Roof Membrane Systems: Advantages and Disadvantages
Membrane System Advantages Disadvantages
EPDM Economical Life
Span – 15 years
Track Record
to 1980s Seams require
continual maintenance
Flexible
Sheet Ponding
water is detrimental
Extensive
maintenance required
Single
layer of protection
PVC Economical Environmental Issues (Chloride)
Seams strong
as welded steel Life Span – 15 years
Ponded water
not an issue Single layer of
protection
Track Record
to 1980s
TPO Economical Change in Material Formulations
Seams strong
as welded steel Life Span – 15 years
Flexible
Sheet Limited
Track Record – mid 1990s
Ponded water
not an issue Single layer of
protection
Modified
Bitumen Life Span – 20+ years Costly
Multiple
Layers of Protection Ponding water is
detrimental
Track record
to 1980s Coating required for
long-term
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