Misunderstanding 1: The thicker the multi-layer parquet flooring, the better
If it is ensured that in the geothermal environment, the skin of the thick-faced (3~4mm) multi-layer solid wood composite floor will not crack, the pre-compression stress production process can solve this problem. The advantages of the thick-skinned multi-layer solid wood composite floor is that the skin has good compressive performance and has the characteristics of a solid wood floor. Due to the thick skin of the floor, in the process of alternating the normal environment and the geothermal environment, with the change of the moisture content of the floor, due to the large amount of expansion and contraction of the skin and the substrate, the floor is greatly deformed. The author carried out the following experiment, the multilayered engineered wood flooring with water content of 8% was subjected to different environmental tests. The thickness of the surface of the floor was 2mm, 3mm and 4mm respectively; the simulation of the northern summer environment made the moisture content of the floor reach 13%. Then simulate the northern winter geothermal extreme environment, so that the water content of the floor reached 4%.
Misunderstanding 2: The wider the floor, the better, the longer the floor, the better
The length and width of the multi-layer engineered wood flooring change with the change of the environment humidity. The larger the floorboard size, the greater the stress that the floor board produces when it shrinks and swells, and the opportunities for floor deformation and skin cracking increase. The wider the multi-layer engineered wood flooring, the greater the side gap that occurs when shrinking. Similarly, the longer the multi-layer engineered flooring, the greater the gap created by the end of the floor when shrinking.
Misunderstanding 3: The geothermal floor backboard is grooved, which is good for hot gas flow
Some people think that the geothermal floor backplane is well grooved, which is conducive to hot gas flow, and even makes the floor backboard into a hollow structure. In fact, the thermal conductivity of solids is higher than the thermal conductivity of gas. The higher the density is, the faster the thermal conductivity is. This is one of the important reasons why we increase the density of the floor substrate. The back of the floor is longitudinally slotted, and an air layer is formed at the slot on the back of the floor. Since the thermal conductivity of air (0.02 at 20°C) is lower than the thermal conductivity of wood (about 0.08 to 0.18 for wood), the thermal conductivity is reduced to some extent. . The hollow structure forms an air layer between the surface of the ground and the floor surface to reduce heat conduction, and this structure floor is better for use in normal environments.
Misunderstanding 4: Cut the moisture-proof film into strips for heat conduction
Some flooring installation companies do not stick the moisture-proof membrane joints when installing flooring. Some individual installation companies even cut the moisture-proof membrane into many small holes. The purpose is to breathe and improve heat conduction. Usually, after the geothermal project is completed, the moisture content in the ground cement is at least 17%. During the geothermal heating process, the water on the ground is continuously distributed outwards. The damaged moisture-proof membrane directly acts on the back of the floor, resulting in delamination and bulging. Fry paint and the discoloration of the floor. Therefore, we should not only cut the moisture-proof film into many small mouths, but also use moisture-proof plastic film tape to ensure airtightness. This will prevent the moisture in the ground from harming the floor.
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