Non-flammable and vapour-permeable 3i-isolet insulation – The house that breathes

3i-insulation boards RD 200 are made from the mixture of granular foamed polystyrene and cement with
a bulk density of 200 kg/m3. The polystyren balls are cement-coated and the spaces between them
create a macroporous non-capillary structure. The mixture is homogenous and the cement skeleton
delivers strenght to the material and prevents a flame spread.

The content of small capillary pores – the short-term absorption with partial dipping is 2,45 kg/m2,
the long-term water absorption with partial dipping is 3,45 kg/m2 and due to interrupted capillaries
no water capillary action occurs. If water gets into the 3i- isolet material , it will re-dry,
because it is a diffusion-open structure.

Excellent vapour permeability, (µ = 5) is due to the high macroporousity in the spaces between
the polystyrene granules. So there is no dampening of the building cladding , mold formation
or capillary water rise.
Excellent diffusion properties are given by the large space capacity between
the balls, into which water vapour can diffuse.
(For comparison the vapour permeability of facade polystyrene is µ =40)

Incombustibility – the cement skeleton separating the individual polystyren granules from one
another prevents the flame from spreading. The material is classified according to
ČSN EN 13501-1 as A2 „non-flammable“

We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies. However you may visit Cookie Settings to provide a controlled consent.
Settings Accept
You can refuse consent here.
Cookie settings

This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorised as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyse and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.


Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.


Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.


Performance cookies are used to understand and analyse the key performance indexes of the website which helps in delivering a better user experience for the visitors.


Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customised ads.