, Strength: It should be noted that the intensity of the tensile strength, density and tensile strength of polystyrene board have absolute relationship Yantai insulation board manufacturers, general EPS density 18Kg / m3 tensile strength of 110 ~ 120KPa Hengshui insulation board manufacturer , 20Kg / m3 density at 140KPa around. XPS normal bulk density from 38Kg ~ 45Kg, intensity from 150KPa ~ 700KPa or higher, compared with EPS, XPS board strength must be high, so when the outer finish is brick or XPS system is relatively stable, and its load-bearing capacity than EPS system is higher. 3. Weather resistance: Weathering refers to the insulation system for the outside world the ability to adapt to climate change, refers to the different climatic conditions, the overall stability of the system, the insulation effect if there is a series of issues related to quality changes. Weather resistance is a very important indicator of the insulation system. Because compared with EPS board XPS has high water absorption, so his durability is better than XPS system now mature exterior insulation system are taken into account in each layer waterproof, because after absorbing weather insulation performance will be greatly decline. Because EPS relatively strong water absorption, water can reduce the insulation performance insulation board manufacturers, the sheet material softened, plus their strength is relatively low, the construction of the weather when demand is high, if you suck the water in the construction is not yet completely sun dried then undoubtedly show his weaknesses. If the exterior wall leakage point again, EPS dangerous. Permeability: permeability and water absorption are two different issues! The size of the air molecules and water molecules are very different! Of course there are breathable waterproof argument. Experiments can illustrate this point. Figuratively, in Shenzhen. Place a cookie on the outside, you do not go on watering biscuits, time of day, cookies will fall, because it absorb water, and water is sucked water from the air rather than liquid water. Currently have insulation system, which products do not dare call themselves the product both permeability, thermal conductivity and good, waterproof performance is good, is not absorbent, good for a full accounting. Because these indicators are contradictory. But also pay attention to ventilation breathable construction process after wet water permeability and the system after completion.