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The cellulose heat insulation meets the highest ecological requirements

After the directive insulation of walls and sealing of windows in Germany, a new problem concerning the extension of mold appeared in the residential buildings.

Reality has shown that a mindless heat conservation causes a heavy mold growth in wallpaper within two weeks after the completion of insulation of walls and sealing of windows.

In residential buildings, the air should be refreshed each hour.  Every day from 8 to 15 liters of household humidity vapors form as a result of our breathing, use of shower, bathroom, kitchen stove, and watering the flowers in a residential building All the vapors should be brought outside. The lack of natural wall breathing causes damage to residential buildings because of the heavy mold growth in the high humidity conditions.

The use of polymer insulation (foam materials) or mineral insulation with a polymer binder (mineral wool board, Rockwool, Isover, URSA) causes the humidity stagnation in the indoor space. The humidity condensates in the pores of mineral insulation due to increasing the pressure of heavy vapor according to the physical law, and the water fills the air pores of the material.

The wet mineral wool board cannot dry up and the mold grows in it. The vapor-proofing of the mineral wool board and wrapping with polyethylene foil protect the board, but do not prevent the formation of condensates in the walls. The walls with polymer insulation do not breathe.

Europe solved the problem of vapor permeability (breathing) of the insulated walls. For the last 15 years, Europe has given the preference to the natural insulation made of wood fibers over the cellulose heat insulation. The capillaries of wood fibers are permeable to water (capillary suction is widespread in nature: it determines the rise of sap in the plants) and transfer the water outside, it does not concentrate between fibers.

In 1999… 2001 the Institute of Thermal Insulation (Vilnius, Lithuania) investigated the humidity of insulation made of the wood fibers – “cellulose wool” in the brick walls (“Construction Materials” No. 7, 2001) The results of the investigations showed that the layer of cellulose wool did not accumulate the water, it went outside in the atmosphere. The fact was confirmed not only by the investigations but also the use of lightweight brick walls with cellulose wool insulation in Finland, Switzerland, England, Germany, USA and Canada, where the vapour-proofing and air space between the outer brick layer and insulation layer are not provided.

Since 2002 in Germany a so-called “Energy-Saving Regulations” that established the legal regulations approved by the European countries concerning the improvement of construction materials for energy-saving, and which contain the following: “… saving the costs of the energy consumption is more effective and biologically reasonable by means of the cellulose insulation under the use of construction method open to diffusion….)”,. for the release of vapor and carbon dioxide outside.

The requirement for sealing the heat-insulation layer becomes more significant: joint with 1 mm width and 1 m length decreases the coefficient of thermal insulation by 65% under strong wind. The cellulose heat insulation shall be installed by means of spraying and that is why it is jointless.

The volume of consumption of cellulose heat insulation in Europe and USA and Canada annually increases by 20…. 30% In Switzerland, the need in cellulose heat insulation (Isofloc) increases more than 2 times per year. 5 factories of cellulose heat insulation and 2500 blowing machines used for installing the cellulose heat insulation operate in Germany. Germany supplies the blowing machines to 8 European countries. 10 factories operate in Finland. 59 factories of cellulose heat insulation and 10000 blowing machines operate in the USA.

Today the bodies of ecological certification, which conduct the ecological certification of materials for the compliance with the most strict from the known ecological requirements of regulatory documents including international ISO standards and IEC, UNECE regulations and EU directives, European norms. The cellulose wool is a qualified and technically perfect thermal insulation that meets the highest ecological and biological requirements in construction. It is the only insulation which was entered by the International Ecological Fund into the Register of the “Ecologically-Clean (natural) and Safe Products”.

The cellulose heat insulation is used in many apartments, schools, nursery schools and other buildings and creates a comfortable and cozy environment in the room.