We know from the observation of nature that water can be varied in liquid, solid and gaseous states.When the outside temperature changes, the water also changes its physical properties, such as condensation.Dewcondensation is a physical phenomenon, which means that when the surface temperature of an object is lower than the dew point temperature in the nearby air, the structure and molecular distance between the water molecules change, and the condensation process is changed from gas to liquid.

When the condensation phenomenon occurs on the inside surface of the building, the surrounding environment becomes warm and moist, which is suitable for the growth of microorganisms. There will be mildew, corrosion, deterioration of material properties and other changes, which will lead to the destruction of the performance of the building structure and materials, and even more serious deterioration of the environment and disease.

How to prevent and prevent the occurrence of dew condensation?The study shows that when the inner surface of the building exterior wall is selected, the outer envelope structure with small heat transfer coefficient and high thickness is selected to make its inner surface temperature not too low and ensure that its surface does not produce condensed water.

Rubber and plastic is a kind of insulating material with closed cell foaming structure. All the bubbles are independent of each other, and the non-connected bubbles form a closed air layer, which effectively improves the thermal insulation performance and waterproof penetration ability of the product, so as to ensure the long-term effective and stable performance of the product.Therefore, building insulation will choose rubber and plastic insulation materials as exterior wall filling materials to prevent the occurrence of condensation hazards.