Single-Ply Membrane
Single ply is a flat, synthetic polymer based roofing material that, as the name suggests, provides a waterproofing layer in a single sheet. Usually supplied in rolls, the material is either entirely homogeneous or contains a reinforcement layer.
EDPM
EPDM Roofing Systems have been installed since the early 1970’s. An EPDM roof system comes in thicknesses from. 045 mil to .090 mil, can be reinforced or non-reinforced, and is typically black in color, but can be white. An EPDM membrane installation can be mechanically attached, fully adhered, or ballasted.
BENEFITS
EPDM Roof Systems have been one of the most popular choices in flat roofing for many reasons:
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Proven system that has been installed for over 50+ years
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Strong puncture resistance, especially with reinforced systems
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Rubber rarely deteriorates over time
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Easier to install and patch than heat welded systems
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Very flexible material, which is useful for buildings that expand or contract over time
EPDM
Wall Flashing Detail
The most challenging aspect of installing a flat roof is often the flashing details, and they are a common culprit for roof leaks.
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These small areas account for 90% of all roof leaks, as their installation demands great craftsmanship from the roofing mechanic. Choosing an experienced and professional crew to install an EPDM membrane can make all the difference. While saving money at the outset may seem appealing, it could ultimately cost thousands in future repairs.
EPDM PROS
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Most cost-effective material for flat or low-sloped roofs
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Long-lasting roofing material with a lifespan of more than 20 years
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Energy-efficient as it can be easily combined with polyiso insulation
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Requires fewer seams owing to its large sheet sizE
EPDM CONS
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Slightly more expensive when mechanically installed
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Requires rigorous maintenance
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Not resistant to animal and vegetable oils
TPO
The commercial roofing market has seen a surge in the popularity of Thermoplastic Polyolefin (TPO) as a roofing material due to its impressive qualities. TPO is a type of rubber that results from combining polypropylene and ethylene-propylene rubber.One of the key benefits of TPO is its affordability, making it the cheapest material available for single-ply membrane roofs compared to EPDM and other rolled rubber roofing options. TPO is also typically white, providing a reflective surface that minimizes heat buildup within the building.Moreover, TPO offers versatile installation options, including adhesives, nailing, and heat welding around protrusions such as chimneys. Additionally, TPO is highly durable, resistant to corrosion and the formation of mildew or algae. Cleaning TPO is also effortless, as it does not require pressure washing.