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Why 0.25 mm of Super Therm Outperforms Bulk Insulation

Cool Surfaces | Heat Policies | Insulation Coatings | Sustainability | Thermal Info

The industry is trained to think thicker equals better.

More R-value. More bulk. More layers.

But thickness only addresses one part of heat transfer. It deals primarily with conductive flow once heat has already entered the material.

Super Therm® works at the surface.

And that changes everything.

Bulk Insulation: Delays Heat. It Does Not Stop It.

Fibreglass, mineral wool, foam. All designed to resist conductive heat flow.

They slow heat movement by trapping air.

What they do not do is stop radiant heat load from striking the building envelope in the first place.

Once solar radiation hits metal or concrete, that substrate heats up. Bulk insulation then tries to slow the transfer inward.

That is reactive performance.

0.25 mm Dry Film Thickness. Surface Control.

Super Therm® is applied at 0.25 mm dry film thickness (250 microns).

That thin layer performs across the three pillars of surface heat management:

  • High solar reflectivity
  • High infrared emissivity
  • Low thermal diffusivity

Solar radiation is approximately 44% visible, 53% near infrared and 3% UV. Most heat energy sits in the infrared band.

Super Therm® reflects and blocks the majority of that load before the substrate temperature spikes.

Less surface temperature rise means less conductive drive.

That is proactive performance.

Independent ASTM testing confirms its infrared blocking capability and thermal resistance behaviour in thin film form.

You can review full testing data here:
https://neotechcoatings.com/super-therm-testing-and-results/

The Conductivity Argument Misses the Point

Critics default to K-values.

Thermal conductivity measures steady-state heat flow through a material.

But buildings under solar load are not steady state systems. They are dynamic.

Surface temperature spikes create rapid heat ingress.

Thermal diffusivity, not just conductivity, determines how fast that heat penetrates.

A low diffusivity surface like Super Therm® slows that temperature wave.

That is why thin ceramic systems can materially alter internal temperature behaviour even without thickness.

More complicated: bulk insulation deals with conductive transfer. Super Therm® manages radiant load and temperature rise at the boundary layer.

Two different mechanisms.

Real-World Field Performance

The City of Adelaide Cool Roof Trial recorded internal temperatures up to 6°C below ambient on a 41°C day when Super Therm® was applied.

That is not theoretical modelling. That is field measurement.

Bulk insulation alone does not produce that result on a sun-loaded metal roof without mechanical cooling support.

Why Thickness Is Not the Metric That Matters

Bulk insulation:

  • Works inside cavities
  • Requires structural depth
  • Can absorb and retain heat
  • Adds weight
  • Requires demolition to retrofit

Super Therm®:

  • 0.25 mm dry film
  • Applied directly to external surfaces
  • Blocks radiation heat load
  • Reduces substrate temperature
  • Retrofit friendly
  • No structural changes

It is not competing on thickness.

It is competing on heat blocking behaviour.

In Simple Terms

Bulk insulation is a brake pedal after the car is moving.

Super Therm® reduces the speed before the car starts rolling.

The Strategic Advantage

In a 2050 climate with higher solar intensity and longer heat events, controlling surface heat load is no longer optional.

Energy modelling tools often ignore surface thermal behaviour and focus on cavity R-values. That leaves a performance gap.

Closing that gap is where thin-film ceramic systems create disproportionate impact.

0.25 mm sounds insignificant. In surface physics, it is decisive.

If you judge performance by thickness, bulk insulation wins.

If you judge performance by surface heat control and real-world behaviour, 0.25 mm changes the equation.


References

  1. SUPER THERM® Independent Testing and Results
    https://neotechcoatings.com/super-therm-testing-and-results/
  2. ASTM E1461 – Standard Test Method for Thermal Diffusivity by the Flash Method
    https://www.astm.org/e1461
  3. U.S. Department of Energy – Cool Roof Basics
    https://www.energy.gov/energysaver/cool-roofs

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