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首页> 美国卫生研究院文献>Materials >Highly Insulated Wall Systems with Exterior Insulation of Polyisocyanurate under Different Facer Materials: Material Characterization and Long-Term Hygrothermal Performance Assessment
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Highly Insulated Wall Systems with Exterior Insulation of Polyisocyanurate under Different Facer Materials: Material Characterization and Long-Term Hygrothermal Performance Assessment

机译：高度绝缘墙系统具有不同面料的多异氰脲酸盐外部绝缘材料：材料表征和长期湿热性能评估

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摘要

The application of exterior insulation in both new construction and retrofits is a common practice to enhance the energy efficiency of buildings. In addition to increased thermal performance, the rigid insulation can serve to keep the sheathing board warm and serve as a water-resistive barrier to keep moisture-related problems due to condensation and wind-driven rain. Polyisocyanurate (PIR) rigid boards have a higher thermal resistance in comparison to other commonly used exterior insulation boards. However, because of its perceived lower permeance, its use as exterior insulation is not very common. In this study, the hygrothermal property of PIR boards with different facer types and thicknesses is characterized. The material data obtained through experimental test and extrapolation is used in a long term hygrothermal performance assessment of a wood frame wall with PIR boards as exterior insulation. Results show that PIR with no facer has the smallest accumulated moisture on the sheathing board in comparison to other insulation boards. Walls with a bigger thickness of exterior insulation perform better when no vapor barrier is used. The PIR exterior insulation supports the moisture control strategy well in colder climates in perfect wall scenarios, where there is no air leakage and moisture intrusion. In cases where there is trapped moisture, the sheathing board has a higher moisture content with PIR boards with both aluminum or fiberglass type facers. An innovative facer material development for PIR boards can help efforts targeting improved energy-efficient and durable wall systems.
机译：外部绝缘在新建建筑和改造中的应用是一种常见的做法，可以提高建筑物的能量效率。除了增加热性能外，刚性绝缘材料还可用于将护套板保持温暖，并用作防水屏障，以防止由于冷凝和风力驱动的雨水引起的水分相关问题。与其他常用的外部保温板相比，多异氰脲酸盐（PIR）刚性板具有更高的热阻。然而，由于其感知较低的渗透率，其用作外部绝缘的用途并不是很常见。在该研究中，特征在于，具有不同面部类型和厚度的PIR板的湿热特性。通过实验试验和外推获得的材料数据用于长期湿热的木框架壁的性能评估，用PIR板作为外部绝缘材料。结果表明，与其他绝缘板相比，没有面部的PIR在护套板上具有最小的累积水分。当没有使用蒸汽屏障时，外部绝缘层厚度较大的墙壁更好。 PIR外部绝缘材料在完美的墙体场景中较冷的气候良好地支持水分控制策略，没有漏气和湿气的侵入。在捕获水分的情况下，护套板具有更高的水分含量，具有铝或玻璃纤维型面部的PIR板。 PIR板的创新面料开发可以帮助努力实现改进的节能和耐用的墙系统。

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