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美国１９９４年对屋面承包商的调研在同一时间，《ＲＳＩ》杂志进行了１９９４年工商业屋面承包商调研．调研结果表明叠层油毡屋面重新返回势头强劲，屋面维修作业量增加，三元乙丙橡胶防水膜使用接缝带和覆盖带的数量大量增加．各种材料使用比例１９９３年新屋面市场中平...
US Survey of Roofing Contractors in 1994 At the same time, RSI conducted a survey of commercial and industrial roofing contractors in 1994. The survey results show that the laminated felt roof returns to a strong momentum and the amount of roofing maintenance work increases. The quantity of seams and cover tapes used in EPDM waterproofing membranes has increased significantly. The proportion of various materials used in the new roofing market in 1993 ...