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住户和设计者中大多数人尽管对80年代“全新和改进”的屋面体系认为是可靠的,如今也渐渐地发现叠层屋面(BUR)仍是最经济和有效的屋面体系。最近的研究表明,BUR在非住宅建筑屋面市场正逐渐增加。根据1990年对非住宅建筑屋面承包商的调查,在BUR方面的承包商数目自1988年以来每年以10％的速度递增。如今,在美国用于商业、工业和学校建筑物的沥青基叠层屋面已超过
Most of the households and designers, although considered reliable for the “new and improved” roofing system of the 1980s, are gradually finding that laminated roof (BUR) is still the most economical and effective roofing system. Recent research shows that BUR is gradually increasing in the non-residential building roofing market. According to a survey of non-residential roofing contractors in 1990, the number of contractors in BUR has increased by 10% annually since 1988. Pavement-based laminated roofs for commercial, industrial and school buildings in the United States have exceeded today