45,000 residential samples, not a national ranking of houses. This test does not isolate the panels.

Mold-related volatile compounds

Measured

TMVOC is this report’s selected mold-related total. It does not count spores and does not establish that no mold exists.

  1. House 1<3 µg/m³
    Upper reporting bound · not a spore count
  2. Laboratory database average≈10 µg/m³
    Reference average · same summary

Measured assumptions. Same House 1 sample and inspector summary. The home bar is an upper reporting bound on its own scale, separate from the TVOC chart.

House 2 spore samples

Measured

December 2025 indoor samples ranged from 13 to 40 spores per cubic meter, compared with about 120 outdoors. The inspector reported no evidence of indoor amplification in this home.

  1. Living area13
    spores/m³ · December 2025
  2. Primary bedroom26
    spores/m³ · December 2025
  3. Hallway26
    spores/m³ · December 2025
  4. Back bedroom40
    spores/m³ · December 2025
  5. Den27
    spores/m³ · December 2025
  6. Outdoor sample≈120
    Same-day outdoor comparison

Measured assumptions. One occupied home. Results depend on the day, the mold types, and outdoor air. This is not a regional average or a controlled wall test.

House 3 spore samples

Measured

September 2025 indoor readings ranged from 27 to 173 spores per cubic meter. The outdoor sample was above 10,000, so its bar shows that lower bound and the indoor bars stay small on the same scale.

  1. Laundry room173
    spores/m³ · September 2025
  2. Living area93
    spores/m³ · September 2025
  3. Kitchen80
    spores/m³ · September 2025
  4. Bedroom53
    spores/m³ · September 2025
  5. Hallway40
    spores/m³ · September 2025
  6. Office27
    spores/m³ · September 2025
  7. Outdoor sample>10,000
    Lower bound · the result is above 10,000

Measured assumptions. LaBastide home. The outdoor display is “>10,000”; the bar length uses 10,000 only as that lower bound, not as an exact count. These observations do not establish a regional ranking or a controlled mold-resistance result.

Structural performance

ASTM E72Testing cited by the related Arrow alternative-material opinion.

Photographs document a ThermaTech specimen in a loading rig. Exact allowable values, geometry, load paths, connections, and local acceptance still require the source report and project-specific sealed design.

Test imagery documents the setup; it does not publish an allowable load or establish project approval.

ThermaTech panel specimen positioned in a structural loading frame

R-value + energy

R-20.48–R-21.07Modeled effective clear-wall range for the two assessed 5.5-inch configurations.

R-42–R-50 is the modeled typical-framing performance equivalent in Intertek’s total-heat-loss comparison. It is not a nominal or laboratory-tested wall R-value.

The comparison includes assumed, untested air-leakage and infiltration inputs. Whole buildings vary.

Close view of ThermaTech framing and continuous EPS panel components

R-value by assembly

Modeled

Clear-wall results for the two assessed ThermaTech sections, next to the fiberglass baseline in the same report.

  1. ThermaTech · 2×4 center studsR-21.07
    Modeled clear wall · U-0.047 · 5½-inch assembly
  2. ThermaTech · 2×6 center studsR-20.48
    Modeled clear wall · U-0.049 · 5½-inch assembly
  3. 2×6 wood · R-19 battsR-15
    Modeled effective assembly · same report

Modeled assumptions. Intertek, June 2026, LBNL THERM and ASHRAE 90.1 Appendix A. The ThermaTech figures are 5½-inch clear-wall sections and exclude top and bottom framing. The batt figure is that report’s effective assembly value for an ASHRAE 90.1 2×6 wood wall with R-19 cavity insulation, not a claim about every framed wall. The model assumed 1.0 pcf EPS at R-4.35 per inch. ASTM C578 Type I is R-3.6 per inch and Type VIII is R-3.8 per inch, so the EPS on a project has to match the model before the result is used. This is not a hot-box test.

