Before choosing a foam block, you must immediately pay attention to its color. The most correct choice will be the blocks of dark – or light gray color. The white color of the unit suggests that it is either gas -wiring or in manufacture violated the technology and added lime instead of cement, which significantly reduces its environmental friendliness, as well as strength. Respectively, and the price of such blocks will be lower than follows. In high quality foam blocks, the bubbles contained in them are separated from each other, neither less, if they are connected, the gasolid block. Through the isolation of the bubbles, the blocks will not absorb moisture and their thermal conductivity will increase. The manufacture of foam blocks involves compliance with certain rules and parameters. It should be perfectly even, without assuming the use of glue during laying. To check how even foam block, fold them on each other. If the blocks sway, then the deviation exceeds the norm. Carefully check the blocks for chips. The surface should be homogeneous, and only round bubbles. Otherwise, the strength of the foam block will suffer.
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