Vermiculite Facts



Thermal conductivity of 20 cm layer of vermiculite filling is equivalent to 1.5 m thick brick wall or 2 m thick concrete wall.





5 cm thick layer of vermiculite in the attic slabs reduces heat loss by 75%, 7.5 cm thickness - by 85%, 10 cm thickness - by 95%.





2 cm thick vermiculite plaster substitutes for 20 cm thick cement-sand mortar.





3 cm thick vermiculite plaster can reduce thickness of a brick wall by 25%.





Using vermiculite mortars on brick walls allows saving of 0.25 m3 of brick per 1 m3 of masonry.





The sound absorption coefficient of vermiculite plaster is 0.15-0.3, while that of ordinary sand plaster is 0.015-0.02.





Due to the high porosity vermiculite mortars have 4 times less bulk density and 6 times lower coefficient of thermal conductivity in comparison to conventional (sand) mortars.





Fire-retardant efficiency of vermiculite mortars is 4 times higher than that of sand mortars.





8 mm thick vermiculite mortars provide 1.5 h fire-endurance period for roofs and ceilings.





20 mm thick ferrocement boards with 13 mm thick fireproof vermiculite mortar have fire-endurance period of up to 10 hours.





Vermiculite mortars with a bulk density of 500-800 kg/m3, heated to a temperature of 900-1000 0C and placed in water, do not crack. Cellular concretes under the same conditions are completely destroyed.





The optimal thickness of exfoliated vermiculite in the device of floors and roofs, as well as in filling the gaps between the walls ranges from 100-150 mm.





According to the International Classification, sound absorption properties of exfoliated vermiculite with 100 mm layer are referred to Class A, which is assigned only to sound proofers.





At a frequency of 2000 Hz the sound absorption coefficient of exfoliated vermiculite (layer thickness - 100 mm, grain sizes up to 8 mm) is 1, while for the glass wool - 0.64, for felt - 0.79, and for 23 cm thick brick wall – 0.49.





Shelf life and expiration date are not limited. Vermiculite does not rot, or decompose.





Vermiculite is the only material capable to provide building structures with high fire resistance, heat and sound insulation, as well as decoration.





Vermiculite is not afraid of salinization! Traditional hydroponic substrates accumulate salt in 2-3 years and become unsuitable for plants. Calcium and magnesium chlorides are mainly formed in vermiculite, but they are highly soluble. Wash with plain water before changing solution and the substrate is clean!





Insects, fungi and rodents do not live in vermiculite.





Many of the world football clubs use exfoliated vermiculite for drainage and for growing grass on their football fields.





Having served in hydroponic greenhouses for 10-15 years, vermiculite can be used outdoors as a cultivator, water holding component, and a source of magnesium, calcium and potassium until its full destruction.

20.04.2021   12:01

(+998 95) 144 69 00

       (+998 99) 612 52 76