Thermal bridge at the stud

Modeled

Studs sit in opposite faces of the foam, so there is no solid wood path straight through the wall. This chart is the modeled resistance of that stud path. It is not a split of heat flow among studs, cavity, and the thermal break.

  1. ThermaTech stud pathAbout R-12.6
    Modeled path through the separated studs
  2. Solid 2×6 studAbout R-6 to R-7
    Reported range for a solid stud, shown as a range

Modeled assumptions. Intertek THERM stud path, about R-12.6, compared with about R-6 to R-7 for a solid 2×6 stud. The solid-stud bar is that reported range, not a single tested point. Clear-wall sections still exclude plates and junctions.

Conductive heat loss versus the batt baseline

Modeled

In the same Intertek model, the 2×4 center-stud panel lost about 30% less heat by conduction than the 2×6 R-19 batt baseline. The 2×6 center-stud panel was about 27% lower. The bars show heat loss still remaining, with the baseline at 100.

  1. 2×6 wood · R-19 battsBaseline
    Modeled effective assembly R-15
  2. ThermaTech · 2×4 center studsAbout 30% less
    Modeled conductive heat loss still remaining
  3. ThermaTech · 2×6 center studsAbout 27% less
    Modeled conductive heat loss still remaining

Modeled assumptions. Intertek Table 3, conduction only, against one specified 2×6 R-19 wood baseline at effective R-15. Air leakage of the panel was not tested. A separate total-heat-loss figure in the report adds an assumed infiltration reduction and is not used here. Savings vary with climate, fuel, design, and how the home is used.

Other walls, clear wall and whole wall

Modeled

These are other published assemblies. They are not the ThermaTech panel, and the bars are not a cross-study product ranking.

DOE/BSC open-cell spray foam

  1. Cavity insulation labelR-21
    Modeled input · separate study
  2. Clear wallR-17.2
    Modeled · 5½ in. · 2×6 at 24 in. o.c. · OSB
  3. Whole wallR-16.5
    Modeled · same table

DOE/BSC closed-cell spray foam

  1. Cavity insulation labelR-29
    Modeled Table 11 entry · 5 in. foam
  2. Clear wallR-20.3
    Modeled · 2×6 at 24 in. o.c. · OSB
  3. Whole wallR-19.1
    Modeled · same table

Oak Ridge National Laboratory

  1. 2×6 R-19 batt · clear wallR-16.4
    Published research · not a ThermaTech test
  2. 2×6 R-19 batt · whole wallR-13.7
    Published research · not a ThermaTech test
  3. Foam-core panel example · whole wallR-21.6
    Published example · not a ThermaTech test

Modeled assumptions. DOE-hosted Building Science Corporation High-R Walls, Table 11: open-cell is 5½-inch foam in 2×6 advanced framing at 24 inches on center with OSB; closed-cell is 5-inch foam in that same framing. Oak Ridge National Laboratory reported the batt and foam-core examples for those assemblies. Whole-wall values include plates, junctions, and other details that a clear-wall section leaves out.

One home’s blower-door result

Measured

A five-year-old ThermaTech home in Fort Worth tested at 2.65 ACH50 in 2025. The other bars are published reference points, not measurements of this house or of a panel.

  1. Fort Worth home · 20252.65 ACH50
    Measured · one home · about five years occupied
  2. 2021 IECC limit · zones 3–83.0 ACH50
    Code limit · not a test of this home
  3. RESNET · zone 4A averageAbout 3.5
    Published average · not a ThermaTech result
  4. RESNET · zone 3A averageAbout 3.6
    Published average · not a ThermaTech result

Measured assumptions. Henry energy case study, one occupied home. Airtightness depends on the whole house. The 2021 IECC limit shown is 3.0 ACH50 for climate zones 3–8. RESNET climate-zone 3A and 4A averages are about 3.6 and about 3.5. Air leakage of the panel itself was not tested under ASTM E2178 or E2357. This chart is not a leakage reduction for the panel.

