Expansion and contraction,
ponding, moisture, thermal shock, and temperature extremes are all factors that
promote premature degradation of a roofing membrane. The great elongation and
low temperature flexibility of EPDM membrane accommodate building movement in
various climatic conditions without stressing the material. Its moisture
absorption resistance allows the material to be installed in assemblies with
lesser slope than other single-plies and makes it tolerable to incidental
ponding and deflection. Unlike built-up roofing, EPDM membrane does not contain
organic material that can decay as the result of moisture caused by condensation
or leaks. EPDM membrane, due to its ability to withstand extreme temperature,
can be successfully used in assemblies with greater thermal resistance (thicker
insulations with higher R-values). The ability of a roofing membrane to
withstand temperature extremes is an important trait of a high performance
material because temperature extremes could promote premature membrane aging and
reduce the life expectancy of a roof.
WINNER: EPDM
From what I know, EPDM requires very little or no maintenance, and it is totally resistant to atmospheric pollution, which makes it a very good choice for urban roofing. It is quite suitable for most flat or slightly pitched roofs as well. The membranes flex and repel changes in temperature without cracking or peeling, and this is mainly due to the flexibility and durability of the single ply synthetic rubber material it is composed of.
ReplyDeleteSierra Nordgren
Indeed, EPDM could be the best option for roofing. It is easy to maintain, and it lasts longer than most of its counterparts. The only drawback it has is its expensive price. If you opt to have this for your roof, you must check your budget and you might as well compute for the ROI. That way, you can determine if you should indeed invest on this kind of roofing or not.
ReplyDeleteLino Kosters
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