How does insulating with Isobooster work?

The world of insulation tends to rely on conventional materials such as rock wool or glass wool. Unhealthy and awkward materials, yet they continue to be used ‘because we don’t know any better’. Isobooster uses the reflective qualities of aluminium. But How does insulating with Isobooster work exactly?

We all know that aluminimium is an effective insulator, judging from the amount of aluminium foil the average household uses to keep food hot or cold. In order to convince you that this simple, well-known principle can also be used on a bigger scale – to insulate your home – we will explain the science behind our innovative insulation foil.

The ISOBOOSTER effect in a nutshell:

Not absorbing, but reflecting

The purpose of insulation in renovation projects or new buildings is usually to keep heat inside the spaces for as long as possible. A buffer is created between the desirable room temperature and the undesirable outside temperature. Loss of heat is caused by materials absorbing heat rays. Unlike conventional insulation such as rock or glass wool, Isobooster is not based simply on separating heat from cold. Isobooster insulation foil reflects the heat radiation, sending it back into the room at almost the same intensity, simply reusing the heat that would otherwise have been lost.

Where does the heat come from?

The secret behind the success of Isobooster is the reflection of thermal infrared radiation. Infrared radiation is a band on the electromagnetic spectrum between visible light and microwaves (think of the microwave oven). Unlike other energy waves (such as UV-A), thermal infrared radiation is not absorbed by the air, but transmitted (let through). The radiation stays intact until it is absorbed by an object or surface. No energy is lost along the way (the radiation is not weakened). A lot of infrared radiation is the result of sunlight heating up surfaces and objects, which changes the frequency of that radiation and creates infrared. Wherever sunlight is absorbed, infrared can continue to heat.

...and where does the water go?

This thermal infrared radiation causes the water molecules to vibrate and disintegrate; evaporate. This effect occurs with so-called ‘far infrared radiation’ (which humans also radiate). It does not require any extreme heat or special equipment. It is a very common, everyday phenomenon.
Dry air expands as it heats up, and contracts when it cools down. In other words: dry air is heavier than humid air. That explains why water vapour rises (clouds do not drop) and why dry air does not move, but stays in the same place. The rising humid air escapes through the cavity.
Heat reflection causes water molecules to vibrate and makes the water evaporate. The air becomes drier and the relative humidity decreases.

In order to make moisture evaporate, even in places without any sunlight (e.g. crawl spaces and cavity walls or roofs), it is essential for the infrared to be reflected. That is where Isobooster comes in.

The power of repetition

Thermal infrared thus causes water to evaporate. The so-called Coanda effect ensures that this is a continuous process. It creates a layer of dry air along the surface on which the reflective foil has been applied. In the early 20th century, physicist Henri Coanda discovered that hot, rising air always moves upwards along surfaces (e.g. cold outer walls): the Coanda effect. Air flowing along the wall creates low pressure, drawing the rising air towards the surface of the wall. This causes air to flow continuously along the surface. The heat is also continuously reflected, creating a constant layer of dry air along the wall.

The drier, the better

The repeated reflection of thermal infrared causes a lot more moisture to evaporate than would otherwise have been the case. As long as the vapour is allowed to escape, the air that remains is dry. Dry air insulates twice as well as humid air, leads to a healthier living environment, and helps to prevent mould. It also ‘draws’ the moisture out of the material (stone, wood or plaster), resulting in drier walls. Dry walls absorb more heat and give off heat much better (slower) than damp walls.

Isobooster turns your walls and floors into effective infrared radiators!

Get started?

Physics (or rather, the world) is full of valuable and useful natural processes. With a bit of knowledge and insight, we can achieve maximum results with minimal means. As is so often the case, the smallest things hold the greatest power! If you would like more background information about the Isobooster effect, please have a look at our knowledge base or simply contact us at

Are you interested in the possibilities of insulating with isobooster? Contact our sales partner PXA Nederland for a quote! We have ample experience serving both the private and the professional market.

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