Observed energy bills for one home

Measured

Average monthly electricity was $86.79 and gas was $24.37 during the 2020–2021 study of the Henry home. These are observed costs, not a predicted saving.

  1. Electricity$86.79
    Measured monthly average · 2020–2021 · one home
  2. Gas$24.37
    Measured monthly average · 2020–2021 · one home

Measured assumptions. One household in Fort Worth: 3,196 conditioned square feet, two occupants, 71°F setting. The home also had open-cell roof insulation and its own windows and HVAC. Current bills depend on climate, rates, design, and use.

Effective wall R-value (higher is better)

  1. Steel frame 2×6, fiberglass battsR-91 Source 1
  2. Wood frame 2×6, fiberglass battsR-151 Source 1
  3. ThermaTech panelR-211 Source 1

Effective R-value for code compliance, from Intertek Table 3. Higher is better.

See the full Table 3 numbers
SystemWhat the number isR-valueSource
ASHRAE 90.1 2×6 wood frameNominal insulation labelR-19Source 1
ASHRAE 90.1 2×6 wood frameEffective for codeR-15Source 1
ASHRAE 90.1 2×6 wood frameTotal effective, with infiltrationR-15Source 1
ASHRAE 90.1 2×6 steel frameNominal insulation labelR-19Source 1
ASHRAE 90.1 2×6 steel frameEffective for codeR-9Source 1
ASHRAE 90.1 2×6 steel frameTotal effective, with infiltrationR-9Source 1
ThermaTech · 5.5 in. · 2×4 center studsNominal insulation labelR-24Source 1
ThermaTech · 5.5 in. · 2×4 center studsEffective for codeR-21Source 1
ThermaTech · 5.5 in. · 2×4 center studsTotal effective, with reduced infiltrationR-23.3Source 1
ThermaTech · 5.5 in. · 2×6 center studsNominal insulation labelR-24Source 1
ThermaTech · 5.5 in. · 2×6 center studsEffective for codeR-20Source 1
ThermaTech · 5.5 in. · 2×6 center studsTotal effective, with reduced infiltrationR-22.3Source 1
ThermaTech · 2×4 center studs · compared with wood framePerformance equivalentR-43Source 2
ThermaTech · 2×4 center studs · compared with steel framePerformance equivalentR-50Source 2
ThermaTech · 2×6 center studs · compared with wood framePerformance equivalentR-42Source 1
ThermaTech · 2×6 center studs · compared with steel framePerformance equivalentR-49Source 1
ThermaTech · 5.5 in. · 2×4 center studsModeled clear wallR-21.07Source 3
ThermaTech · 5.5 in. · 2×6 center studsModeled clear wallR-20.48Source 3
Other published comparisons
SystemWhat the number isR-valueSource
2×4 wood · 16 in. o.c. · R-11 battsNominal insulation labelR-11Source 4
2×4 wood · 16 in. o.c. · R-11 battsClear wallR-10.6Source 4
2×4 wood · 16 in. o.c. · R-11 battsCenter of cavityR-13.6Source 5
2×4 wood · 24 in. o.c. · R-11 battsNominal insulation labelR-11Source 4
2×4 wood · 24 in. o.c. · R-11 battsClear wallR-10.8Source 4
2×4 wood · 24 in. o.c. · R-11 battsWhole wallR-9.9Source 4
2×4 wood · 24 in. o.c. · R-11 battsCenter of cavityR-13.6Source 5
2×6 wood · 24 in. o.c. · R-19 battsNominal insulation labelR-19Source 4
2×6 wood · 24 in. o.c. · R-19 battsClear wallR-16.4Source 4
2×6 wood · 24 in. o.c. · R-19 battsWhole wallR-13.7Source 4
2×6 wood · R-19 batts · ASHRAE 90.1 baselineEffective assemblyR-15Source 1
SIP · 3.5 in. EPS coreClear wallR-15.17Source 6
SIP · 3.5 in. EPS core · best-practice detailsWhole wall · best-practice detailsR-14.09Source 6
6 in. foam-core stress-skin panelClear wallR-24.7Source 4
6 in. foam-core stress-skin panelWhole wallR-21.6Source 4
EPS block-form ICFClear wallR-15.2Source 4
