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Single-ply
roof systems are generally factory fabricated and installed in the field
as a single layer. Single-ply roofing systems are delivered on a roll,
or folded, and can be loose-laid, fully adhered or mechanically attached
to the substrate. The laps of these systems are heat or chemically welded
or spliced together with an adhesive.
Single-ply roofing systems offer ease of installation, are lighter weight
and usually cost less because of labor installation savings.
ChemTech Roof & Insulation Systems installs the following types
of single-ply roofing systems:
- TPO
(Thermoplastic Polyolefin) includes the advantages of bitumen and
polystyrene compatibility, very good low temperature flexibility,
excellent puncture resistance and increased welding rates. TPO is
the fastest growing product type in the roofing industry
- EPDM
(Ethylene Propylene Diene Monomer) is a membrane that is essentially
rubber with an additive to provide tensile strength. In the case of
black EPDM, the major additive is black carbon. Black EPDM is one
of the least expensive roof systems to manufacture and install and
as a result accounts for one-half of the single-ply industry. The
EPDM membrane is available in very large sheets; therefore, the quick
covering of large roof areas is possible. EPDM membrane is available
in several thicknesses and optionally reinforced with a polyester
scrim
- PVC
(Polyvinyl Chloride) is a membrane that is a thermoplastic material
that is available in a variety of thicknesses and optional reinforcements.
Like most single-ply systems the material can be formed into many
shapes and conditions using heat and adhesives. PVC has excellent
resistance to harsh chemical environments and offers a selection of
colors, when aesthetics are an issue
Which
type of membrane should I use?
There are many factors which will help you determine the best system
for a particular project. Usually, there will be a number of options,
each which presents some unique advantages and each of which would be
suitable. The decision should not be made on the basis of cost alone.
Other important considerations are building height; wind exposure; anticipated
roof traffic; chemical environment; and aesthetics.
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