Styrofoam and ecology. A question for thinking people. Why do you believe in what you believe? In the case of expanded polystyrene, because ‘everyone’ says and knows that it is ‘harmful’. And, consequently, we are used to thinking so.

We believe that, at first glance, styrofoam and eco-friendliness seem incompatible, but it is only superficial. Let’s start with the fact that Ecsoen permanent moulds are composed of air to 98% and only the remaining two percent is composed of ‘harmful’ polystyrene. For some reason, we think of ‘harmfulness’ when it comes to construction, but not when we buy cut meat products, coffee in a thermal mug or take-away food in the store. These are some of the most extreme examples. Next – packaging for all household appliances, pellets in sitting bags, thermos bags and boxes for fish and seafood. Also, when wearing a helmet for yourself and your children, do you think it consists of this material as well? Styrofoam is also widely used in medicine. By the way, expanded polystyrene is also used for the thermal insulation of donor organ transport containers! Does anyone make these from blocks or cotton wool? There are no bad or good building materials, there is the price of the materials and the effect that can be obtained at that price. As a household thermal insulation material, expanded polystyrene has been proving itself for 70 years, as a building material for both permanent moulds and for a little less, 50 years, for thermal insulation – the first foundations of the building were poured by using this technology in 1966 !

Styrofoam is a 100% recyclable material and there is very little pollution in its production process, as it mainly uses water vapour! There is no waste in the production process, as all leftovers and scraps are recycled.

Polystyrene foam does not biodegrade. This is generally considered to be a disadvantage, but it only proves that neither air nor water is polluted by chemical elements for this reason. It is also long-lasting – it will serve as a thermal insulation material for a long time. Styrofoam is inert, it retains its inertness in most common environments and retains all its properties at temperatures from -80 ˚C to 100 ˚C. The experience of US and Canadian builders shows that buildings built in the late 1960s still serve today. EPS practically does not absorb water and its surface is not nutritious to any microorganisms.

Polystyrene and combustion.

One of the most common arguments when thinking of EPS (expanded polystyrene) as a harmful material is combustion. But when compared to furniture, a burning kitchen appliance emits 65-70 times more CO2 than the same amount of burning expanded polystyrene.

BREEAM (BRE Environmental Assessment Method), a world-renowned method for determining the environmental performance of buildings, has recognised EPS as environmentally friendly and has given polystyrene foam the highest possible rating of A+. (

We offer a small mental experiment – put, maybe in your imagination only, your sandwich on a piece of mineral wool, an aerated concrete block and a sheet of polystyrene foam. Which of these three would you be willing to eat?

Do not devote all work to nature, protect it and do not pollute it! Then there will be no need to blame this great thermal insulation material for its non-eco-friendliness.

Read more about our block raw materials in the section Raw materials for the blocks.