Thermal Conductivity of Building Thermal Insulation Materials

As a standard rule, while deciding on a constructing insulation cloth, customers will first observe its thermal conductivity, the smaller the thermal conductivity, the higher the relative insulation overall performance, but when the insulation fabric implemented to the actual project, upgrade to the complete insulation gadget, its thermal conductivity isn't so easy. it's been proved that the thermal conductivity of the device is suffering from the utility generation degree of thermal insulation fabric, water-fuel surroundings and temperature condition, bloodless-warm bridge, design structure and creation technology.

Such as the common XPS, EPS, perlite plate, cement foam plate, foam glass plate, rock wool plate, various kinds of lightweight composite insulation board board board, such as board-type adhesive thin plastering insulation system, because of its construction characteristics, general will be used on the wall or dry hanging on the wall, so there will inevitably be cracks, contraction joints, rivets and other hot and cold bridges, made of the thermal conductivity of the system than the material itself about 2 times higher thermal conductivity. Some professionals have calculated that the thermal conductivity of organic foam insulation board is about 0.37 w/m. K, the thermal conductivity of the system will be as high as 0.115 w/m. The thermal conductivity of Inorganic Light Insulation Board is about 0.055 W/M. K, the thermal conductivity of the system will be up to 0.15 w/m. K. The main reason is that the method of putting these pieces of insulation board together on the wall will form a gap around each insulation board, in addition, the factors such as the aging of nails, the shrinkage joints caused by temperature deformation, the dewing of air-tight wall, the obstruction of water-air circulation, the quality and stability of material and system, etc.

Currently, the most effective insulation system in the market that can effectively avoid panel cracks and cold and Hot bridges is the YT inorganic insulation and heat insulation system of Yintong, Nanyang. The YT insulation material is white powder when it leaves the factory. It only needs to be mixed with water during construction and can be painted on the wall, it is very convenient and can realize net-free construction, so the steps such as plate splicing, anti-cracking mortar and Anchor Bolt are omitted, and the thermal conductivity of the whole insulation system is ensured greatly. After examination, the thermal conductivity of YT insulation material on the wall is ≤0.055, the indoor temperature can be increased by 6-10 °C in Winter and decreased by 6-8 °C in summer, which can meet the energy saving requirement of 65-75% . The YT insulation material grade a is non-flammable, which not only overcomes the problem that the traditional insulation mortar is easy to crack and fall off, but also avoids the combustible characteristics of the Insulation Board cold-hot Bridge and the organic insulation material, and has been approved by the Ministry of Construction of the state, it is a high cost-effective building insulation system, but in the selection must be recognized formal manufacturers.

China’s building energy-saving strategy, from the early application in Beijing, to the National Mandatory Promotion, has been more than 20 years, which insulation materials and related systems in reducing building energy consumption has also played an important role. The thermal conductivity of each insulation material and insulation system is different, and the construction method is different. Users should strictly select the material according to the actual situation of each place, and carry out high-standard construction so that the insulation material and system can better play its due role of thermal insulation, for the building energy efficiency to make their own contribution.