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Fibro cement is everywhere. Affordable, easy to install, and structurally sound.
But thermally? It’s weak.
It has low thermal mass and low resistance to radiant heat. That means:
That’s why fibro homes feel hot during the day and don’t cool down at night.
You’re not just dealing with insulation gaps. You’re dealing with surface heat load.
Most people try to fix fibro walls from the inside. Batts, boards, foil.
That’s backwards.
The heat has already entered the wall system.
Fibro cement doesn’t stop radiation. It absorbs it, then conducts it inward.
So the real problem sits at the surface:
sun → fibro sheet → heat absorption → heat transfer → internal load
If you don’t stop that first step, everything else is just damage control.
Super Therm® is not a bulk insulation.
It’s a surface-applied thermal insulation barrier.
At just 0.25mm dry film thickness, it changes how the wall behaves thermally.
It works across three mechanisms:
Reflects 97% of UV and a high portion of visible light
Stops up to 99% of infrared radiation – which is where most heat energy sits
Very low thermal diffusivity means heat doesn’t move through the coating easily
This is where most coatings fall apart. They reflect some light, but still let heat pass through.
Super Therm® blocks it.
Applying Super Therm® to the outside of fibro cement walls is where the biggest gain is.
You’re stopping heat at the source.
This directly reduces:
Real-world data backs this up.
In the City of Adelaide Cool Roof Trial, internal temperatures dropped by up to 6°C below ambient.
That’s surface control doing its job.
Internal application isn’t the primary move, but as a thermal membrane Super Therm® blocks warm air touching cold surfaces, keeping the heat in the room.
Especially useful where:
Think of it as a thermal buffer with a membrane on the walls.
Not stopping the problem – but reducing its impact for cold fibro cement homes.
Heavy materials like concrete store heat.
Fibro doesn’t store much – it transfers it quickly.
That makes it ideal for a surface solution like Super Therm®.
You’re not fighting stored heat. You’re intercepting fast-moving heat.
That’s why results feel immediate:
Fibro walls highlight a bigger industry problem.
R-values measure resistance to conductive heat under steady conditions.
They don’t deal with:
That’s where most buildings lose the battle.
Super Therm® isn’t replacing insulation. It’s fixing what insulation doesn’t address.
Fibro cement walls don’t need more bulk.
They need better surface control.
Apply Super Therm® externally and you stop heat before it enters.
Apply it internally and you reduce what still gets through.
Do both, and you stabilise the entire wall system.
That’s how you turn a lightweight wall into a high-performing thermal barrier.
Insulating Concrete Tilt-Up Walls – NEOtech Coatings
https://neotechcoatings.com/insulating-concrete-tilt-up-walls/
Your Home – Insulation Guide (Australian Government)
https://www.yourhome.gov.au/passive-design/insulation
CSIRO – Heat Flow and Building Performance
https://www.csiro.au/en/research/natural-environment/climate/energy-efficient-buildings
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