Tested ICF · 9¼ in. formHot-box measurementR-11.6Source 7
Tested ICF · 9¼ in. formSimulated clear wallR-12.0Source 7
Tested ICF · 9¼ in. formWhole wallR-11.1Source 7
Open-cell spray foam · 2×6 at 24 in. o.c.Nominal cavity labelR-21Source 8
Open-cell spray foam · 2×6 at 24 in. o.c.Clear wallR-17.2Source 8
Open-cell spray foam · 2×6 at 24 in. o.c.Whole wallR-16.5Source 8
Closed-cell spray foam · 2×6 at 24 in. o.c.Nominal cavity labelR-29Source 8
Closed-cell spray foam · 2×6 at 24 in. o.c.Clear wallR-20.3Source 8
Closed-cell spray foam · 2×6 at 24 in. o.c.Whole wallR-19.1Source 8
  1. Intertek report T6399.01-304-17R0, June 2, 2026, Table 3, page 8. Effective R-value and U-factor compared with ASHRAE 90.1 2×6 wood-frame and steel-frame walls.
  2. Intertek report T6399.01-304-17R0, June 2, 2026, Section 6 summary (page 5) and Table 3 (page 8). R-value performance equivalent versus a wood-framed wall for the 5.5-inch panel with 2×4 center studs. Includes assumed, untested air leakage (Table 3 notes * and **).
  3. Intertek report T6399.01-304-17R0, June 2, 2026, Table 1, page 7. Area-weighted clear-wall result for the assessed 5.5-inch section.
  4. Christian and Kosny, Oak Ridge National Laboratory, “Thermal Performance and Wall Ratings,” Table 1.
  5. Christian and Kosny, Oak Ridge National Laboratory, “Thermal Performance and Wall Ratings,” Table 2 (in-cavity R-value).
  6. Kosny, Desjarlais, and Christian, Oak Ridge National Laboratory, “Whole Wall Rating/Label for Structural Insulated Panels: Steady-State Thermal Analysis,” June 4, 1999.
  7. Christian, Kosny, Desjarlais, and Childs, Oak Ridge National Laboratory, “The Whole Wall Thermal Performance Calculator,” insulated-concrete-form section.
  8. DOE-hosted Building Science Corporation, High-R Walls Case Study Analysis (revised June 2011), Table 11.
Left off this chart.
  • ThermaTech panel wall with added cavity insulation. No modeled or published clear-wall or whole-wall R-value for a ThermaTech panel plus added cavity insulation is in this site’s sources. That assembly is not estimated here.
  • ThermaTech whole-wall R-value. Intertek does not publish a steady-state whole-wall R-value. Table 3’s R-43 and R-50 figures are performance equivalents that include assumed air leakage. They are charted separately and are not a whole-wall R-value. Top and bottom framing, corners, and openings are outside the clear-wall sections.
  • ICF climate-equivalent performance. The ORNL whole-wall calculator paper also reports climate-specific wood-frame equivalents for the tested ICF (R-14.5 in Minneapolis, R-17.2 in Washington, D.C., and up to R-20.5 in Phoenix), plus a wider band after an airtightness assumption. Those are not the wall’s steady-state R-value, so they are not drawn as wall R-values. Source
  • Unfinished SIP hot-box surface resistances. The ORNL SIP report also lists hot-box results for unfinished 3.5-inch and 5.5-inch panels without the siding and gypsum used in the whole-wall model. Those surface resistances are not whole-wall ratings, so they are not charted. Source

Not charted, because these sources do not support the numbers: a heat-flow percentage split among studs, the cavity, and the thermal break; a tested panel air-leakage reduction; a laboratory hot-box R-value; R-42–R-50 or R-47 drawn as a wall R-value; a ranking of this panel against spray foam; and a predicted utility-bill savings figure.

