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Madsen Roof Company specializes in
the application and maintenance of
single-ply roofing membranes. A standard
material for low-slope (less than
25% grade) roof systems, single-ply
roofing membranes are generally factory
made panels composed of thermoplastic
and thermoset products.
Flexible to budgets and needs, Madsen
can install and upgrade single-ply
roof systems using various methods,
including ballasted, fully adhered,
mechanically attached to an approved
substrate, or as a protected membrane
roof. In fact, Madsen Project Managers
consult directly with the commercial
roofing membrane manufacturers regarding
the most effective securement configuration
options for each project.
Although they
do not offer the strength of Built-up
Roofs, single-ply roofs are lightweight
and offer the most cost-effective
“cool roof” benefits and Title 24 compliance. For low-slopes systems, alternatives to single-ply roofing that Madsen Roof Company offers include, modified bitumen, built-up roofs, polyurethane foam, and metal roofs.
Thermoplastic Polyolefin (TPO)
Addressing the volatile climate conditions of Northern California, Madsen Roof Company is an expert installer of this dynamic thermoplastic single-ply membrane. Composed primarily of polypropylene or polyethylene, TPO systems do not require plasticizers for flexibility, mitigating the risk of a breached roofing system.
Depending on the functional needs
of the building envelope system, Madsen
Roof Company can apply complement
TPO roof membranes with flame-retardants,
pigments, UV absorbers, and other
proprietary ingredients.
Polyvinyl Chloride (PVC)
Also a quality single-ply roofing
membrane, PVC is commonly used for
steep-slope roofing systems where
sheets are produced by calendaring,
spread coating, or extrusion and are
typically reinforced with a fabric
mat or scrim. A desired benefit of
PVC membranes is that they are manufactured
in a spectrum of colors.
Madsen Roof Company recommends the use of reinforced sheets, complying with ASTM Standard D 4434, Standard Specification for Poly (Vinyl Chloride) Sheet Roofing, for field membrane applications. Reinforced membrane materials may provide the best service for the main field of the roof, perimeters, and most flashings. Where recommended by the manufacturer, membrane materials that are not reinforced, may be suited for prefabricated penetration flashing boots and other specific detail applications.
Ethylene Propylene Diene Monomer
(EPDM)
Historically the most common single-ply
membrane employed in commercial roofing,
EPDM is simply a synthetic rubber
sheet. Known to be the most resistant
to weathering, these membranes are
ideal for large commercial roofing
systems with limited penetrations.
Although they are cheaper to install
and maintain, EPDM roofs are easily
compromised by a myriad of conditions
and variables introduced by everyday
businesses. For example the exhaust
from restaurant kitchens can quickly
breakdown these membranes, as well
as exposure to commonplace solvents.
To protect EPDM membranes, commercial
roofers commonly use Epichlorohydrin
(ECH) membranes as a substitute and/or
complement. Similar in appearance
and functionality, these membranes
are resistant to the risks previously
mentioned — although more expensive.
Given that EPDM roofing is so temperamental,
quality installation demands an experienced
commercial roofing company's understanding
of the material's limitations.
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