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TPO- THERMOPLASTIC OLEFIN
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Energy
Each thermoplastic membrane is
enhanced with a weathering package that helps
protect the integrity of
the membrane and prolong its
service life. As the sun beats down onto a
rooftop, the reservoir of weathering
package protects the surface of
the membrane from UV degradation. The thicker
the membrane, the more
weathering package is present
per unit of surface area and the longer the
membrane will retain its smooth,
glossy finish. We call this
phenomenon the reservoir effect. Properly
protected from the sun with this added
weathering protection, thicker
membranes will perform longer with no change in
surface characteristics.
Think of it like switching your sunscreen
from SPF-15 to SPF-50.
Strength
TPO membranes are single-ply roof membranes
constructed from ethylene propylene rubber. They
are designed to combine the durability of rubber
with the proven performance of hot-air weldable
seams. They have been tested as having excellent
resistance to ozone, are algae-resistant,
environmentally friendly and safe to install.
Seam strengths are reportedly 3 to 4 times those
of EPDM's adhesive and tape seams.
TPO is highly resistant to tears, impacts,
and punctures with good flexibility to allow for
building movement. TPO's are available in white,
light gray, and black with thicknesses of either
45 mils (.045") or 60 mils (.060"). The width of
the membrane depends on the manufacturer but
they usually come in widths of six to
six-and-a-half feet and are one-hundred feet in
length.
Installation TPO membranes are installed fully-adhered,
mechanically-attached or ballasted.
Fully-adhered means that the roof is "glued" to
the substrate using a special adhesive. What
actually happens is the glue creates a chemical
bond with the membrane. Ballasted simply means
the membrane is loose laid over the top of the
roof, sealed at all penetrations and around the
perimeter, and then a ballast is put on it to
hold it in place. Ballast usually consists of
smooth, round, river rock 2" - 3" in diameter
and is applied at a rate of 1,000 to 1,200
pounds per roof square (100 sq. ft.). Sometimes
concrete pavers are used in their place. These
average 20 pounds per square foot.
Mechanically-attached membranes are those that
use some type of special screw-type fastener to
secure it. The type of fastener will depend on
the type of substrate but all fasteners are
generally screw-type fasteners. |
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We provide Versico's VersiWeld
click here for information.
MBM Roofing is a certified Versico installer, go to our
Portfolio page to view jobs with TPO.
Click here if you would
like a sample sent to you.
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