30%LESS HEAT LOSSTHROUGH THE WALL THAN A 2x6 R-19 WALLINTERTEK MODEL · CONDUCTION THROUGH THE WALL

2x6 WALL, R-19 BATTSTHERMATECH 5.5" PANEL
U-0.067 (effective R-15) = 100%
U-0.047 (effective R-21) = 70%

30% less heat loss

0.000.020.040.060.08

U-FACTOR (Btu/h·ft²·°F): LOWER = LESS HEAT LOSS

Source

Source: Intertek report T6399.01-304-17R0 (issued 06/02/26), Tables 1 and 3. LBNL THERM model + ASHRAE 90.1-2022 Appendix A area-weighting, 75°F mean. Modeled, not a hot-box test.

"Conductive Heat Loss Reduction" vs. the ASHRAE 90.1 2x6 wood-frame R-19 wall: 30% (panel with 2x4 center studs, U-0.047) and 27% (2x6 center studs, U-0.049). Air leakage not included.

Intertek's EPS input assumes R-4.35/in at 1.0 pcf. Use of the Intertek name in advertising requires Intertek's written approval. Your savings will vary.

Heat doesn't find a shortcut through the studs

Intertek THERM heat map of the ThermaTech panel wall in top view, with 2x4 center studs. Temperature bands stay nearly straight across the studs.
  1. Warm room side, about 96°F.
  2. Cold outside, about 51°F.
  3. Stud location. The studs are wrapped in foam, so the color bands barely bend here. No cold stripe through the framing.
  4. Continuous EPS foam core. Temperature drops evenly across the wall instead of short-circuiting through wood.
  5. Modeled opaque-wall R-25.9.

Source: Model 1 (2x4 center studs) from Intertek report T6399.01-304-17R0, Figure 1. Modeled, not tested.

Fire characteristics

Fire performance depends on the insulation, its protection and the complete wall assembly. The Carpenter EPS evaluation covers the named insulation component and its installation conditions; it is not an hourly ThermaTech wall-assembly rating or the separate UL Listing/Classification document.

Watch the fire demonstrations

Two 59-second overviews of company demonstrations. Playback is accelerated and labeled. In-house footage is not an accredited fire-resistance test and does not establish an hourly wall-assembly rating.

⅝-inch drywall fire demonstration

0:59 edited video · Silent footage

Company footage of the specimen identified as the ⅝-inch drywall demonstration, shown in full sequence at approximately 1.09× playback speed. The 59-second viewing time is not the exposure duration. Temperature and other statements in the footage are company-reported, not independently verified results or a wall-assembly rating.

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½-inch drywall fire demonstration

0:59 edited video · Sped-up original audio · Captions not yet available

Company footage of the specimen identified as the ½-inch drywall demonstration, shown in full sequence at approximately 1.50× playback speed with tempo-adjusted original audio. The 59-second viewing time is not the exposure duration. Statements in the footage are company-reported, not independently verified results or a wall-assembly rating.

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Wind + the complete load path

Panels, connections, openings and anchors must work together. The design depends on the site, exposure, building height and geometry. There is no single wind-speed rating that applies to every ThermaTech project.

A coordinated installation

Numbered panels and prepared openings help the crew stage, set and connect the wall package. Timing still depends on the project, crew, weather, site access, foundation tolerances and approved details.

See the walls go up — 59-second time-lapse

0:59 edited video · Silent footage

Watch the crew carry, position, connect and brace exterior wall panels. This 59-second overview preserves the supplied sequence at approximately 206× original speed, with its elapsed-time overlay and a separate speed label. Playback length is not installation time; the pace of this project is not a guaranteed schedule for another build.

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