Single-ply membranes have become important players in the
low-slope roofing market. Products such as EPDM and PVC have been
used in the U.S. roofing industry since the late 1970s. TPO has
been used as a roof membrane since 1991 and currently is the
fastest-growing segment of the low-slope market, according to
surveys conducted by NRCA and SPRI. Like all products,
single-ply membranes have had their problems. However, they are
considered dependable and competitive roof systems.
Many in the roofing industry believe fully adhered single-ply
membrane roof systems are the best single-ply roof systems
available. There are a number of reasons for this belief, including
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