Using Isobooster to make your home damp-free


Apart from keeping you home warm, Isobooster can also be used to tackle damp in e.g. basements and crawl spaces.  This article explains in brief how this works.




The chemical formula of water, H2O, is a DIPOLE, so the water molecules are drawn to each other like magnets. The surface tension works like a kind of skin. To illustrate: if you keep your hand steady and put a drop of water on the palm of your hand, you can put a needle on that drop, which then acts as a compass.


The capillary action in stone draws water upwards through the stone. This leads to damp walls, corners, crawl spaces, basements, etc. Stone walls start acting like a sponge at a relative humidity of 75%.




Photons are a form of electromagnetic radiation. Depending on the test set-up used, electromagnetic radiation will appear as waves or as a flow of massless particles, called photons.




Infrared light is light which is so red that humans cannot see it. It is a band on the electromagnetic spectrum between visible light and microwaves (think of the microwave oven).



Isobooster is a reflective aluminium foil spaced apart by one or more layers of polyethylene bubble wrap. Isobooster works as follows: it reflects the energy (photons) and infrared radiation back to where it came from. In an air cavity, this creates a to-and-fro-moving energy flow, continuous reflection. Virtually no energy or heat is lost along the way. It has been established in situ that the relative humidity in cavities or crawl spaces with aluminium reflection does not exceed 62%. The movement of the photons makes the water molecules vibrate in such a way that they break up into H and O. As the H (water vapour) is lighter and smaller than the O, it will rise. It can then escape through the cavity vents.  Diffusion through the stone is also possible.


Coandă effect


In the inner cavity (the warm side), the Coandă effect occurs: hot air sticks to the wall though the development of turbulence and a resulting vacuum. This is caused by the force of attraction between air molecules. There is a formula to calculate the cavity temperature. Based on this formula, we can establish that the relative humidity goes down when the temperature rises.  (Click here for a more detailed explanation of the Coandă effect)


FORMULA, expressed in Celsius: Tcavity = Topen air X 0.7+8




In 1925, Ernst Schmidt and Eduard Dyckerhoff invented the application of aluminium foil for insulatio. The material was sold under the name Alfol.  See the patent application here!


Using the insulation in a crawl space or basement
The insulation can be rolled out on the floor. According to the formula, the ambient temperature will be around 18 degrees, in summer and winter. The relative humidity decreases as moisture escapes through the cavity.  (See also: “Crawl space insulation“.)



Do you want to get started with the Isobooster? Contact PXA Nederland for more information and quotes.

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