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美国的消费者总是希望物有所值。根据2007年NRCA市场调查,单层屋面几乎占了商业屋面市场的50%,而且这一份额还在继续增长,可能这就是其中的一个原因。高反射TPO卷材在温暖的南方地区十分普遍,而EPDM在冬季气候十分严酷、采暖度日指数大于制冷度日指数的北方受青睐。单层卷材屋面可以做成压
American consumers always want value for money. This may be one of the reasons, according to the 2007 NRCA market survey, where single storey roofs make up almost 50% of the commercial roofing market and this share continues to grow. Highly reflective TPO coils are common in the warmer South, while EPDM is extremely harsh in winter and favors the North in days whose heating index is greater than the Refrigeration Index. Single-layer membrane roof can be made pressure